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Hello 算法
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5.3. 双向队列
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0. 写在前面
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0.1. 关于本书
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0.2. 如何使用本书
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0.3. 小结
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1. 引言
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1.1. 算法无处不在
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1.2. 算法是什么
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1.3. 小结
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2. 复杂度分析
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2.1. 算法效率评估
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2.2. 时间复杂度
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2.3. 空间复杂度
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2.4. 小结
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3. 数据结构简介
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3.1. 数据结构分类
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3.2. 基本数据类型
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3.3. 数字编码 *
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3.4. 字符编码 *
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3.5. 小结
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4. 数组与链表
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4.1. 数组
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4.2. 链表
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4.3. 列表
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4.4. 小结
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5. 栈与队列
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5.1. 栈
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5.2. 队列
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5.3. 双向队列
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5.3. 双向队列
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目录
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5.3.1. 双向队列常用操作
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5.3.2. 双向队列实现 *
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基于双向链表的实现
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基于数组的实现
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5.3.3. 双向队列应用
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5.4. 小结
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6. 散列表
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6.1. 哈希表（ ）
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6.2. 哈希冲突（ ）
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6.3. 哈希算法（ ）
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6.4. 小结
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7. 树
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7.1. 二叉树
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7.2. 二叉树遍历
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7.3. 二叉树数组表示
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7.5. AVL 树 *
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7.6. 小结
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8. 堆
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8.1. 堆
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8.2. 建堆操作
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8.3. Top-K 问题（ ）
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8.4. 小结
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9. 图
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9.1. 图
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9.2. 图基础操作
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< a href = "../../chapter_graph/summary/" class = "md-nav__link" >
9.4. 小结
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< div class = "md-nav__link md-nav__link--index " >
< a href = "../../chapter_searching/" > 10. 搜索< / a >
< label for = "__nav_11" >
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< / div >
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< nav class = "md-nav" data-md-level = "1" aria-labelledby = "__nav_11_label" aria-expanded = "false" >
< label class = "md-nav__title" for = "__nav_11" >
< span class = "md-nav__icon md-icon" > < / span >
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10. 搜索
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< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
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< a href = "../../chapter_searching/binary_search/" class = "md-nav__link" >
10.1. 二分查找（ ）
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< / li >
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10.3. 哈希优化策略
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< / li >
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< a href = "../../chapter_searching/searching_algorithm_revisited/" class = "md-nav__link" >
10.4. 重识搜索算法
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< / li >
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10.5. 小结
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< a href = "../../chapter_sorting/" > 11. 排序< / a >
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11. 排序
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< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
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< a href = "../../chapter_sorting/sorting_algorithm/" class = "md-nav__link" >
11.1. 排序算法
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< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/selection_sort/" class = "md-nav__link" >
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11.2. 选择排序（ ）
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< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/bubble_sort/" class = "md-nav__link" >
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11.3. 冒泡排序
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< / li >
< li class = "md-nav__item" >
< a href = "../../chapter_sorting/insertion_sort/" class = "md-nav__link" >
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11.4. 插入排序
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< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../chapter_sorting/quick_sort/" class = "md-nav__link" >
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11.5. 快速排序
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< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../chapter_sorting/merge_sort/" class = "md-nav__link" >
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11.6. 归并排序
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< / a >
< / li >
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< a href = "../../chapter_sorting/heap_sort/" class = "md-nav__link" >
11.7. 堆排序（ ）
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/bucket_sort/" class = "md-nav__link" >
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11.8. 桶排序
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< / a >
< / li >
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< a href = "../../chapter_sorting/counting_sort/" class = "md-nav__link" >
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11.9. 计数排序
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< / a >
< / li >
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< li class = "md-nav__item" >
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< a href = "../../chapter_sorting/radix_sort/" class = "md-nav__link" >
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11.10. 基数排序
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< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/summary/" class = "md-nav__link" >
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11.11. 小结
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< / ul >
< / nav >
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< li class = "md-nav__item md-nav__item--section md-nav__item--nested" >
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< div class = "md-nav__link md-nav__link--index " >
< a href = "../../chapter_backtracking/" > 12. 回溯< / a >
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< / div >
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< label class = "md-nav__title" for = "__nav_13" >
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12. 回溯
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< a href = "../../chapter_backtracking/backtracking_algorithm/" class = "md-nav__link" >
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12.1. 回溯算法
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< / a >
< / li >
< li class = "md-nav__item" >
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< a href = "../../chapter_backtracking/permutations_problem/" class = "md-nav__link" >
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12.2. 全排列问题
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< / a >
< / li >
< li class = "md-nav__item" >
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< a href = "../../chapter_backtracking/n_queens_problem/" class = "md-nav__link" >
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12.3. N 皇后问题
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< / ul >
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< label class = "md-nav__link" for = "__nav_14" id = "__nav_14_label" tabindex = "0" >
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13. 附录
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< label class = "md-nav__title" for = "__nav_14" >
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13. 附录
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< / label >
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< li class = "md-nav__item" >
< a href = "../../chapter_appendix/installation/" class = "md-nav__link" >
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13.1. 编程环境安装
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< a href = "../../chapter_appendix/contribution/" class = "md-nav__link" >
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13.2. 一起参与创作
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< / div >
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参考文献
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目录
< / label >
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< a href = "#531" class = "md-nav__link" >
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5.3.1. 双向队列常用操作
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5.3.2. 双向队列实现 *
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< / a >
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< nav class = "md-nav" aria-label = "5.3.2. 双向队列实现 *" >
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< a href = "#_1" class = "md-nav__link" >
基于双向链表的实现
< / a >
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< / li >
< li class = "md-nav__item" >
< a href = "#_2" class = "md-nav__link" >
基于数组的实现
< / a >
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< / ul >
< / nav >
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5.3.3. 双向队列应用
< / a >
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< / ul >
< / nav >
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< div class = "md-content" data-md-component = "content" >
< article class = "md-content__inner md-typeset" >
< a href = "https://github.com/krahets/hello-algo/tree/main/docs/chapter_stack_and_queue/deque.md" title = "编辑此页" class = "md-content__button md-icon" >
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4v-2m10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1 2.1 2.1Z" / > < / svg >
< / a >
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< h1 id = "53" > 5.3. 双向队列< a class = "headerlink" href = "#53" title = "Permanent link" > ¶ < / a > < / h1 >
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< p > 对于队列，我们仅能在头部删除或在尾部添加元素。然而，「双向队列 Deque」提供了更高的灵活性， < / p >
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< p > < img alt = "双向队列的操作" src = "../deque.assets/deque_operations.png" / > < / p >
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< p align = "center" > Fig. 双向队列的操作 < / p >
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< h2 id = "531" > 5.3.1. 双向队列常用操作< a class = "headerlink" href = "#531" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 双向队列的常用操作如下表所示，具体的方法名称需要根据所使用的编程语言来确定。< / p >
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< div class = "center-table" >
< table >
< thead >
< tr >
< th > 方法名< / th >
< th > 描述< / th >
< th > 时间复杂度< / th >
< / tr >
< / thead >
< tbody >
< tr >
< td > pushFirst()< / td >
< td > 将元素添加至队首< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< tr >
< td > pushLast()< / td >
< td > 将元素添加至队尾< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< tr >
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< td > popFirst()< / td >
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< td > 删除队首元素< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< tr >
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< td > popLast()< / td >
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< td > 删除队尾元素< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< tr >
< td > peekFirst()< / td >
< td > 访问队首元素< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< tr >
< td > peekLast()< / td >
< td > 访问队尾元素< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< / tbody >
< / table >
< / div >
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< p > 同样地，我们可以直接使用编程语言中已实现的双向队列类。< / p >
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< div class = "tabbed-set tabbed-alternate" data-tabs = "1:11" > < input checked = "checked" id = "__tabbed_1_1" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_2" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_3" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_4" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_5" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_6" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_7" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_8" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_9" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_10" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_11" name = "__tabbed_1" type = "radio" / > < div class = "tabbed-labels" > < label for = "__tabbed_1_1" > Java< / label > < label for = "__tabbed_1_2" > C++< / label > < label for = "__tabbed_1_3" > Python< / label > < label for = "__tabbed_1_4" > Go< / label > < label for = "__tabbed_1_5" > JavaScript< / label > < label for = "__tabbed_1_6" > TypeScript< / label > < label for = "__tabbed_1_7" > C< / label > < label for = "__tabbed_1_8" > C#< / label > < label for = "__tabbed_1_9" > Swift< / label > < label for = "__tabbed_1_10" > Zig< / label > < label for = "__tabbed_1_11" > Dart< / label > < / div >
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< div class = "tabbed-content" >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-0-1" name = "__codelineno-0-1" href = "#__codelineno-0-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-0-2" name = "__codelineno-0-2" href = "#__codelineno-0-2" > < / a > < span class = "n" > Deque< / span > < span class = "o" > < < / span > < span class = "n" > Integer< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > LinkedList< / span > < span class = "o" > < > < / span > < span class = "p" > ();< / span >
< a id = "__codelineno-0-3" name = "__codelineno-0-3" href = "#__codelineno-0-3" > < / a >
< a id = "__codelineno-0-4" name = "__codelineno-0-4" href = "#__codelineno-0-4" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-0-5" name = "__codelineno-0-5" href = "#__codelineno-0-5" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > offerLast< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队尾< / span >
< a id = "__codelineno-0-6" name = "__codelineno-0-6" href = "#__codelineno-0-6" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > offerLast< / span > < span class = "p" > (< / span > < span class = "mi" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-7" name = "__codelineno-0-7" href = "#__codelineno-0-7" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > offerLast< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-8" name = "__codelineno-0-8" href = "#__codelineno-0-8" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > offerFirst< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队首< / span >
< a id = "__codelineno-0-9" name = "__codelineno-0-9" href = "#__codelineno-0-9" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > offerFirst< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-10" name = "__codelineno-0-10" href = "#__codelineno-0-10" > < / a >
< a id = "__codelineno-0-11" name = "__codelineno-0-11" href = "#__codelineno-0-11" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-0-12" name = "__codelineno-0-12" href = "#__codelineno-0-12" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > peekFirst< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素< / span >
< a id = "__codelineno-0-13" name = "__codelineno-0-13" href = "#__codelineno-0-13" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > peekLast< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素< / span >
< a id = "__codelineno-0-14" name = "__codelineno-0-14" href = "#__codelineno-0-14" > < / a >
< a id = "__codelineno-0-15" name = "__codelineno-0-15" href = "#__codelineno-0-15" > < / a > < span class = "cm" > /* 元素出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-0-16" name = "__codelineno-0-16" href = "#__codelineno-0-16" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > pollFirst< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素出队< / span >
< a id = "__codelineno-0-17" name = "__codelineno-0-17" href = "#__codelineno-0-17" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > pollLast< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素出队< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-0-18" name = "__codelineno-0-18" href = "#__codelineno-0-18" > < / a >
< a id = "__codelineno-0-19" name = "__codelineno-0-19" href = "#__codelineno-0-19" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-0-20" name = "__codelineno-0-20" href = "#__codelineno-0-20" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > size< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-0-21" name = "__codelineno-0-21" href = "#__codelineno-0-21" > < / a >
< a id = "__codelineno-0-22" name = "__codelineno-0-22" href = "#__codelineno-0-22" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-0-23" name = "__codelineno-0-23" href = "#__codelineno-0-23" > < / a > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "na" > isEmpty< / span > < span class = "p" > ();< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-1-1" name = "__codelineno-1-1" href = "#__codelineno-1-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-1-2" name = "__codelineno-1-2" href = "#__codelineno-1-2" > < / a > < span class = "n" > deque< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-3" name = "__codelineno-1-3" href = "#__codelineno-1-3" > < / a >
< a id = "__codelineno-1-4" name = "__codelineno-1-4" href = "#__codelineno-1-4" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-1-5" name = "__codelineno-1-5" href = "#__codelineno-1-5" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > push_back< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队尾< / span >
< a id = "__codelineno-1-6" name = "__codelineno-1-6" href = "#__codelineno-1-6" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > push_back< / span > < span class = "p" > (< / span > < span class = "mi" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-7" name = "__codelineno-1-7" href = "#__codelineno-1-7" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > push_back< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-8" name = "__codelineno-1-8" href = "#__codelineno-1-8" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > push_front< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队首< / span >
< a id = "__codelineno-1-9" name = "__codelineno-1-9" href = "#__codelineno-1-9" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > push_front< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-10" name = "__codelineno-1-10" href = "#__codelineno-1-10" > < / a >
< a id = "__codelineno-1-11" name = "__codelineno-1-11" href = "#__codelineno-1-11" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-1-12" name = "__codelineno-1-12" href = "#__codelineno-1-12" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素< / span >
< a id = "__codelineno-1-13" name = "__codelineno-1-13" href = "#__codelineno-1-13" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > back< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > back< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素< / span >
< a id = "__codelineno-1-14" name = "__codelineno-1-14" href = "#__codelineno-1-14" > < / a >
< a id = "__codelineno-1-15" name = "__codelineno-1-15" href = "#__codelineno-1-15" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-1-16" name = "__codelineno-1-16" href = "#__codelineno-1-16" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > pop_front< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素出队< / span >
< a id = "__codelineno-1-17" name = "__codelineno-1-17" href = "#__codelineno-1-17" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > pop_back< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素出队< / span >
< a id = "__codelineno-1-18" name = "__codelineno-1-18" href = "#__codelineno-1-18" > < / a >
< a id = "__codelineno-1-19" name = "__codelineno-1-19" href = "#__codelineno-1-19" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-1-20" name = "__codelineno-1-20" href = "#__codelineno-1-20" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > size< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-1-21" name = "__codelineno-1-21" href = "#__codelineno-1-21" > < / a >
< a id = "__codelineno-1-22" name = "__codelineno-1-22" href = "#__codelineno-1-22" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-1-23" name = "__codelineno-1-23" href = "#__codelineno-1-23" > < / a > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > empty< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > empty< / span > < span class = "p" > ();< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-04-09 05:30:54 +08:00
< div class = "highlight" > < span class = "filename" > deque.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-2-1" name = "__codelineno-2-1" href = "#__codelineno-2-1" > < / a > < span class = "c1" > # 初始化双向队列< / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-2-2" name = "__codelineno-2-2" href = "#__codelineno-2-2" > < / a > < span class = "n" > deque< / span > < span class = "p" > :< / span > < span class = "n" > Deque< / span > < span class = "p" > [< / span > < span class = "nb" > int< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "n" > collections< / span > < span class = "o" > .< / span > < span class = "n" > deque< / span > < span class = "p" > ()< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-2-3" name = "__codelineno-2-3" href = "#__codelineno-2-3" > < / a >
2023-04-09 05:30:54 +08:00
< a id = "__codelineno-2-4" name = "__codelineno-2-4" href = "#__codelineno-2-4" > < / a > < span class = "c1" > # 元素入队< / span >
2023-03-12 02:44:47 +08:00
< a id = "__codelineno-2-5" name = "__codelineno-2-5" href = "#__codelineno-2-5" > < / a > < span class = "n" > deque< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "c1" > # 添加至队尾< / span >
< a id = "__codelineno-2-6" name = "__codelineno-2-6" href = "#__codelineno-2-6" > < / a > < span class = "n" > deque< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 5< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-7" name = "__codelineno-2-7" href = "#__codelineno-2-7" > < / a > < span class = "n" > deque< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-8" name = "__codelineno-2-8" href = "#__codelineno-2-8" > < / a > < span class = "n" > deque< / span > < span class = "o" > .< / span > < span class = "n" > appendleft< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > )< / span > < span class = "c1" > # 添加至队首< / span >
< a id = "__codelineno-2-9" name = "__codelineno-2-9" href = "#__codelineno-2-9" > < / a > < span class = "n" > deque< / span > < span class = "o" > .< / span > < span class = "n" > appendleft< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-2-10" name = "__codelineno-2-10" href = "#__codelineno-2-10" > < / a >
2023-04-09 05:30:54 +08:00
< a id = "__codelineno-2-11" name = "__codelineno-2-11" href = "#__codelineno-2-11" > < / a > < span class = "c1" > # 访问元素< / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-2-12" name = "__codelineno-2-12" href = "#__codelineno-2-12" > < / a > < span class = "n" > front< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "n" > deque< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ]< / span > < span class = "c1" > # 队首元素< / span >
< a id = "__codelineno-2-13" name = "__codelineno-2-13" href = "#__codelineno-2-13" > < / a > < span class = "n" > rear< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "n" > deque< / span > < span class = "p" > [< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > ]< / span > < span class = "c1" > # 队尾元素< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-2-14" name = "__codelineno-2-14" href = "#__codelineno-2-14" > < / a >
2023-04-09 05:30:54 +08:00
< a id = "__codelineno-2-15" name = "__codelineno-2-15" href = "#__codelineno-2-15" > < / a > < span class = "c1" > # 元素出队< / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-2-16" name = "__codelineno-2-16" href = "#__codelineno-2-16" > < / a > < span class = "n" > pop_front< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "n" > deque< / span > < span class = "o" > .< / span > < span class = "n" > popleft< / span > < span class = "p" > ()< / span > < span class = "c1" > # 队首元素出队< / span >
< a id = "__codelineno-2-17" name = "__codelineno-2-17" href = "#__codelineno-2-17" > < / a > < span class = "n" > pop_rear< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "n" > deque< / span > < span class = "o" > .< / span > < span class = "n" > pop< / span > < span class = "p" > ()< / span > < span class = "c1" > # 队尾元素出队< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-2-18" name = "__codelineno-2-18" href = "#__codelineno-2-18" > < / a >
2023-04-09 05:30:54 +08:00
< a id = "__codelineno-2-19" name = "__codelineno-2-19" href = "#__codelineno-2-19" > < / a > < span class = "c1" > # 获取双向队列的长度< / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-2-20" name = "__codelineno-2-20" href = "#__codelineno-2-20" > < / a > < span class = "n" > size< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-2-21" name = "__codelineno-2-21" href = "#__codelineno-2-21" > < / a >
2023-04-09 05:30:54 +08:00
< a id = "__codelineno-2-22" name = "__codelineno-2-22" href = "#__codelineno-2-22" > < / a > < span class = "c1" > # 判断双向队列是否为空< / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-2-23" name = "__codelineno-2-23" href = "#__codelineno-2-23" > < / a > < span class = "n" > is_empty< / span > < span class = "p" > :< / span > < span class = "nb" > bool< / span > < span class = "o" > =< / span > < span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "o" > ==< / span > < span class = "mi" > 0< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque_test.go< / span > < pre > < span > < / span > < code > < a id = "__codelineno-3-1" name = "__codelineno-3-1" href = "#__codelineno-3-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-3-2" name = "__codelineno-3-2" href = "#__codelineno-3-2" > < / a > < span class = "c1" > // 在 Go 中，将 list 作为双向队列使用< / span >
< a id = "__codelineno-3-3" name = "__codelineno-3-3" href = "#__codelineno-3-3" > < / a > < span class = "nx" > deque< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > list< / span > < span class = "p" > .< / span > < span class = "nx" > New< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-4" name = "__codelineno-3-4" href = "#__codelineno-3-4" > < / a >
< a id = "__codelineno-3-5" name = "__codelineno-3-5" href = "#__codelineno-3-5" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-3-6" name = "__codelineno-3-6" href = "#__codelineno-3-6" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > PushBack< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队尾< / span >
< a id = "__codelineno-3-7" name = "__codelineno-3-7" href = "#__codelineno-3-7" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > PushBack< / span > < span class = "p" > (< / span > < span class = "mi" > 5< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-8" name = "__codelineno-3-8" href = "#__codelineno-3-8" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > PushBack< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-9" name = "__codelineno-3-9" href = "#__codelineno-3-9" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > PushFront< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队首< / span >
< a id = "__codelineno-3-10" name = "__codelineno-3-10" href = "#__codelineno-3-10" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > PushFront< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-11" name = "__codelineno-3-11" href = "#__codelineno-3-11" > < / a >
< a id = "__codelineno-3-12" name = "__codelineno-3-12" href = "#__codelineno-3-12" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-3-13" name = "__codelineno-3-13" href = "#__codelineno-3-13" > < / a > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > Front< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素< / span >
< a id = "__codelineno-3-14" name = "__codelineno-3-14" href = "#__codelineno-3-14" > < / a > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > Back< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素< / span >
< a id = "__codelineno-3-15" name = "__codelineno-3-15" href = "#__codelineno-3-15" > < / a >
< a id = "__codelineno-3-16" name = "__codelineno-3-16" href = "#__codelineno-3-16" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-3-17" name = "__codelineno-3-17" href = "#__codelineno-3-17" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > Remove< / span > < span class = "p" > (< / span > < span class = "nx" > front< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素出队< / span >
< a id = "__codelineno-3-18" name = "__codelineno-3-18" href = "#__codelineno-3-18" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > Remove< / span > < span class = "p" > (< / span > < span class = "nx" > rear< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素出队< / span >
< a id = "__codelineno-3-19" name = "__codelineno-3-19" href = "#__codelineno-3-19" > < / a >
< a id = "__codelineno-3-20" name = "__codelineno-3-20" href = "#__codelineno-3-20" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-3-21" name = "__codelineno-3-21" href = "#__codelineno-3-21" > < / a > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > Len< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-22" name = "__codelineno-3-22" href = "#__codelineno-3-22" > < / a >
< a id = "__codelineno-3-23" name = "__codelineno-3-23" href = "#__codelineno-3-23" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-3-24" name = "__codelineno-3-24" href = "#__codelineno-3-24" > < / a > < span class = "nx" > isEmpty< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > Len< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque.js< / span > < pre > < span > < / span > < code > < a id = "__codelineno-4-1" name = "__codelineno-4-1" href = "#__codelineno-4-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-4-2" name = "__codelineno-4-2" href = "#__codelineno-4-2" > < / a > < span class = "c1" > // JavaScript 没有内置的双端队列，只能把 Array 当作双端队列来使用< / span >
< a id = "__codelineno-4-3" name = "__codelineno-4-3" href = "#__codelineno-4-3" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-4-4" name = "__codelineno-4-4" href = "#__codelineno-4-4" > < / a >
< a id = "__codelineno-4-5" name = "__codelineno-4-5" href = "#__codelineno-4-5" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-4-6" name = "__codelineno-4-6" href = "#__codelineno-4-6" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 2< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-7" name = "__codelineno-4-7" href = "#__codelineno-4-7" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-8" name = "__codelineno-4-8" href = "#__codelineno-4-8" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 4< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-9" name = "__codelineno-4-9" href = "#__codelineno-4-9" > < / a > < span class = "c1" > // 请注意， ， < / span >
< a id = "__codelineno-4-10" name = "__codelineno-4-10" href = "#__codelineno-4-10" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > unshift< / span > < span class = "p" > (< / span > < span class = "mf" > 3< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-11" name = "__codelineno-4-11" href = "#__codelineno-4-11" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > unshift< / span > < span class = "p" > (< / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-12" name = "__codelineno-4-12" href = "#__codelineno-4-12" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列 deque = " < / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-13" name = "__codelineno-4-13" href = "#__codelineno-4-13" > < / a >
< a id = "__codelineno-4-14" name = "__codelineno-4-14" href = "#__codelineno-4-14" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-4-15" name = "__codelineno-4-15" href = "#__codelineno-4-15" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > [< / span > < span class = "mf" > 0< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-4-16" name = "__codelineno-4-16" href = "#__codelineno-4-16" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队首元素 peekFirst = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-17" name = "__codelineno-4-17" href = "#__codelineno-4-17" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > [< / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-4-18" name = "__codelineno-4-18" href = "#__codelineno-4-18" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队尾元素 peekLast = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-19" name = "__codelineno-4-19" href = "#__codelineno-4-19" > < / a >
< a id = "__codelineno-4-20" name = "__codelineno-4-20" href = "#__codelineno-4-20" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-4-21" name = "__codelineno-4-21" href = "#__codelineno-4-21" > < / a > < span class = "c1" > // 请注意， ， < / span >
< a id = "__codelineno-4-22" name = "__codelineno-4-22" href = "#__codelineno-4-22" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > popFront< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > shift< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-4-23" name = "__codelineno-4-23" href = "#__codelineno-4-23" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队首出队元素 popFront = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > popFront< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s2" > " ，队首出队后 deque = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-24" name = "__codelineno-4-24" href = "#__codelineno-4-24" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > popBack< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > pop< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-4-25" name = "__codelineno-4-25" href = "#__codelineno-4-25" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队尾出队元素 popBack = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > popBack< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s2" > " ，队尾出队后 deque = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-26" name = "__codelineno-4-26" href = "#__codelineno-4-26" > < / a >
< a id = "__codelineno-4-27" name = "__codelineno-4-27" href = "#__codelineno-4-27" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-4-28" name = "__codelineno-4-28" href = "#__codelineno-4-28" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-4-29" name = "__codelineno-4-29" href = "#__codelineno-4-29" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列长度 size = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-30" name = "__codelineno-4-30" href = "#__codelineno-4-30" > < / a >
< a id = "__codelineno-4-31" name = "__codelineno-4-31" href = "#__codelineno-4-31" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-4-32" name = "__codelineno-4-32" href = "#__codelineno-4-32" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-4-33" name = "__codelineno-4-33" href = "#__codelineno-4-33" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列是否为空 = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > );< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque.ts< / span > < pre > < span > < / span > < code > < a id = "__codelineno-5-1" name = "__codelineno-5-1" href = "#__codelineno-5-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-5-2" name = "__codelineno-5-2" href = "#__codelineno-5-2" > < / a > < span class = "c1" > // TypeScript 没有内置的双端队列，只能把 Array 当作双端队列来使用< / span >
< a id = "__codelineno-5-3" name = "__codelineno-5-3" href = "#__codelineno-5-3" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-5-4" name = "__codelineno-5-4" href = "#__codelineno-5-4" > < / a >
< a id = "__codelineno-5-5" name = "__codelineno-5-5" href = "#__codelineno-5-5" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-5-6" name = "__codelineno-5-6" href = "#__codelineno-5-6" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 2< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-7" name = "__codelineno-5-7" href = "#__codelineno-5-7" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-8" name = "__codelineno-5-8" href = "#__codelineno-5-8" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 4< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-9" name = "__codelineno-5-9" href = "#__codelineno-5-9" > < / a > < span class = "c1" > // 请注意， ， < / span >
< a id = "__codelineno-5-10" name = "__codelineno-5-10" href = "#__codelineno-5-10" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > unshift< / span > < span class = "p" > (< / span > < span class = "mf" > 3< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-11" name = "__codelineno-5-11" href = "#__codelineno-5-11" > < / a > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > unshift< / span > < span class = "p" > (< / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-12" name = "__codelineno-5-12" href = "#__codelineno-5-12" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列 deque = " < / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-13" name = "__codelineno-5-13" href = "#__codelineno-5-13" > < / a >
< a id = "__codelineno-5-14" name = "__codelineno-5-14" href = "#__codelineno-5-14" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-5-15" name = "__codelineno-5-15" href = "#__codelineno-5-15" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > [< / span > < span class = "mf" > 0< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-5-16" name = "__codelineno-5-16" href = "#__codelineno-5-16" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队首元素 peekFirst = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-17" name = "__codelineno-5-17" href = "#__codelineno-5-17" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > [< / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-5-18" name = "__codelineno-5-18" href = "#__codelineno-5-18" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队尾元素 peekLast = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-19" name = "__codelineno-5-19" href = "#__codelineno-5-19" > < / a >
< a id = "__codelineno-5-20" name = "__codelineno-5-20" href = "#__codelineno-5-20" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-5-21" name = "__codelineno-5-21" href = "#__codelineno-5-21" > < / a > < span class = "c1" > // 请注意， ， < / span >
< a id = "__codelineno-5-22" name = "__codelineno-5-22" href = "#__codelineno-5-22" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > popFront< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > shift< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kr" > as< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-5-23" name = "__codelineno-5-23" href = "#__codelineno-5-23" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队首出队元素 popFront = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > popFront< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s2" > " ，队首出队后 deque = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-24" name = "__codelineno-5-24" href = "#__codelineno-5-24" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > popBack< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kr" > as< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-5-25" name = "__codelineno-5-25" href = "#__codelineno-5-25" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 队尾出队元素 popBack = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > popBack< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s2" > " ，队尾出队后 deque = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-26" name = "__codelineno-5-26" href = "#__codelineno-5-26" > < / a >
< a id = "__codelineno-5-27" name = "__codelineno-5-27" href = "#__codelineno-5-27" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-5-28" name = "__codelineno-5-28" href = "#__codelineno-5-28" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > deque< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-5-29" name = "__codelineno-5-29" href = "#__codelineno-5-29" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列长度 size = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-30" name = "__codelineno-5-30" href = "#__codelineno-5-30" > < / a >
< a id = "__codelineno-5-31" name = "__codelineno-5-31" href = "#__codelineno-5-31" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-5-32" name = "__codelineno-5-32" href = "#__codelineno-5-32" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-5-33" name = "__codelineno-5-33" href = "#__codelineno-5-33" > < / a > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列是否为空 = " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > );< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-04-18 20:19:15 +08:00
< div class = "highlight" > < span class = "filename" > deque.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-6-1" name = "__codelineno-6-1" href = "#__codelineno-6-1" > < / a > < span class = "c1" > // C 未提供内置双向队列< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque.cs< / span > < pre > < span > < / span > < code > < a id = "__codelineno-7-1" name = "__codelineno-7-1" href = "#__codelineno-7-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-7-2" name = "__codelineno-7-2" href = "#__codelineno-7-2" > < / a > < span class = "c1" > // 在 C# 中，将链表 LinkedList 看作双向队列来使用< / span >
< a id = "__codelineno-7-3" name = "__codelineno-7-3" href = "#__codelineno-7-3" > < / a > < span class = "n" > LinkedList< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > LinkedList< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "p" > ();< / span >
< a id = "__codelineno-7-4" name = "__codelineno-7-4" href = "#__codelineno-7-4" > < / a >
< a id = "__codelineno-7-5" name = "__codelineno-7-5" href = "#__codelineno-7-5" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-7-6" name = "__codelineno-7-6" href = "#__codelineno-7-6" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > AddLast< / span > < span class = "p" > (< / span > < span class = "m" > 2< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队尾< / span >
< a id = "__codelineno-7-7" name = "__codelineno-7-7" href = "#__codelineno-7-7" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > AddLast< / span > < span class = "p" > (< / span > < span class = "m" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-8" name = "__codelineno-7-8" href = "#__codelineno-7-8" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > AddLast< / span > < span class = "p" > (< / span > < span class = "m" > 4< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-9" name = "__codelineno-7-9" href = "#__codelineno-7-9" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > AddFirst< / span > < span class = "p" > (< / span > < span class = "m" > 3< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队首< / span >
< a id = "__codelineno-7-10" name = "__codelineno-7-10" href = "#__codelineno-7-10" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > AddFirst< / span > < span class = "p" > (< / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-11" name = "__codelineno-7-11" href = "#__codelineno-7-11" > < / a >
< a id = "__codelineno-7-12" name = "__codelineno-7-12" href = "#__codelineno-7-12" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-7-13" name = "__codelineno-7-13" href = "#__codelineno-7-13" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > First< / span > < span class = "p" > .< / span > < span class = "n" > Value< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素< / span >
< a id = "__codelineno-7-14" name = "__codelineno-7-14" href = "#__codelineno-7-14" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > Last< / span > < span class = "p" > .< / span > < span class = "n" > Value< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素< / span >
< a id = "__codelineno-7-15" name = "__codelineno-7-15" href = "#__codelineno-7-15" > < / a >
< a id = "__codelineno-7-16" name = "__codelineno-7-16" href = "#__codelineno-7-16" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-7-17" name = "__codelineno-7-17" href = "#__codelineno-7-17" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > RemoveFirst< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素出队< / span >
< a id = "__codelineno-7-18" name = "__codelineno-7-18" href = "#__codelineno-7-18" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > RemoveLast< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素出队< / span >
< a id = "__codelineno-7-19" name = "__codelineno-7-19" href = "#__codelineno-7-19" > < / a >
< a id = "__codelineno-7-20" name = "__codelineno-7-20" href = "#__codelineno-7-20" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-7-21" name = "__codelineno-7-21" href = "#__codelineno-7-21" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > Count< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-22" name = "__codelineno-7-22" href = "#__codelineno-7-22" > < / a >
< a id = "__codelineno-7-23" name = "__codelineno-7-23" href = "#__codelineno-7-23" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-7-24" name = "__codelineno-7-24" href = "#__codelineno-7-24" > < / a > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > Count< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque.swift< / span > < pre > < span > < / span > < code > < a id = "__codelineno-8-1" name = "__codelineno-8-1" href = "#__codelineno-8-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-8-2" name = "__codelineno-8-2" href = "#__codelineno-8-2" > < / a > < span class = "c1" > // Swift 没有内置的双向队列类，可以把 Array 当作双向队列来使用< / span >
< a id = "__codelineno-8-3" name = "__codelineno-8-3" href = "#__codelineno-8-3" > < / a > < span class = "kd" > var< / span > < span class = "nv" > deque< / span > < span class = "p" > :< / span > < span class = "p" > [< / span > < span class = "nb" > Int< / span > < span class = "p" > ]< / span > < span class = "p" > =< / span > < span class = "p" > []< / span >
< a id = "__codelineno-8-4" name = "__codelineno-8-4" href = "#__codelineno-8-4" > < / a >
< a id = "__codelineno-8-5" name = "__codelineno-8-5" href = "#__codelineno-8-5" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-8-6" name = "__codelineno-8-6" href = "#__codelineno-8-6" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "c1" > // 添加至队尾< / span >
< a id = "__codelineno-8-7" name = "__codelineno-8-7" href = "#__codelineno-8-7" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 5< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-8" name = "__codelineno-8-8" href = "#__codelineno-8-8" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-9" name = "__codelineno-8-9" href = "#__codelineno-8-9" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "bp" > insert< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > ,< / span > < span class = "n" > at< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > )< / span > < span class = "c1" > // 添加至队首< / span >
< a id = "__codelineno-8-10" name = "__codelineno-8-10" href = "#__codelineno-8-10" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "bp" > insert< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span > < span class = "n" > at< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-11" name = "__codelineno-8-11" href = "#__codelineno-8-11" > < / a >
< a id = "__codelineno-8-12" name = "__codelineno-8-12" href = "#__codelineno-8-12" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-8-13" name = "__codelineno-8-13" href = "#__codelineno-8-13" > < / a > < span class = "kd" > let< / span > < span class = "nv" > peekFirst< / span > < span class = "p" > =< / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "bp" > first< / span > < span class = "p" > !< / span > < span class = "c1" > // 队首元素< / span >
< a id = "__codelineno-8-14" name = "__codelineno-8-14" href = "#__codelineno-8-14" > < / a > < span class = "kd" > let< / span > < span class = "nv" > peekLast< / span > < span class = "p" > =< / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "bp" > last< / span > < span class = "p" > !< / span > < span class = "c1" > // 队尾元素< / span >
< a id = "__codelineno-8-15" name = "__codelineno-8-15" href = "#__codelineno-8-15" > < / a >
< a id = "__codelineno-8-16" name = "__codelineno-8-16" href = "#__codelineno-8-16" > < / a > < span class = "cm" > /* 元素出队 */< / span >
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< a id = "__codelineno-8-17" name = "__codelineno-8-17" href = "#__codelineno-8-17" > < / a > < span class = "c1" > // 使用 Array 模拟时 popFirst 的复杂度为 O(n)< / span >
< a id = "__codelineno-8-18" name = "__codelineno-8-18" href = "#__codelineno-8-18" > < / a > < span class = "kd" > let< / span > < span class = "nv" > popFirst< / span > < span class = "p" > =< / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > removeFirst< / span > < span class = "p" > ()< / span > < span class = "c1" > // 队首元素出队< / span >
< a id = "__codelineno-8-19" name = "__codelineno-8-19" href = "#__codelineno-8-19" > < / a > < span class = "kd" > let< / span > < span class = "nv" > popLast< / span > < span class = "p" > =< / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "bp" > removeLast< / span > < span class = "p" > ()< / span > < span class = "c1" > // 队尾元素出队< / span >
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< a id = "__codelineno-8-20" name = "__codelineno-8-20" href = "#__codelineno-8-20" > < / a >
< a id = "__codelineno-8-21" name = "__codelineno-8-21" href = "#__codelineno-8-21" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-8-22" name = "__codelineno-8-22" href = "#__codelineno-8-22" > < / a > < span class = "kd" > let< / span > < span class = "nv" > size< / span > < span class = "p" > =< / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "bp" > count< / span >
< a id = "__codelineno-8-23" name = "__codelineno-8-23" href = "#__codelineno-8-23" > < / a >
< a id = "__codelineno-8-24" name = "__codelineno-8-24" href = "#__codelineno-8-24" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-8-25" name = "__codelineno-8-25" href = "#__codelineno-8-25" > < / a > < span class = "kd" > let< / span > < span class = "nv" > isEmpty< / span > < span class = "p" > =< / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "bp" > isEmpty< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > deque.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-9-1" name = "__codelineno-9-1" href = "#__codelineno-9-1" > < / a >
< / code > < / pre > < / div >
< / div >
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< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > deque.dart< / span > < pre > < span > < / span > < code > < a id = "__codelineno-10-1" name = "__codelineno-10-1" href = "#__codelineno-10-1" > < / a > < span class = "cm" > /* 初始化双向队列 */< / span >
< a id = "__codelineno-10-2" name = "__codelineno-10-2" href = "#__codelineno-10-2" > < / a > < span class = "c1" > // 在 Dart 中， < / span >
< a id = "__codelineno-10-3" name = "__codelineno-10-3" href = "#__codelineno-10-3" > < / a > < span class = "n" > Queue< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > Queue< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "p" > ();< / span >
< a id = "__codelineno-10-4" name = "__codelineno-10-4" href = "#__codelineno-10-4" > < / a >
< a id = "__codelineno-10-5" name = "__codelineno-10-5" href = "#__codelineno-10-5" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-10-6" name = "__codelineno-10-6" href = "#__codelineno-10-6" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > addLast< / span > < span class = "p" > (< / span > < span class = "m" > 2< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队尾< / span >
< a id = "__codelineno-10-7" name = "__codelineno-10-7" href = "#__codelineno-10-7" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > addLast< / span > < span class = "p" > (< / span > < span class = "m" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-8" name = "__codelineno-10-8" href = "#__codelineno-10-8" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > addLast< / span > < span class = "p" > (< / span > < span class = "m" > 4< / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-9" name = "__codelineno-10-9" href = "#__codelineno-10-9" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > addFirst< / span > < span class = "p" > (< / span > < span class = "m" > 3< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 添加至队首< / span >
< a id = "__codelineno-10-10" name = "__codelineno-10-10" href = "#__codelineno-10-10" > < / a > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > addFirst< / span > < span class = "p" > (< / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-11" name = "__codelineno-10-11" href = "#__codelineno-10-11" > < / a >
< a id = "__codelineno-10-12" name = "__codelineno-10-12" href = "#__codelineno-10-12" > < / a > < span class = "cm" > /* 访问元素 */< / span >
< a id = "__codelineno-10-13" name = "__codelineno-10-13" href = "#__codelineno-10-13" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > first< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素< / span >
< a id = "__codelineno-10-14" name = "__codelineno-10-14" href = "#__codelineno-10-14" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > last< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素< / span >
< a id = "__codelineno-10-15" name = "__codelineno-10-15" href = "#__codelineno-10-15" > < / a >
< a id = "__codelineno-10-16" name = "__codelineno-10-16" href = "#__codelineno-10-16" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-10-17" name = "__codelineno-10-17" href = "#__codelineno-10-17" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > removeFirst< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队首元素出队< / span >
< a id = "__codelineno-10-18" name = "__codelineno-10-18" href = "#__codelineno-10-18" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > removeLast< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "c1" > // 队尾元素出队< / span >
< a id = "__codelineno-10-19" name = "__codelineno-10-19" href = "#__codelineno-10-19" > < / a >
< a id = "__codelineno-10-20" name = "__codelineno-10-20" href = "#__codelineno-10-20" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-10-21" name = "__codelineno-10-21" href = "#__codelineno-10-21" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-22" name = "__codelineno-10-22" href = "#__codelineno-10-22" > < / a >
< a id = "__codelineno-10-23" name = "__codelineno-10-23" href = "#__codelineno-10-23" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-10-24" name = "__codelineno-10-24" href = "#__codelineno-10-24" > < / a > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > .< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ;< / span > < span class = "n" > W< / span >
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< / code > < / pre > < / div >
< / div >
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< / div >
< / div >
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< h2 id = "532" > 5.3.2. 双向队列实现 *< a class = "headerlink" href = "#532" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 双向队列的实现与队列类似，可以选择链表或数组作为底层数据结构。< / p >
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< h3 id = "_1" > 基于双向链表的实现< a class = "headerlink" href = "#_1" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > 回顾上一节内容，我们使用普通单向链表来实现队列，因为它可以方便地删除头节点（对应出队操作）和在尾节点后添加新节点（对应入队操作）。< / p >
< p > 对于双向队列而言，头部和尾部都可以执行入队和出队操作。换句话说，双向队列需要实现另一个对称方向的操作。为此，我们采用「双向链表」作为双向队列的底层数据结构。< / p >
< p > 我们将双向链表的头节点和尾节点视为双向队列的队首和队尾，同时实现在两端添加和删除节点的功能。< / p >
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< div class = "tabbed-set tabbed-alternate" data-tabs = "2:5" > < input checked = "checked" id = "__tabbed_2_1" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_2" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_3" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_4" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_5" name = "__tabbed_2" type = "radio" / > < div class = "tabbed-labels" > < label for = "__tabbed_2_1" > LinkedListDeque< / label > < label for = "__tabbed_2_2" > pushLast()< / label > < label for = "__tabbed_2_3" > pushFirst()< / label > < label for = "__tabbed_2_4" > popLast()< / label > < label for = "__tabbed_2_5" > popFirst()< / label > < / div >
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< div class = "tabbed-content" >
< div class = "tabbed-block" >
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< p > < img alt = "基于链表实现双向队列的入队出队操作" src = "../deque.assets/linkedlist_deque.png" / > < / p >
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< / div >
< div class = "tabbed-block" >
< p > < img alt = "linkedlist_deque_push_last" src = "../deque.assets/linkedlist_deque_push_last.png" / > < / p >
< / div >
< div class = "tabbed-block" >
< p > < img alt = "linkedlist_deque_push_first" src = "../deque.assets/linkedlist_deque_push_first.png" / > < / p >
< / div >
< div class = "tabbed-block" >
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< p > < img alt = "linkedlist_deque_pop_last" src = "../deque.assets/linkedlist_deque_pop_last.png" / > < / p >
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< / div >
< div class = "tabbed-block" >
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< p > < img alt = "linkedlist_deque_pop_first" src = "../deque.assets/linkedlist_deque_pop_first.png" / > < / p >
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< / div >
< / div >
< / div >
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< p > 以下是具体实现代码。< / p >
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< div class = "tabbed-set tabbed-alternate" data-tabs = "3:11" > < input checked = "checked" id = "__tabbed_3_1" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_2" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_3" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_4" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_5" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_6" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_7" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_8" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_9" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_10" name = "__tabbed_3" type = "radio" / > < input id = "__tabbed_3_11" name = "__tabbed_3" type = "radio" / > < div class = "tabbed-labels" > < label for = "__tabbed_3_1" > Java< / label > < label for = "__tabbed_3_2" > C++< / label > < label for = "__tabbed_3_3" > Python< / label > < label for = "__tabbed_3_4" > Go< / label > < label for = "__tabbed_3_5" > JavaScript< / label > < label for = "__tabbed_3_6" > TypeScript< / label > < label for = "__tabbed_3_7" > C< / label > < label for = "__tabbed_3_8" > C#< / label > < label for = "__tabbed_3_9" > Swift< / label > < label for = "__tabbed_3_10" > Zig< / label > < label for = "__tabbed_3_11" > Dart< / label > < / div >
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< div class = "tabbed-content" >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > linkedlist_deque.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-11-1" name = "__codelineno-11-1" href = "#__codelineno-11-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
< a id = "__codelineno-11-2" name = "__codelineno-11-2" href = "#__codelineno-11-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > ListNode< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-3" name = "__codelineno-11-3" href = "#__codelineno-11-3" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-11-4" name = "__codelineno-11-4" href = "#__codelineno-11-4" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点引用（指针）< / span >
< a id = "__codelineno-11-5" name = "__codelineno-11-5" href = "#__codelineno-11-5" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点引用（指针）< / span >
< a id = "__codelineno-11-6" name = "__codelineno-11-6" href = "#__codelineno-11-6" > < / a >
< a id = "__codelineno-11-7" name = "__codelineno-11-7" href = "#__codelineno-11-7" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-8" name = "__codelineno-11-8" href = "#__codelineno-11-8" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-9" name = "__codelineno-11-9" href = "#__codelineno-11-9" > < / a > < span class = "w" > < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-10" name = "__codelineno-11-10" href = "#__codelineno-11-10" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-11" name = "__codelineno-11-11" href = "#__codelineno-11-11" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-11-12" name = "__codelineno-11-12" href = "#__codelineno-11-12" > < / a >
< a id = "__codelineno-11-13" name = "__codelineno-11-13" href = "#__codelineno-11-13" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-11-14" name = "__codelineno-11-14" href = "#__codelineno-11-14" > < / a > < span class = "kd" > class< / span > < span class = "nc" > LinkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-15" name = "__codelineno-11-15" href = "#__codelineno-11-15" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 front ，尾节点 rear< / span >
< a id = "__codelineno-11-16" name = "__codelineno-11-16" href = "#__codelineno-11-16" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-11-17" name = "__codelineno-11-17" href = "#__codelineno-11-17" > < / a >
< a id = "__codelineno-11-18" name = "__codelineno-11-18" href = "#__codelineno-11-18" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "nf" > LinkedListDeque< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-19" name = "__codelineno-11-19" href = "#__codelineno-11-19" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-20" name = "__codelineno-11-20" href = "#__codelineno-11-20" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-21" name = "__codelineno-11-21" href = "#__codelineno-11-21" > < / a >
< a id = "__codelineno-11-22" name = "__codelineno-11-22" href = "#__codelineno-11-22" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-11-23" name = "__codelineno-11-23" href = "#__codelineno-11-23" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-24" name = "__codelineno-11-24" href = "#__codelineno-11-24" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-25" name = "__codelineno-11-25" href = "#__codelineno-11-25" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-26" name = "__codelineno-11-26" href = "#__codelineno-11-26" > < / a >
< a id = "__codelineno-11-27" name = "__codelineno-11-27" href = "#__codelineno-11-27" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-11-28" name = "__codelineno-11-28" href = "#__codelineno-11-28" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-29" name = "__codelineno-11-29" href = "#__codelineno-11-29" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-11-30" name = "__codelineno-11-30" href = "#__codelineno-11-30" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-31" name = "__codelineno-11-31" href = "#__codelineno-11-31" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-11-32" name = "__codelineno-11-32" href = "#__codelineno-11-32" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队操作 */< / span >
< a id = "__codelineno-11-33" name = "__codelineno-11-33" href = "#__codelineno-11-33" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > push< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-34" name = "__codelineno-11-34" href = "#__codelineno-11-34" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-35" name = "__codelineno-11-35" href = "#__codelineno-11-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-11-36" name = "__codelineno-11-36" href = "#__codelineno-11-36" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-11-37" name = "__codelineno-11-37" href = "#__codelineno-11-37" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-38" name = "__codelineno-11-38" href = "#__codelineno-11-38" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首入队操作< / span >
< a id = "__codelineno-11-39" name = "__codelineno-11-39" href = "#__codelineno-11-39" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-40" name = "__codelineno-11-40" href = "#__codelineno-11-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-11-41" name = "__codelineno-11-41" href = "#__codelineno-11-41" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "na" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-42" name = "__codelineno-11-42" href = "#__codelineno-11-42" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "na" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-43" name = "__codelineno-11-43" href = "#__codelineno-11-43" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-11-44" name = "__codelineno-11-44" href = "#__codelineno-11-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾入队操作< / span >
< a id = "__codelineno-11-45" name = "__codelineno-11-45" href = "#__codelineno-11-45" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-46" name = "__codelineno-11-46" href = "#__codelineno-11-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-11-47" name = "__codelineno-11-47" href = "#__codelineno-11-47" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "na" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-48" name = "__codelineno-11-48" href = "#__codelineno-11-48" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "na" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-49" name = "__codelineno-11-49" href = "#__codelineno-11-49" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-11-50" name = "__codelineno-11-50" href = "#__codelineno-11-50" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-51" name = "__codelineno-11-51" href = "#__codelineno-11-51" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-11-52" name = "__codelineno-11-52" href = "#__codelineno-11-52" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-53" name = "__codelineno-11-53" href = "#__codelineno-11-53" > < / a >
< a id = "__codelineno-11-54" name = "__codelineno-11-54" href = "#__codelineno-11-54" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-11-55" name = "__codelineno-11-55" href = "#__codelineno-11-55" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-56" name = "__codelineno-11-56" href = "#__codelineno-11-56" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kc" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-57" name = "__codelineno-11-57" href = "#__codelineno-11-57" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-58" name = "__codelineno-11-58" href = "#__codelineno-11-58" > < / a >
< a id = "__codelineno-11-59" name = "__codelineno-11-59" href = "#__codelineno-11-59" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-11-60" name = "__codelineno-11-60" href = "#__codelineno-11-60" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-61" name = "__codelineno-11-61" href = "#__codelineno-11-61" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kc" > false< / span > < span class = "p" > );< / span >
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< a id = "__codelineno-11-62" name = "__codelineno-11-62" href = "#__codelineno-11-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-63" name = "__codelineno-11-63" href = "#__codelineno-11-63" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-11-64" name = "__codelineno-11-64" href = "#__codelineno-11-64" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队操作 */< / span >
< a id = "__codelineno-11-65" name = "__codelineno-11-65" href = "#__codelineno-11-65" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "n" > Integer< / span > < span class = "w" > < / span > < span class = "nf" > pop< / span > < span class = "p" > (< / span > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-66" name = "__codelineno-11-66" href = "#__codelineno-11-66" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若队列为空，直接返回 null< / span >
< a id = "__codelineno-11-67" name = "__codelineno-11-67" href = "#__codelineno-11-67" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-11-68" name = "__codelineno-11-68" href = "#__codelineno-11-68" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-69" name = "__codelineno-11-69" href = "#__codelineno-11-69" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-70" name = "__codelineno-11-70" href = "#__codelineno-11-70" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首出队操作< / span >
< a id = "__codelineno-11-71" name = "__codelineno-11-71" href = "#__codelineno-11-71" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-72" name = "__codelineno-11-72" href = "#__codelineno-11-72" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存头节点值< / span >
< a id = "__codelineno-11-73" name = "__codelineno-11-73" href = "#__codelineno-11-73" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头节点< / span >
< a id = "__codelineno-11-74" name = "__codelineno-11-74" href = "#__codelineno-11-74" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "na" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-75" name = "__codelineno-11-75" href = "#__codelineno-11-75" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-76" name = "__codelineno-11-76" href = "#__codelineno-11-76" > < / a > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > .< / span > < span class = "na" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-77" name = "__codelineno-11-77" href = "#__codelineno-11-77" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "na" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-78" name = "__codelineno-11-78" href = "#__codelineno-11-78" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-79" name = "__codelineno-11-79" href = "#__codelineno-11-79" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-11-80" name = "__codelineno-11-80" href = "#__codelineno-11-80" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾出队操作< / span >
< a id = "__codelineno-11-81" name = "__codelineno-11-81" href = "#__codelineno-11-81" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-82" name = "__codelineno-11-82" href = "#__codelineno-11-82" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存尾节点值< / span >
< a id = "__codelineno-11-83" name = "__codelineno-11-83" href = "#__codelineno-11-83" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除尾节点< / span >
< a id = "__codelineno-11-84" name = "__codelineno-11-84" href = "#__codelineno-11-84" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "na" > prev< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-85" name = "__codelineno-11-85" href = "#__codelineno-11-85" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-86" name = "__codelineno-11-86" href = "#__codelineno-11-86" > < / a > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > .< / span > < span class = "na" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-87" name = "__codelineno-11-87" href = "#__codelineno-11-87" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "na" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-88" name = "__codelineno-11-88" href = "#__codelineno-11-88" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-89" name = "__codelineno-11-89" href = "#__codelineno-11-89" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-11-90" name = "__codelineno-11-90" href = "#__codelineno-11-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-91" name = "__codelineno-11-91" href = "#__codelineno-11-91" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-11-92" name = "__codelineno-11-92" href = "#__codelineno-11-92" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-93" name = "__codelineno-11-93" href = "#__codelineno-11-93" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-94" name = "__codelineno-11-94" href = "#__codelineno-11-94" > < / a >
< a id = "__codelineno-11-95" name = "__codelineno-11-95" href = "#__codelineno-11-95" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-11-96" name = "__codelineno-11-96" href = "#__codelineno-11-96" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "n" > Integer< / span > < span class = "w" > < / span > < span class = "nf" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-97" name = "__codelineno-11-97" href = "#__codelineno-11-97" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-98" name = "__codelineno-11-98" href = "#__codelineno-11-98" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-99" name = "__codelineno-11-99" href = "#__codelineno-11-99" > < / a >
< a id = "__codelineno-11-100" name = "__codelineno-11-100" href = "#__codelineno-11-100" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-11-101" name = "__codelineno-11-101" href = "#__codelineno-11-101" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "n" > Integer< / span > < span class = "w" > < / span > < span class = "nf" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-102" name = "__codelineno-11-102" href = "#__codelineno-11-102" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-103" name = "__codelineno-11-103" href = "#__codelineno-11-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-104" name = "__codelineno-11-104" href = "#__codelineno-11-104" > < / a >
< a id = "__codelineno-11-105" name = "__codelineno-11-105" href = "#__codelineno-11-105" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-11-106" name = "__codelineno-11-106" href = "#__codelineno-11-106" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "n" > Integer< / span > < span class = "w" > < / span > < span class = "nf" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-107" name = "__codelineno-11-107" href = "#__codelineno-11-107" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-108" name = "__codelineno-11-108" href = "#__codelineno-11-108" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-109" name = "__codelineno-11-109" href = "#__codelineno-11-109" > < / a >
< a id = "__codelineno-11-110" name = "__codelineno-11-110" href = "#__codelineno-11-110" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-11-111" name = "__codelineno-11-111" href = "#__codelineno-11-111" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "n" > Integer< / span > < span class = "w" > < / span > < span class = "nf" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-112" name = "__codelineno-11-112" href = "#__codelineno-11-112" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-113" name = "__codelineno-11-113" href = "#__codelineno-11-113" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-114" name = "__codelineno-11-114" href = "#__codelineno-11-114" > < / a >
< a id = "__codelineno-11-115" name = "__codelineno-11-115" href = "#__codelineno-11-115" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-11-116" name = "__codelineno-11-116" href = "#__codelineno-11-116" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > []< / span > < span class = "w" > < / span > < span class = "nf" > toArray< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-117" name = "__codelineno-11-117" href = "#__codelineno-11-117" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-118" name = "__codelineno-11-118" href = "#__codelineno-11-118" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > []< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > [< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-119" name = "__codelineno-11-119" href = "#__codelineno-11-119" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "na" > length< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-120" name = "__codelineno-11-120" href = "#__codelineno-11-120" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "o" > [< / span > < span class = "n" > i< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-121" name = "__codelineno-11-121" href = "#__codelineno-11-121" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "na" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-122" name = "__codelineno-11-122" href = "#__codelineno-11-122" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-123" name = "__codelineno-11-123" href = "#__codelineno-11-123" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-124" name = "__codelineno-11-124" href = "#__codelineno-11-124" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-125" name = "__codelineno-11-125" href = "#__codelineno-11-125" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > linkedlist_deque.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-12-1" name = "__codelineno-12-1" href = "#__codelineno-12-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
< a id = "__codelineno-12-2" name = "__codelineno-12-2" href = "#__codelineno-12-2" > < / a > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-3" name = "__codelineno-12-3" href = "#__codelineno-12-3" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-12-4" name = "__codelineno-12-4" href = "#__codelineno-12-4" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点指针< / span >
< a id = "__codelineno-12-5" name = "__codelineno-12-5" href = "#__codelineno-12-5" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点指针< / span >
< a id = "__codelineno-12-6" name = "__codelineno-12-6" href = "#__codelineno-12-6" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > (< / span > < span class = "n" > val< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > prev< / span > < span class = "p" > (< / span > < span class = "k" > nullptr< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > next< / span > < span class = "p" > (< / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-7" name = "__codelineno-12-7" href = "#__codelineno-12-7" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-8" name = "__codelineno-12-8" href = "#__codelineno-12-8" > < / a > < span class = "p" > };< / span >
2023-04-09 05:12:29 +08:00
< a id = "__codelineno-12-9" name = "__codelineno-12-9" href = "#__codelineno-12-9" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-12-10" name = "__codelineno-12-10" href = "#__codelineno-12-10" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-12-11" name = "__codelineno-12-11" href = "#__codelineno-12-11" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > LinkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-12" name = "__codelineno-12-12" href = "#__codelineno-12-12" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "o" > :< / span >
< a id = "__codelineno-12-13" name = "__codelineno-12-13" href = "#__codelineno-12-13" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > front< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 front ，尾节点 rear< / span >
< a id = "__codelineno-12-14" name = "__codelineno-12-14" href = "#__codelineno-12-14" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-12-15" name = "__codelineno-12-15" href = "#__codelineno-12-15" > < / a >
< a id = "__codelineno-12-16" name = "__codelineno-12-16" href = "#__codelineno-12-16" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "o" > :< / span >
< a id = "__codelineno-12-17" name = "__codelineno-12-17" href = "#__codelineno-12-17" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-12-18" name = "__codelineno-12-18" href = "#__codelineno-12-18" > < / a > < span class = "w" > < / span > < span class = "n" > LinkedListDeque< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > (< / span > < span class = "k" > nullptr< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > (< / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-19" name = "__codelineno-12-19" href = "#__codelineno-12-19" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-20" name = "__codelineno-12-20" href = "#__codelineno-12-20" > < / a >
< a id = "__codelineno-12-21" name = "__codelineno-12-21" href = "#__codelineno-12-21" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 析构方法 */< / span >
< a id = "__codelineno-12-22" name = "__codelineno-12-22" href = "#__codelineno-12-22" > < / a > < span class = "w" > < / span > < span class = "o" > ~< / span > < span class = "n" > LinkedListDeque< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-23" name = "__codelineno-12-23" href = "#__codelineno-12-23" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历链表删除节点，释放内存< / span >
< a id = "__codelineno-12-24" name = "__codelineno-12-24" href = "#__codelineno-12-24" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > pre< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > cur< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-25" name = "__codelineno-12-25" href = "#__codelineno-12-25" > < / a > < span class = "w" > < / span > < span class = "k" > while< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > cur< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-26" name = "__codelineno-12-26" href = "#__codelineno-12-26" > < / a > < span class = "w" > < / span > < span class = "n" > pre< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > cur< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-27" name = "__codelineno-12-27" href = "#__codelineno-12-27" > < / a > < span class = "w" > < / span > < span class = "n" > cur< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > cur< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-28" name = "__codelineno-12-28" href = "#__codelineno-12-28" > < / a > < span class = "w" > < / span > < span class = "k" > delete< / span > < span class = "w" > < / span > < span class = "n" > pre< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-29" name = "__codelineno-12-29" href = "#__codelineno-12-29" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-30" name = "__codelineno-12-30" href = "#__codelineno-12-30" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-31" name = "__codelineno-12-31" href = "#__codelineno-12-31" > < / a >
< a id = "__codelineno-12-32" name = "__codelineno-12-32" href = "#__codelineno-12-32" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-12-33" name = "__codelineno-12-33" href = "#__codelineno-12-33" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-34" name = "__codelineno-12-34" href = "#__codelineno-12-34" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-35" name = "__codelineno-12-35" href = "#__codelineno-12-35" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-36" name = "__codelineno-12-36" href = "#__codelineno-12-36" > < / a >
< a id = "__codelineno-12-37" name = "__codelineno-12-37" href = "#__codelineno-12-37" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-12-38" name = "__codelineno-12-38" href = "#__codelineno-12-38" > < / a > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-39" name = "__codelineno-12-39" href = "#__codelineno-12-39" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-40" name = "__codelineno-12-40" href = "#__codelineno-12-40" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-41" name = "__codelineno-12-41" href = "#__codelineno-12-41" > < / a >
< a id = "__codelineno-12-42" name = "__codelineno-12-42" href = "#__codelineno-12-42" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队操作 */< / span >
< a id = "__codelineno-12-43" name = "__codelineno-12-43" href = "#__codelineno-12-43" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-44" name = "__codelineno-12-44" href = "#__codelineno-12-44" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-45" name = "__codelineno-12-45" href = "#__codelineno-12-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-12-46" name = "__codelineno-12-46" href = "#__codelineno-12-46" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-12-47" name = "__codelineno-12-47" href = "#__codelineno-12-47" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-48" name = "__codelineno-12-48" href = "#__codelineno-12-48" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首入队操作< / span >
< a id = "__codelineno-12-49" name = "__codelineno-12-49" href = "#__codelineno-12-49" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-50" name = "__codelineno-12-50" href = "#__codelineno-12-50" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-12-51" name = "__codelineno-12-51" href = "#__codelineno-12-51" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-52" name = "__codelineno-12-52" href = "#__codelineno-12-52" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-53" name = "__codelineno-12-53" href = "#__codelineno-12-53" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-12-54" name = "__codelineno-12-54" href = "#__codelineno-12-54" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾入队操作< / span >
< a id = "__codelineno-12-55" name = "__codelineno-12-55" href = "#__codelineno-12-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-56" name = "__codelineno-12-56" href = "#__codelineno-12-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-12-57" name = "__codelineno-12-57" href = "#__codelineno-12-57" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-58" name = "__codelineno-12-58" href = "#__codelineno-12-58" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-59" name = "__codelineno-12-59" href = "#__codelineno-12-59" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-12-60" name = "__codelineno-12-60" href = "#__codelineno-12-60" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-61" name = "__codelineno-12-61" href = "#__codelineno-12-61" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-12-62" name = "__codelineno-12-62" href = "#__codelineno-12-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-63" name = "__codelineno-12-63" href = "#__codelineno-12-63" > < / a >
< a id = "__codelineno-12-64" name = "__codelineno-12-64" href = "#__codelineno-12-64" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-12-65" name = "__codelineno-12-65" href = "#__codelineno-12-65" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-66" name = "__codelineno-12-66" href = "#__codelineno-12-66" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-67" name = "__codelineno-12-67" href = "#__codelineno-12-67" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-68" name = "__codelineno-12-68" href = "#__codelineno-12-68" > < / a >
< a id = "__codelineno-12-69" name = "__codelineno-12-69" href = "#__codelineno-12-69" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-12-70" name = "__codelineno-12-70" href = "#__codelineno-12-70" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-71" name = "__codelineno-12-71" href = "#__codelineno-12-71" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-72" name = "__codelineno-12-72" href = "#__codelineno-12-72" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-73" name = "__codelineno-12-73" href = "#__codelineno-12-73" > < / a >
< a id = "__codelineno-12-74" name = "__codelineno-12-74" href = "#__codelineno-12-74" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队操作 */< / span >
< a id = "__codelineno-12-75" name = "__codelineno-12-75" href = "#__codelineno-12-75" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-76" name = "__codelineno-12-76" href = "#__codelineno-12-76" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若队列为空，直接返回 -1< / span >
< a id = "__codelineno-12-77" name = "__codelineno-12-77" href = "#__codelineno-12-77" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-12-78" name = "__codelineno-12-78" href = "#__codelineno-12-78" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "mi" > -1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-79" name = "__codelineno-12-79" href = "#__codelineno-12-79" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-80" name = "__codelineno-12-80" href = "#__codelineno-12-80" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首出队操作< / span >
< a id = "__codelineno-12-81" name = "__codelineno-12-81" href = "#__codelineno-12-81" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-82" name = "__codelineno-12-82" href = "#__codelineno-12-82" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存头节点值< / span >
< a id = "__codelineno-12-83" name = "__codelineno-12-83" href = "#__codelineno-12-83" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头节点< / span >
< a id = "__codelineno-12-84" name = "__codelineno-12-84" href = "#__codelineno-12-84" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-85" name = "__codelineno-12-85" href = "#__codelineno-12-85" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-86" name = "__codelineno-12-86" href = "#__codelineno-12-86" > < / a > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-87" name = "__codelineno-12-87" href = "#__codelineno-12-87" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-88" name = "__codelineno-12-88" href = "#__codelineno-12-88" > < / a > < span class = "w" > < / span > < span class = "k" > delete< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-89" name = "__codelineno-12-89" href = "#__codelineno-12-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-90" name = "__codelineno-12-90" href = "#__codelineno-12-90" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-12-91" name = "__codelineno-12-91" href = "#__codelineno-12-91" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾出队操作< / span >
< a id = "__codelineno-12-92" name = "__codelineno-12-92" href = "#__codelineno-12-92" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-93" name = "__codelineno-12-93" href = "#__codelineno-12-93" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存尾节点值< / span >
< a id = "__codelineno-12-94" name = "__codelineno-12-94" href = "#__codelineno-12-94" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除尾节点< / span >
< a id = "__codelineno-12-95" name = "__codelineno-12-95" href = "#__codelineno-12-95" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-96" name = "__codelineno-12-96" href = "#__codelineno-12-96" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-97" name = "__codelineno-12-97" href = "#__codelineno-12-97" > < / a > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-98" name = "__codelineno-12-98" href = "#__codelineno-12-98" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-99" name = "__codelineno-12-99" href = "#__codelineno-12-99" > < / a > < span class = "w" > < / span > < span class = "k" > delete< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-100" name = "__codelineno-12-100" href = "#__codelineno-12-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-101" name = "__codelineno-12-101" href = "#__codelineno-12-101" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-12-102" name = "__codelineno-12-102" href = "#__codelineno-12-102" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-103" name = "__codelineno-12-103" href = "#__codelineno-12-103" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-12-104" name = "__codelineno-12-104" href = "#__codelineno-12-104" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-105" name = "__codelineno-12-105" href = "#__codelineno-12-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-106" name = "__codelineno-12-106" href = "#__codelineno-12-106" > < / a >
< a id = "__codelineno-12-107" name = "__codelineno-12-107" href = "#__codelineno-12-107" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-12-108" name = "__codelineno-12-108" href = "#__codelineno-12-108" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-109" name = "__codelineno-12-109" href = "#__codelineno-12-109" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "nb" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-110" name = "__codelineno-12-110" href = "#__codelineno-12-110" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-111" name = "__codelineno-12-111" href = "#__codelineno-12-111" > < / a >
< a id = "__codelineno-12-112" name = "__codelineno-12-112" href = "#__codelineno-12-112" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-12-113" name = "__codelineno-12-113" href = "#__codelineno-12-113" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-114" name = "__codelineno-12-114" href = "#__codelineno-12-114" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "nb" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-115" name = "__codelineno-12-115" href = "#__codelineno-12-115" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-116" name = "__codelineno-12-116" href = "#__codelineno-12-116" > < / a >
< a id = "__codelineno-12-117" name = "__codelineno-12-117" href = "#__codelineno-12-117" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-12-118" name = "__codelineno-12-118" href = "#__codelineno-12-118" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-119" name = "__codelineno-12-119" href = "#__codelineno-12-119" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "mi" > -1< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-120" name = "__codelineno-12-120" href = "#__codelineno-12-120" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-121" name = "__codelineno-12-121" href = "#__codelineno-12-121" > < / a >
< a id = "__codelineno-12-122" name = "__codelineno-12-122" href = "#__codelineno-12-122" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-12-123" name = "__codelineno-12-123" href = "#__codelineno-12-123" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-124" name = "__codelineno-12-124" href = "#__codelineno-12-124" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "mi" > -1< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-125" name = "__codelineno-12-125" href = "#__codelineno-12-125" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-126" name = "__codelineno-12-126" href = "#__codelineno-12-126" > < / a >
< a id = "__codelineno-12-127" name = "__codelineno-12-127" href = "#__codelineno-12-127" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-12-128" name = "__codelineno-12-128" href = "#__codelineno-12-128" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > toVector< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-129" name = "__codelineno-12-129" href = "#__codelineno-12-129" > < / a > < span class = "w" > < / span > < span class = "n" > DoublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-130" name = "__codelineno-12-130" href = "#__codelineno-12-130" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > (< / span > < span class = "n" > size< / span > < span class = "p" > ());< / span >
< a id = "__codelineno-12-131" name = "__codelineno-12-131" href = "#__codelineno-12-131" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > size< / span > < span class = "p" > ();< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-132" name = "__codelineno-12-132" href = "#__codelineno-12-132" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-133" name = "__codelineno-12-133" href = "#__codelineno-12-133" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-134" name = "__codelineno-12-134" href = "#__codelineno-12-134" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-135" name = "__codelineno-12-135" href = "#__codelineno-12-135" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-136" name = "__codelineno-12-136" href = "#__codelineno-12-136" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-137" name = "__codelineno-12-137" href = "#__codelineno-12-137" > < / a > < span class = "p" > };< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > linkedlist_deque.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-13-1" name = "__codelineno-13-1" href = "#__codelineno-13-1" > < / a > < span class = "k" > class< / span > < span class = "nc" > ListNode< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-2" name = "__codelineno-13-2" href = "#__codelineno-13-2" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 双向链表节点" " " < / span >
< a id = "__codelineno-13-3" name = "__codelineno-13-3" href = "#__codelineno-13-3" > < / a >
< a id = "__codelineno-13-4" name = "__codelineno-13-4" href = "#__codelineno-13-4" > < / a > < span class = "k" > def< / span > < span class = "fm" > __init__< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-5" name = "__codelineno-13-5" href = "#__codelineno-13-5" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 构造方法" " " < / span >
< a id = "__codelineno-13-6" name = "__codelineno-13-6" href = "#__codelineno-13-6" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "n" > val< / span >
< a id = "__codelineno-13-7" name = "__codelineno-13-7" href = "#__codelineno-13-7" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > next< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "o" > |< / span > < span class = "kc" > None< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span > < span class = "c1" > # 后继节点引用（指针）< / span >
< a id = "__codelineno-13-8" name = "__codelineno-13-8" href = "#__codelineno-13-8" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > prev< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "o" > |< / span > < span class = "kc" > None< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span > < span class = "c1" > # 前驱节点引用（指针）< / span >
< a id = "__codelineno-13-9" name = "__codelineno-13-9" href = "#__codelineno-13-9" > < / a >
< a id = "__codelineno-13-10" name = "__codelineno-13-10" href = "#__codelineno-13-10" > < / a > < span class = "k" > class< / span > < span class = "nc" > LinkedListDeque< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-11" name = "__codelineno-13-11" href = "#__codelineno-13-11" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 基于双向链表实现的双向队列" " " < / span >
< a id = "__codelineno-13-12" name = "__codelineno-13-12" href = "#__codelineno-13-12" > < / a >
< a id = "__codelineno-13-13" name = "__codelineno-13-13" href = "#__codelineno-13-13" > < / a > < span class = "k" > def< / span > < span class = "fm" > __init__< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-14" name = "__codelineno-13-14" href = "#__codelineno-13-14" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 构造方法" " " < / span >
< a id = "__codelineno-13-15" name = "__codelineno-13-15" href = "#__codelineno-13-15" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "o" > |< / span > < span class = "kc" > None< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span > < span class = "c1" > # 头节点 front< / span >
< a id = "__codelineno-13-16" name = "__codelineno-13-16" href = "#__codelineno-13-16" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "o" > |< / span > < span class = "kc" > None< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span > < span class = "c1" > # 尾节点 rear< / span >
< a id = "__codelineno-13-17" name = "__codelineno-13-17" href = "#__codelineno-13-17" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "mi" > 0< / span > < span class = "c1" > # 双向队列的长度< / span >
2023-03-01 22:22:09 +08:00
< a id = "__codelineno-13-18" name = "__codelineno-13-18" href = "#__codelineno-13-18" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-13-19" name = "__codelineno-13-19" href = "#__codelineno-13-19" > < / a > < span class = "k" > def< / span > < span class = "nf" > size< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-20" name = "__codelineno-13-20" href = "#__codelineno-13-20" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 获取双向队列的长度" " " < / span >
< a id = "__codelineno-13-21" name = "__codelineno-13-21" href = "#__codelineno-13-21" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span >
< a id = "__codelineno-13-22" name = "__codelineno-13-22" href = "#__codelineno-13-22" > < / a >
< a id = "__codelineno-13-23" name = "__codelineno-13-23" href = "#__codelineno-13-23" > < / a > < span class = "k" > def< / span > < span class = "nf" > is_empty< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > bool< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-24" name = "__codelineno-13-24" href = "#__codelineno-13-24" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 判断双向队列是否为空" " " < / span >
< a id = "__codelineno-13-25" name = "__codelineno-13-25" href = "#__codelineno-13-25" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "o" > ==< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-13-26" name = "__codelineno-13-26" href = "#__codelineno-13-26" > < / a >
< a id = "__codelineno-13-27" name = "__codelineno-13-27" href = "#__codelineno-13-27" > < / a > < span class = "k" > def< / span > < span class = "nf" > push< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > ,< / span > < span class = "n" > is_front< / span > < span class = "p" > :< / span > < span class = "nb" > bool< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-28" name = "__codelineno-13-28" href = "#__codelineno-13-28" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 入队操作" " " < / span >
< a id = "__codelineno-13-29" name = "__codelineno-13-29" href = "#__codelineno-13-29" > < / a > < span class = "n" > node< / span > < span class = "o" > =< / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-30" name = "__codelineno-13-30" href = "#__codelineno-13-30" > < / a > < span class = "c1" > # 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-13-31" name = "__codelineno-13-31" href = "#__codelineno-13-31" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > is_empty< / span > < span class = "p" > ():< / span >
< a id = "__codelineno-13-32" name = "__codelineno-13-32" href = "#__codelineno-13-32" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-13-33" name = "__codelineno-13-33" href = "#__codelineno-13-33" > < / a > < span class = "c1" > # 队首入队操作< / span >
< a id = "__codelineno-13-34" name = "__codelineno-13-34" href = "#__codelineno-13-34" > < / a > < span class = "k" > elif< / span > < span class = "n" > is_front< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-35" name = "__codelineno-13-35" href = "#__codelineno-13-35" > < / a > < span class = "c1" > # 将 node 添加至链表头部< / span >
< a id = "__codelineno-13-36" name = "__codelineno-13-36" href = "#__codelineno-13-36" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > .< / span > < span class = "n" > prev< / span > < span class = "o" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-13-37" name = "__codelineno-13-37" href = "#__codelineno-13-37" > < / a > < span class = "n" > node< / span > < span class = "o" > .< / span > < span class = "n" > next< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span >
< a id = "__codelineno-13-38" name = "__codelineno-13-38" href = "#__codelineno-13-38" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > =< / span > < span class = "n" > node< / span > < span class = "c1" > # 更新头节点< / span >
< a id = "__codelineno-13-39" name = "__codelineno-13-39" href = "#__codelineno-13-39" > < / a > < span class = "c1" > # 队尾入队操作< / span >
< a id = "__codelineno-13-40" name = "__codelineno-13-40" href = "#__codelineno-13-40" > < / a > < span class = "k" > else< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-41" name = "__codelineno-13-41" href = "#__codelineno-13-41" > < / a > < span class = "c1" > # 将 node 添加至链表尾部< / span >
< a id = "__codelineno-13-42" name = "__codelineno-13-42" href = "#__codelineno-13-42" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > .< / span > < span class = "n" > next< / span > < span class = "o" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-13-43" name = "__codelineno-13-43" href = "#__codelineno-13-43" > < / a > < span class = "n" > node< / span > < span class = "o" > .< / span > < span class = "n" > prev< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span >
< a id = "__codelineno-13-44" name = "__codelineno-13-44" href = "#__codelineno-13-44" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > =< / span > < span class = "n" > node< / span > < span class = "c1" > # 更新尾节点< / span >
< a id = "__codelineno-13-45" name = "__codelineno-13-45" href = "#__codelineno-13-45" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span > < span class = "c1" > # 更新队列长度< / span >
< a id = "__codelineno-13-46" name = "__codelineno-13-46" href = "#__codelineno-13-46" > < / a >
< a id = "__codelineno-13-47" name = "__codelineno-13-47" href = "#__codelineno-13-47" > < / a > < span class = "k" > def< / span > < span class = "nf" > push_first< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-48" name = "__codelineno-13-48" href = "#__codelineno-13-48" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队首入队" " " < / span >
< a id = "__codelineno-13-49" name = "__codelineno-13-49" href = "#__codelineno-13-49" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "kc" > True< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-50" name = "__codelineno-13-50" href = "#__codelineno-13-50" > < / a >
< a id = "__codelineno-13-51" name = "__codelineno-13-51" href = "#__codelineno-13-51" > < / a > < span class = "k" > def< / span > < span class = "nf" > push_last< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-52" name = "__codelineno-13-52" href = "#__codelineno-13-52" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队尾入队" " " < / span >
< a id = "__codelineno-13-53" name = "__codelineno-13-53" href = "#__codelineno-13-53" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "kc" > False< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-54" name = "__codelineno-13-54" href = "#__codelineno-13-54" > < / a >
< a id = "__codelineno-13-55" name = "__codelineno-13-55" href = "#__codelineno-13-55" > < / a > < span class = "k" > def< / span > < span class = "nf" > pop< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > is_front< / span > < span class = "p" > :< / span > < span class = "nb" > bool< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-56" name = "__codelineno-13-56" href = "#__codelineno-13-56" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 出队操作" " " < / span >
< a id = "__codelineno-13-57" name = "__codelineno-13-57" href = "#__codelineno-13-57" > < / a > < span class = "c1" > # 若队列为空，直接返回 None< / span >
< a id = "__codelineno-13-58" name = "__codelineno-13-58" href = "#__codelineno-13-58" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > is_empty< / span > < span class = "p" > ():< / span >
< a id = "__codelineno-13-59" name = "__codelineno-13-59" href = "#__codelineno-13-59" > < / a > < span class = "k" > return< / span > < span class = "kc" > None< / span >
< a id = "__codelineno-13-60" name = "__codelineno-13-60" href = "#__codelineno-13-60" > < / a > < span class = "c1" > # 队首出队操作< / span >
< a id = "__codelineno-13-61" name = "__codelineno-13-61" href = "#__codelineno-13-61" > < / a > < span class = "k" > if< / span > < span class = "n" > is_front< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-62" name = "__codelineno-13-62" href = "#__codelineno-13-62" > < / a > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "c1" > # 暂存头节点值< / span >
< a id = "__codelineno-13-63" name = "__codelineno-13-63" href = "#__codelineno-13-63" > < / a > < span class = "c1" > # 删除头节点< / span >
< a id = "__codelineno-13-64" name = "__codelineno-13-64" href = "#__codelineno-13-64" > < / a > < span class = "n" > fnext< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "o" > |< / span > < span class = "kc" > None< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > .< / span > < span class = "n" > next< / span >
< a id = "__codelineno-13-65" name = "__codelineno-13-65" href = "#__codelineno-13-65" > < / a > < span class = "k" > if< / span > < span class = "n" > fnext< / span > < span class = "o" > !=< / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-66" name = "__codelineno-13-66" href = "#__codelineno-13-66" > < / a > < span class = "n" > fnext< / span > < span class = "o" > .< / span > < span class = "n" > prev< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span >
< a id = "__codelineno-13-67" name = "__codelineno-13-67" href = "#__codelineno-13-67" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > .< / span > < span class = "n" > next< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span >
< a id = "__codelineno-13-68" name = "__codelineno-13-68" href = "#__codelineno-13-68" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > =< / span > < span class = "n" > fnext< / span > < span class = "c1" > # 更新头节点< / span >
< a id = "__codelineno-13-69" name = "__codelineno-13-69" href = "#__codelineno-13-69" > < / a > < span class = "c1" > # 队尾出队操作< / span >
< a id = "__codelineno-13-70" name = "__codelineno-13-70" href = "#__codelineno-13-70" > < / a > < span class = "k" > else< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-71" name = "__codelineno-13-71" href = "#__codelineno-13-71" > < / a > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "c1" > # 暂存尾节点值< / span >
< a id = "__codelineno-13-72" name = "__codelineno-13-72" href = "#__codelineno-13-72" > < / a > < span class = "c1" > # 删除尾节点< / span >
< a id = "__codelineno-13-73" name = "__codelineno-13-73" href = "#__codelineno-13-73" > < / a > < span class = "n" > rprev< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "o" > |< / span > < span class = "kc" > None< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > .< / span > < span class = "n" > prev< / span >
< a id = "__codelineno-13-74" name = "__codelineno-13-74" href = "#__codelineno-13-74" > < / a > < span class = "k" > if< / span > < span class = "n" > rprev< / span > < span class = "o" > !=< / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-75" name = "__codelineno-13-75" href = "#__codelineno-13-75" > < / a > < span class = "n" > rprev< / span > < span class = "o" > .< / span > < span class = "n" > next< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span >
< a id = "__codelineno-13-76" name = "__codelineno-13-76" href = "#__codelineno-13-76" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > .< / span > < span class = "n" > prev< / span > < span class = "o" > =< / span > < span class = "kc" > None< / span >
< a id = "__codelineno-13-77" name = "__codelineno-13-77" href = "#__codelineno-13-77" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > =< / span > < span class = "n" > rprev< / span > < span class = "c1" > # 更新尾节点< / span >
< a id = "__codelineno-13-78" name = "__codelineno-13-78" href = "#__codelineno-13-78" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span > < span class = "c1" > # 更新队列长度< / span >
< a id = "__codelineno-13-79" name = "__codelineno-13-79" href = "#__codelineno-13-79" > < / a > < span class = "k" > return< / span > < span class = "n" > val< / span >
< a id = "__codelineno-13-80" name = "__codelineno-13-80" href = "#__codelineno-13-80" > < / a >
< a id = "__codelineno-13-81" name = "__codelineno-13-81" href = "#__codelineno-13-81" > < / a > < span class = "k" > def< / span > < span class = "nf" > pop_first< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-82" name = "__codelineno-13-82" href = "#__codelineno-13-82" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队首出队" " " < / span >
< a id = "__codelineno-13-83" name = "__codelineno-13-83" href = "#__codelineno-13-83" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > True< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-84" name = "__codelineno-13-84" href = "#__codelineno-13-84" > < / a >
< a id = "__codelineno-13-85" name = "__codelineno-13-85" href = "#__codelineno-13-85" > < / a > < span class = "k" > def< / span > < span class = "nf" > pop_last< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-86" name = "__codelineno-13-86" href = "#__codelineno-13-86" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队尾出队" " " < / span >
< a id = "__codelineno-13-87" name = "__codelineno-13-87" href = "#__codelineno-13-87" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > False< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-88" name = "__codelineno-13-88" href = "#__codelineno-13-88" > < / a >
< a id = "__codelineno-13-89" name = "__codelineno-13-89" href = "#__codelineno-13-89" > < / a > < span class = "k" > def< / span > < span class = "nf" > peek_first< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-90" name = "__codelineno-13-90" href = "#__codelineno-13-90" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 访问队首元素" " " < / span >
< a id = "__codelineno-13-91" name = "__codelineno-13-91" href = "#__codelineno-13-91" > < / a > < span class = "k" > return< / span > < span class = "kc" > None< / span > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > is_empty< / span > < span class = "p" > ()< / span > < span class = "k" > else< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span > < span class = "o" > .< / span > < span class = "n" > val< / span >
< a id = "__codelineno-13-92" name = "__codelineno-13-92" href = "#__codelineno-13-92" > < / a >
< a id = "__codelineno-13-93" name = "__codelineno-13-93" href = "#__codelineno-13-93" > < / a > < span class = "k" > def< / span > < span class = "nf" > peek_last< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-94" name = "__codelineno-13-94" href = "#__codelineno-13-94" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 访问队尾元素" " " < / span >
< a id = "__codelineno-13-95" name = "__codelineno-13-95" href = "#__codelineno-13-95" > < / a > < span class = "k" > return< / span > < span class = "kc" > None< / span > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > is_empty< / span > < span class = "p" > ()< / span > < span class = "k" > else< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > rear< / span > < span class = "o" > .< / span > < span class = "n" > val< / span >
< a id = "__codelineno-13-96" name = "__codelineno-13-96" href = "#__codelineno-13-96" > < / a >
< a id = "__codelineno-13-97" name = "__codelineno-13-97" href = "#__codelineno-13-97" > < / a > < span class = "k" > def< / span > < span class = "nf" > to_array< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > list< / span > < span class = "p" > [< / span > < span class = "nb" > int< / span > < span class = "p" > ]:< / span >
< a id = "__codelineno-13-98" name = "__codelineno-13-98" href = "#__codelineno-13-98" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 返回数组用于打印" " " < / span >
< a id = "__codelineno-13-99" name = "__codelineno-13-99" href = "#__codelineno-13-99" > < / a > < span class = "n" > node< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > front< / span >
< a id = "__codelineno-13-100" name = "__codelineno-13-100" href = "#__codelineno-13-100" > < / a > < span class = "n" > res< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ]< / span > < span class = "o" > *< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-13-101" name = "__codelineno-13-101" href = "#__codelineno-13-101" > < / a > < span class = "k" > for< / span > < span class = "n" > i< / span > < span class = "ow" > in< / span > < span class = "nb" > range< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "p" > ()):< / span >
< a id = "__codelineno-13-102" name = "__codelineno-13-102" href = "#__codelineno-13-102" > < / a > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "n" > node< / span > < span class = "o" > .< / span > < span class = "n" > val< / span >
< a id = "__codelineno-13-103" name = "__codelineno-13-103" href = "#__codelineno-13-103" > < / a > < span class = "n" > node< / span > < span class = "o" > =< / span > < span class = "n" > node< / span > < span class = "o" > .< / span > < span class = "n" > next< / span >
< a id = "__codelineno-13-104" name = "__codelineno-13-104" href = "#__codelineno-13-104" > < / a > < span class = "k" > return< / span > < span class = "n" > res< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > linkedlist_deque.go< / span > < pre > < span > < / span > < code > < a id = "__codelineno-14-1" name = "__codelineno-14-1" href = "#__codelineno-14-1" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-14-2" name = "__codelineno-14-2" href = "#__codelineno-14-2" > < / a > < span class = "kd" > type< / span > < span class = "w" > < / span > < span class = "nx" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "kd" > struct< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-3" name = "__codelineno-14-3" href = "#__codelineno-14-3" > < / a > < span class = "w" > < / span > < span class = "c1" > // 使用内置包 list< / span >
< a id = "__codelineno-14-4" name = "__codelineno-14-4" href = "#__codelineno-14-4" > < / a > < span class = "w" > < / span > < span class = "nx" > data< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > list< / span > < span class = "p" > .< / span > < span class = "nx" > List< / span >
< a id = "__codelineno-14-5" name = "__codelineno-14-5" href = "#__codelineno-14-5" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-14-6" name = "__codelineno-14-6" href = "#__codelineno-14-6" > < / a >
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< a id = "__codelineno-14-7" name = "__codelineno-14-7" href = "#__codelineno-14-7" > < / a > < span class = "cm" > /* 初始化双端队列 */< / span >
< a id = "__codelineno-14-8" name = "__codelineno-14-8" href = "#__codelineno-14-8" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "nx" > newLinkedListDeque< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-9" name = "__codelineno-14-9" href = "#__codelineno-14-9" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-10" name = "__codelineno-14-10" href = "#__codelineno-14-10" > < / a > < span class = "w" > < / span > < span class = "nx" > data< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > list< / span > < span class = "p" > .< / span > < span class = "nx" > New< / span > < span class = "p" > (),< / span >
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< a id = "__codelineno-14-11" name = "__codelineno-14-11" href = "#__codelineno-14-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-12" name = "__codelineno-14-12" href = "#__codelineno-14-12" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-13" name = "__codelineno-14-13" href = "#__codelineno-14-13" > < / a >
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< a id = "__codelineno-14-14" name = "__codelineno-14-14" href = "#__codelineno-14-14" > < / a > < span class = "cm" > /* 队首元素入队 */< / span >
< a id = "__codelineno-14-15" name = "__codelineno-14-15" href = "#__codelineno-14-15" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > pushFirst< / span > < span class = "p" > (< / span > < span class = "nx" > value< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-16" name = "__codelineno-14-16" href = "#__codelineno-14-16" > < / a > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > PushFront< / span > < span class = "p" > (< / span > < span class = "nx" > value< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-17" name = "__codelineno-14-17" href = "#__codelineno-14-17" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-18" name = "__codelineno-14-18" href = "#__codelineno-14-18" > < / a >
< a id = "__codelineno-14-19" name = "__codelineno-14-19" href = "#__codelineno-14-19" > < / a > < span class = "cm" > /* 队尾元素入队 */< / span >
< a id = "__codelineno-14-20" name = "__codelineno-14-20" href = "#__codelineno-14-20" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > pushLast< / span > < span class = "p" > (< / span > < span class = "nx" > value< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-21" name = "__codelineno-14-21" href = "#__codelineno-14-21" > < / a > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > PushBack< / span > < span class = "p" > (< / span > < span class = "nx" > value< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-22" name = "__codelineno-14-22" href = "#__codelineno-14-22" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-23" name = "__codelineno-14-23" href = "#__codelineno-14-23" > < / a >
< a id = "__codelineno-14-24" name = "__codelineno-14-24" href = "#__codelineno-14-24" > < / a > < span class = "cm" > /* 队首元素出队 */< / span >
< a id = "__codelineno-14-25" name = "__codelineno-14-25" href = "#__codelineno-14-25" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-26" name = "__codelineno-14-26" href = "#__codelineno-14-26" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-27" name = "__codelineno-14-27" href = "#__codelineno-14-27" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-14-28" name = "__codelineno-14-28" href = "#__codelineno-14-28" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-29" name = "__codelineno-14-29" href = "#__codelineno-14-29" > < / a > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Front< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-14-30" name = "__codelineno-14-30" href = "#__codelineno-14-30" > < / a > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Remove< / span > < span class = "p" > (< / span > < span class = "nx" > e< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-31" name = "__codelineno-14-31" href = "#__codelineno-14-31" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "p" > .< / span > < span class = "nx" > Value< / span >
< a id = "__codelineno-14-32" name = "__codelineno-14-32" href = "#__codelineno-14-32" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-33" name = "__codelineno-14-33" href = "#__codelineno-14-33" > < / a >
< a id = "__codelineno-14-34" name = "__codelineno-14-34" href = "#__codelineno-14-34" > < / a > < span class = "cm" > /* 队尾元素出队 */< / span >
< a id = "__codelineno-14-35" name = "__codelineno-14-35" href = "#__codelineno-14-35" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-36" name = "__codelineno-14-36" href = "#__codelineno-14-36" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-37" name = "__codelineno-14-37" href = "#__codelineno-14-37" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-14-38" name = "__codelineno-14-38" href = "#__codelineno-14-38" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-39" name = "__codelineno-14-39" href = "#__codelineno-14-39" > < / a > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Back< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-14-40" name = "__codelineno-14-40" href = "#__codelineno-14-40" > < / a > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Remove< / span > < span class = "p" > (< / span > < span class = "nx" > e< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-41" name = "__codelineno-14-41" href = "#__codelineno-14-41" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "p" > .< / span > < span class = "nx" > Value< / span >
< a id = "__codelineno-14-42" name = "__codelineno-14-42" href = "#__codelineno-14-42" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-43" name = "__codelineno-14-43" href = "#__codelineno-14-43" > < / a >
< a id = "__codelineno-14-44" name = "__codelineno-14-44" href = "#__codelineno-14-44" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-14-45" name = "__codelineno-14-45" href = "#__codelineno-14-45" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-46" name = "__codelineno-14-46" href = "#__codelineno-14-46" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-47" name = "__codelineno-14-47" href = "#__codelineno-14-47" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-14-48" name = "__codelineno-14-48" href = "#__codelineno-14-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-49" name = "__codelineno-14-49" href = "#__codelineno-14-49" > < / a > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Front< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-14-50" name = "__codelineno-14-50" href = "#__codelineno-14-50" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "p" > .< / span > < span class = "nx" > Value< / span >
< a id = "__codelineno-14-51" name = "__codelineno-14-51" href = "#__codelineno-14-51" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-52" name = "__codelineno-14-52" href = "#__codelineno-14-52" > < / a >
< a id = "__codelineno-14-53" name = "__codelineno-14-53" href = "#__codelineno-14-53" > < / a > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-14-54" name = "__codelineno-14-54" href = "#__codelineno-14-54" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-55" name = "__codelineno-14-55" href = "#__codelineno-14-55" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-56" name = "__codelineno-14-56" href = "#__codelineno-14-56" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-14-57" name = "__codelineno-14-57" href = "#__codelineno-14-57" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-58" name = "__codelineno-14-58" href = "#__codelineno-14-58" > < / a > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Back< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-14-59" name = "__codelineno-14-59" href = "#__codelineno-14-59" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > e< / span > < span class = "p" > .< / span > < span class = "nx" > Value< / span >
< a id = "__codelineno-14-60" name = "__codelineno-14-60" href = "#__codelineno-14-60" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-61" name = "__codelineno-14-61" href = "#__codelineno-14-61" > < / a >
< a id = "__codelineno-14-62" name = "__codelineno-14-62" href = "#__codelineno-14-62" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-14-63" name = "__codelineno-14-63" href = "#__codelineno-14-63" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-64" name = "__codelineno-14-64" href = "#__codelineno-14-64" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Len< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-14-65" name = "__codelineno-14-65" href = "#__codelineno-14-65" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-66" name = "__codelineno-14-66" href = "#__codelineno-14-66" > < / a >
< a id = "__codelineno-14-67" name = "__codelineno-14-67" href = "#__codelineno-14-67" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-14-68" name = "__codelineno-14-68" href = "#__codelineno-14-68" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-69" name = "__codelineno-14-69" href = "#__codelineno-14-69" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span > < span class = "p" > .< / span > < span class = "nx" > Len< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-14-70" name = "__codelineno-14-70" href = "#__codelineno-14-70" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-71" name = "__codelineno-14-71" href = "#__codelineno-14-71" > < / a >
< a id = "__codelineno-14-72" name = "__codelineno-14-72" href = "#__codelineno-14-72" > < / a > < span class = "cm" > /* 获取 List 用于打印 */< / span >
< a id = "__codelineno-14-73" name = "__codelineno-14-73" href = "#__codelineno-14-73" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > s< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > toList< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > list< / span > < span class = "p" > .< / span > < span class = "nx" > List< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-74" name = "__codelineno-14-74" href = "#__codelineno-14-74" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > s< / span > < span class = "p" > .< / span > < span class = "nx" > data< / span >
< a id = "__codelineno-14-75" name = "__codelineno-14-75" href = "#__codelineno-14-75" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > linkedlist_deque.js< / span > < pre > < span > < / span > < code > < a id = "__codelineno-15-1" name = "__codelineno-15-1" href = "#__codelineno-15-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
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< a id = "__codelineno-15-2" name = "__codelineno-15-2" href = "#__codelineno-15-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > ListNode< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
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< a id = "__codelineno-15-3" name = "__codelineno-15-3" href = "#__codelineno-15-3" > < / a > < span class = "w" > < / span > < span class = "nx" > prev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点引用 (指针)< / span >
< a id = "__codelineno-15-4" name = "__codelineno-15-4" href = "#__codelineno-15-4" > < / a > < span class = "w" > < / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点引用 (指针)< / span >
< a id = "__codelineno-15-5" name = "__codelineno-15-5" href = "#__codelineno-15-5" > < / a > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
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< a id = "__codelineno-15-6" name = "__codelineno-15-6" href = "#__codelineno-15-6" > < / a >
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< a id = "__codelineno-15-7" name = "__codelineno-15-7" href = "#__codelineno-15-7" > < / a > < span class = "w" > < / span > < span class = "kr" > constructor< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
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< a id = "__codelineno-15-8" name = "__codelineno-15-8" href = "#__codelineno-15-8" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-9" name = "__codelineno-15-9" href = "#__codelineno-15-9" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-10" name = "__codelineno-15-10" href = "#__codelineno-15-10" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-11" name = "__codelineno-15-11" href = "#__codelineno-15-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-12" name = "__codelineno-15-12" href = "#__codelineno-15-12" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-15-13" name = "__codelineno-15-13" href = "#__codelineno-15-13" > < / a >
< a id = "__codelineno-15-14" name = "__codelineno-15-14" href = "#__codelineno-15-14" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-15-15" name = "__codelineno-15-15" href = "#__codelineno-15-15" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > LinkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
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< a id = "__codelineno-15-16" name = "__codelineno-15-16" href = "#__codelineno-15-16" > < / a > < span class = "w" > < / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 front< / span >
< a id = "__codelineno-15-17" name = "__codelineno-15-17" href = "#__codelineno-15-17" > < / a > < span class = "w" > < / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 尾节点 rear< / span >
< a id = "__codelineno-15-18" name = "__codelineno-15-18" href = "#__codelineno-15-18" > < / a > < span class = "w" > < / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
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< a id = "__codelineno-15-19" name = "__codelineno-15-19" href = "#__codelineno-15-19" > < / a >
< a id = "__codelineno-15-20" name = "__codelineno-15-20" href = "#__codelineno-15-20" > < / a > < span class = "w" > < / span > < span class = "kr" > constructor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
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< a id = "__codelineno-15-21" name = "__codelineno-15-21" href = "#__codelineno-15-21" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-22" name = "__codelineno-15-22" href = "#__codelineno-15-22" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-23" name = "__codelineno-15-23" href = "#__codelineno-15-23" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-15-24" name = "__codelineno-15-24" href = "#__codelineno-15-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-25" name = "__codelineno-15-25" href = "#__codelineno-15-25" > < / a >
< a id = "__codelineno-15-26" name = "__codelineno-15-26" href = "#__codelineno-15-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队操作 */< / span >
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< a id = "__codelineno-15-27" name = "__codelineno-15-27" href = "#__codelineno-15-27" > < / a > < span class = "w" > < / span > < span class = "nx" > pushLast< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-28" name = "__codelineno-15-28" href = "#__codelineno-15-28" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "nx" > ListNode< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "p" > );< / span >
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< a id = "__codelineno-15-29" name = "__codelineno-15-29" href = "#__codelineno-15-29" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
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< a id = "__codelineno-15-30" name = "__codelineno-15-30" href = "#__codelineno-15-30" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-31" name = "__codelineno-15-31" href = "#__codelineno-15-31" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-32" name = "__codelineno-15-32" href = "#__codelineno-15-32" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-15-33" name = "__codelineno-15-33" href = "#__codelineno-15-33" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-34" name = "__codelineno-15-34" href = "#__codelineno-15-34" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
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< a id = "__codelineno-15-35" name = "__codelineno-15-35" href = "#__codelineno-15-35" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-36" name = "__codelineno-15-36" href = "#__codelineno-15-36" > < / a > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-37" name = "__codelineno-15-37" href = "#__codelineno-15-37" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
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< a id = "__codelineno-15-38" name = "__codelineno-15-38" href = "#__codelineno-15-38" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-15-39" name = "__codelineno-15-39" href = "#__codelineno-15-39" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-15-40" name = "__codelineno-15-40" href = "#__codelineno-15-40" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-41" name = "__codelineno-15-41" href = "#__codelineno-15-41" > < / a >
< a id = "__codelineno-15-42" name = "__codelineno-15-42" href = "#__codelineno-15-42" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队操作 */< / span >
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< a id = "__codelineno-15-43" name = "__codelineno-15-43" href = "#__codelineno-15-43" > < / a > < span class = "w" > < / span > < span class = "nx" > pushFirst< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-44" name = "__codelineno-15-44" href = "#__codelineno-15-44" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "nx" > ListNode< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "p" > );< / span >
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< a id = "__codelineno-15-45" name = "__codelineno-15-45" href = "#__codelineno-15-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
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< a id = "__codelineno-15-46" name = "__codelineno-15-46" href = "#__codelineno-15-46" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-47" name = "__codelineno-15-47" href = "#__codelineno-15-47" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-48" name = "__codelineno-15-48" href = "#__codelineno-15-48" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-15-49" name = "__codelineno-15-49" href = "#__codelineno-15-49" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-50" name = "__codelineno-15-50" href = "#__codelineno-15-50" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
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< a id = "__codelineno-15-51" name = "__codelineno-15-51" href = "#__codelineno-15-51" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-52" name = "__codelineno-15-52" href = "#__codelineno-15-52" > < / a > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-53" name = "__codelineno-15-53" href = "#__codelineno-15-53" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
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< a id = "__codelineno-15-54" name = "__codelineno-15-54" href = "#__codelineno-15-54" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-15-55" name = "__codelineno-15-55" href = "#__codelineno-15-55" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-15-56" name = "__codelineno-15-56" href = "#__codelineno-15-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-57" name = "__codelineno-15-57" href = "#__codelineno-15-57" > < / a >
< a id = "__codelineno-15-58" name = "__codelineno-15-58" href = "#__codelineno-15-58" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队操作 */< / span >
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< a id = "__codelineno-15-59" name = "__codelineno-15-59" href = "#__codelineno-15-59" > < / a > < span class = "w" > < / span > < span class = "nx" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-60" name = "__codelineno-15-60" href = "#__codelineno-15-60" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
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< a id = "__codelineno-15-61" name = "__codelineno-15-61" href = "#__codelineno-15-61" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-62" name = "__codelineno-15-62" href = "#__codelineno-15-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-15-63" name = "__codelineno-15-63" href = "#__codelineno-15-63" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 存储尾节点值< / span >
2023-04-09 04:35:05 +08:00
< a id = "__codelineno-15-64" name = "__codelineno-15-64" href = "#__codelineno-15-64" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除尾节点< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-65" name = "__codelineno-15-65" href = "#__codelineno-15-65" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-66" name = "__codelineno-15-66" href = "#__codelineno-15-66" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > !==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-67" name = "__codelineno-15-67" href = "#__codelineno-15-67" > < / a > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-68" name = "__codelineno-15-68" href = "#__codelineno-15-68" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-69" name = "__codelineno-15-69" href = "#__codelineno-15-69" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-70" name = "__codelineno-15-70" href = "#__codelineno-15-70" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-15-71" name = "__codelineno-15-71" href = "#__codelineno-15-71" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-72" name = "__codelineno-15-72" href = "#__codelineno-15-72" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-73" name = "__codelineno-15-73" href = "#__codelineno-15-73" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-74" name = "__codelineno-15-74" href = "#__codelineno-15-74" > < / a >
< a id = "__codelineno-15-75" name = "__codelineno-15-75" href = "#__codelineno-15-75" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队操作 */< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-76" name = "__codelineno-15-76" href = "#__codelineno-15-76" > < / a > < span class = "w" > < / span > < span class = "nx" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-77" name = "__codelineno-15-77" href = "#__codelineno-15-77" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-78" name = "__codelineno-15-78" href = "#__codelineno-15-78" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-79" name = "__codelineno-15-79" href = "#__codelineno-15-79" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-80" name = "__codelineno-15-80" href = "#__codelineno-15-80" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 存储尾节点值< / span >
2023-04-09 04:35:05 +08:00
< a id = "__codelineno-15-81" name = "__codelineno-15-81" href = "#__codelineno-15-81" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头节点< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-82" name = "__codelineno-15-82" href = "#__codelineno-15-82" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-83" name = "__codelineno-15-83" href = "#__codelineno-15-83" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > !==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-84" name = "__codelineno-15-84" href = "#__codelineno-15-84" > < / a > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-85" name = "__codelineno-15-85" href = "#__codelineno-15-85" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-86" name = "__codelineno-15-86" href = "#__codelineno-15-86" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-87" name = "__codelineno-15-87" href = "#__codelineno-15-87" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-15-88" name = "__codelineno-15-88" href = "#__codelineno-15-88" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-89" name = "__codelineno-15-89" href = "#__codelineno-15-89" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-90" name = "__codelineno-15-90" href = "#__codelineno-15-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-91" name = "__codelineno-15-91" href = "#__codelineno-15-91" > < / a >
< a id = "__codelineno-15-92" name = "__codelineno-15-92" href = "#__codelineno-15-92" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-93" name = "__codelineno-15-93" href = "#__codelineno-15-93" > < / a > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-94" name = "__codelineno-15-94" href = "#__codelineno-15-94" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-95" name = "__codelineno-15-95" href = "#__codelineno-15-95" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-96" name = "__codelineno-15-96" href = "#__codelineno-15-96" > < / a >
< a id = "__codelineno-15-97" name = "__codelineno-15-97" href = "#__codelineno-15-97" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-98" name = "__codelineno-15-98" href = "#__codelineno-15-98" > < / a > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-99" name = "__codelineno-15-99" href = "#__codelineno-15-99" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-100" name = "__codelineno-15-100" href = "#__codelineno-15-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-101" name = "__codelineno-15-101" href = "#__codelineno-15-101" > < / a >
< a id = "__codelineno-15-102" name = "__codelineno-15-102" href = "#__codelineno-15-102" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-103" name = "__codelineno-15-103" href = "#__codelineno-15-103" > < / a > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-104" name = "__codelineno-15-104" href = "#__codelineno-15-104" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-105" name = "__codelineno-15-105" href = "#__codelineno-15-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-106" name = "__codelineno-15-106" href = "#__codelineno-15-106" > < / a >
< a id = "__codelineno-15-107" name = "__codelineno-15-107" href = "#__codelineno-15-107" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-108" name = "__codelineno-15-108" href = "#__codelineno-15-108" > < / a > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-109" name = "__codelineno-15-109" href = "#__codelineno-15-109" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-110" name = "__codelineno-15-110" href = "#__codelineno-15-110" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-111" name = "__codelineno-15-111" href = "#__codelineno-15-111" > < / a >
< a id = "__codelineno-15-112" name = "__codelineno-15-112" href = "#__codelineno-15-112" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印双向队列 */< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-15-113" name = "__codelineno-15-113" href = "#__codelineno-15-113" > < / a > < span class = "w" > < / span > < span class = "nx" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-114" name = "__codelineno-15-114" href = "#__codelineno-15-114" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-15-115" name = "__codelineno-15-115" href = "#__codelineno-15-115" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-116" name = "__codelineno-15-116" href = "#__codelineno-15-116" > < / a > < span class = "w" > < / span > < span class = "k" > while< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > !==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-117" name = "__codelineno-15-117" href = "#__codelineno-15-117" > < / a > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-15-118" name = "__codelineno-15-118" href = "#__codelineno-15-118" > < / a > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-119" name = "__codelineno-15-119" href = "#__codelineno-15-119" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-04-17 21:57:50 +08:00
< a id = "__codelineno-15-120" name = "__codelineno-15-120" href = "#__codelineno-15-120" > < / a > < span class = "w" > < / span > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s1" > ' [' < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "p" > .< / span > < span class = "nx" > join< / span > < span class = "p" > (< / span > < span class = "s1" > ' , ' < / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s1" > ' ]' < / span > < span class = "p" > );< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-121" name = "__codelineno-15-121" href = "#__codelineno-15-121" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-122" name = "__codelineno-15-122" href = "#__codelineno-15-122" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > linkedlist_deque.ts< / span > < pre > < span > < / span > < code > < a id = "__codelineno-16-1" name = "__codelineno-16-1" href = "#__codelineno-16-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
< a id = "__codelineno-16-2" name = "__codelineno-16-2" href = "#__codelineno-16-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > ListNode< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-3" name = "__codelineno-16-3" href = "#__codelineno-16-3" > < / a > < span class = "w" > < / span > < span class = "nx" > prev< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点引用 (指针)< / span >
< a id = "__codelineno-16-4" name = "__codelineno-16-4" href = "#__codelineno-16-4" > < / a > < span class = "w" > < / span > < span class = "nx" > next< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点引用 (指针)< / span >
< a id = "__codelineno-16-5" name = "__codelineno-16-5" href = "#__codelineno-16-5" > < / a > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-16-6" name = "__codelineno-16-6" href = "#__codelineno-16-6" > < / a >
< a id = "__codelineno-16-7" name = "__codelineno-16-7" href = "#__codelineno-16-7" > < / a > < span class = "w" > < / span > < span class = "kr" > constructor< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-8" name = "__codelineno-16-8" href = "#__codelineno-16-8" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-9" name = "__codelineno-16-9" href = "#__codelineno-16-9" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-10" name = "__codelineno-16-10" href = "#__codelineno-16-10" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-11" name = "__codelineno-16-11" href = "#__codelineno-16-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-12" name = "__codelineno-16-12" href = "#__codelineno-16-12" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-16-13" name = "__codelineno-16-13" href = "#__codelineno-16-13" > < / a >
< a id = "__codelineno-16-14" name = "__codelineno-16-14" href = "#__codelineno-16-14" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-16-15" name = "__codelineno-16-15" href = "#__codelineno-16-15" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > LinkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-16" name = "__codelineno-16-16" href = "#__codelineno-16-16" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "nx" > front< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 front< / span >
< a id = "__codelineno-16-17" name = "__codelineno-16-17" href = "#__codelineno-16-17" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "nx" > rear< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 尾节点 rear< / span >
< a id = "__codelineno-16-18" name = "__codelineno-16-18" href = "#__codelineno-16-18" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "nx" > queSize< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-16-19" name = "__codelineno-16-19" href = "#__codelineno-16-19" > < / a >
< a id = "__codelineno-16-20" name = "__codelineno-16-20" href = "#__codelineno-16-20" > < / a > < span class = "w" > < / span > < span class = "kr" > constructor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-21" name = "__codelineno-16-21" href = "#__codelineno-16-21" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-22" name = "__codelineno-16-22" href = "#__codelineno-16-22" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-23" name = "__codelineno-16-23" href = "#__codelineno-16-23" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-24" name = "__codelineno-16-24" href = "#__codelineno-16-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-25" name = "__codelineno-16-25" href = "#__codelineno-16-25" > < / a >
< a id = "__codelineno-16-26" name = "__codelineno-16-26" href = "#__codelineno-16-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队操作 */< / span >
< a id = "__codelineno-16-27" name = "__codelineno-16-27" href = "#__codelineno-16-27" > < / a > < span class = "w" > < / span > < span class = "nx" > pushLast< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > )< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "ow" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-28" name = "__codelineno-16-28" href = "#__codelineno-16-28" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "nx" > ListNode< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-16-29" name = "__codelineno-16-29" href = "#__codelineno-16-29" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-16-30" name = "__codelineno-16-30" href = "#__codelineno-16-30" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-31" name = "__codelineno-16-31" href = "#__codelineno-16-31" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-32" name = "__codelineno-16-32" href = "#__codelineno-16-32" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-33" name = "__codelineno-16-33" href = "#__codelineno-16-33" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-34" name = "__codelineno-16-34" href = "#__codelineno-16-34" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-16-35" name = "__codelineno-16-35" href = "#__codelineno-16-35" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-36" name = "__codelineno-16-36" href = "#__codelineno-16-36" > < / a > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-37" name = "__codelineno-16-37" href = "#__codelineno-16-37" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-16-38" name = "__codelineno-16-38" href = "#__codelineno-16-38" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-39" name = "__codelineno-16-39" href = "#__codelineno-16-39" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-40" name = "__codelineno-16-40" href = "#__codelineno-16-40" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-41" name = "__codelineno-16-41" href = "#__codelineno-16-41" > < / a >
< a id = "__codelineno-16-42" name = "__codelineno-16-42" href = "#__codelineno-16-42" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队操作 */< / span >
< a id = "__codelineno-16-43" name = "__codelineno-16-43" href = "#__codelineno-16-43" > < / a > < span class = "w" > < / span > < span class = "nx" > pushFirst< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > )< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "ow" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-44" name = "__codelineno-16-44" href = "#__codelineno-16-44" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "nx" > ListNode< / span > < span class = "p" > (< / span > < span class = "nx" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-16-45" name = "__codelineno-16-45" href = "#__codelineno-16-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-16-46" name = "__codelineno-16-46" href = "#__codelineno-16-46" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-47" name = "__codelineno-16-47" href = "#__codelineno-16-47" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-48" name = "__codelineno-16-48" href = "#__codelineno-16-48" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-49" name = "__codelineno-16-49" href = "#__codelineno-16-49" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-50" name = "__codelineno-16-50" href = "#__codelineno-16-50" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-16-51" name = "__codelineno-16-51" href = "#__codelineno-16-51" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-52" name = "__codelineno-16-52" href = "#__codelineno-16-52" > < / a > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-53" name = "__codelineno-16-53" href = "#__codelineno-16-53" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-16-54" name = "__codelineno-16-54" href = "#__codelineno-16-54" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-55" name = "__codelineno-16-55" href = "#__codelineno-16-55" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-56" name = "__codelineno-16-56" href = "#__codelineno-16-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-04-22 01:35:59 +08:00
< a id = "__codelineno-16-57" name = "__codelineno-16-57" href = "#__codelineno-16-57" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-16-58" name = "__codelineno-16-58" href = "#__codelineno-16-58" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队操作 */< / span >
< a id = "__codelineno-16-59" name = "__codelineno-16-59" href = "#__codelineno-16-59" > < / a > < span class = "w" > < / span > < span class = "nx" > popLast< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-60" name = "__codelineno-16-60" href = "#__codelineno-16-60" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-61" name = "__codelineno-16-61" href = "#__codelineno-16-61" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-62" name = "__codelineno-16-62" href = "#__codelineno-16-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-63" name = "__codelineno-16-63" href = "#__codelineno-16-63" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 存储尾节点值< / span >
< a id = "__codelineno-16-64" name = "__codelineno-16-64" href = "#__codelineno-16-64" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除尾节点< / span >
< a id = "__codelineno-16-65" name = "__codelineno-16-65" href = "#__codelineno-16-65" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-66" name = "__codelineno-16-66" href = "#__codelineno-16-66" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > !==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-67" name = "__codelineno-16-67" href = "#__codelineno-16-67" > < / a > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-68" name = "__codelineno-16-68" href = "#__codelineno-16-68" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-69" name = "__codelineno-16-69" href = "#__codelineno-16-69" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-70" name = "__codelineno-16-70" href = "#__codelineno-16-70" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-16-71" name = "__codelineno-16-71" href = "#__codelineno-16-71" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-72" name = "__codelineno-16-72" href = "#__codelineno-16-72" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-73" name = "__codelineno-16-73" href = "#__codelineno-16-73" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-74" name = "__codelineno-16-74" href = "#__codelineno-16-74" > < / a >
< a id = "__codelineno-16-75" name = "__codelineno-16-75" href = "#__codelineno-16-75" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队操作 */< / span >
< a id = "__codelineno-16-76" name = "__codelineno-16-76" href = "#__codelineno-16-76" > < / a > < span class = "w" > < / span > < span class = "nx" > popFirst< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-77" name = "__codelineno-16-77" href = "#__codelineno-16-77" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-78" name = "__codelineno-16-78" href = "#__codelineno-16-78" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-79" name = "__codelineno-16-79" href = "#__codelineno-16-79" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-80" name = "__codelineno-16-80" href = "#__codelineno-16-80" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 存储尾节点值< / span >
< a id = "__codelineno-16-81" name = "__codelineno-16-81" href = "#__codelineno-16-81" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头节点< / span >
< a id = "__codelineno-16-82" name = "__codelineno-16-82" href = "#__codelineno-16-82" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-83" name = "__codelineno-16-83" href = "#__codelineno-16-83" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > !==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-84" name = "__codelineno-16-84" href = "#__codelineno-16-84" > < / a > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-85" name = "__codelineno-16-85" href = "#__codelineno-16-85" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-86" name = "__codelineno-16-86" href = "#__codelineno-16-86" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-87" name = "__codelineno-16-87" href = "#__codelineno-16-87" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-16-88" name = "__codelineno-16-88" href = "#__codelineno-16-88" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-89" name = "__codelineno-16-89" href = "#__codelineno-16-89" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > value< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-90" name = "__codelineno-16-90" href = "#__codelineno-16-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-16-91" name = "__codelineno-16-91" href = "#__codelineno-16-91" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-16-92" name = "__codelineno-16-92" href = "#__codelineno-16-92" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-16-93" name = "__codelineno-16-93" href = "#__codelineno-16-93" > < / a > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-94" name = "__codelineno-16-94" href = "#__codelineno-16-94" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "nx" > null< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > this.rear.val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-95" name = "__codelineno-16-95" href = "#__codelineno-16-95" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-04-22 01:35:59 +08:00
< a id = "__codelineno-16-96" name = "__codelineno-16-96" href = "#__codelineno-16-96" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-16-97" name = "__codelineno-16-97" href = "#__codelineno-16-97" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-16-98" name = "__codelineno-16-98" href = "#__codelineno-16-98" > < / a > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-99" name = "__codelineno-16-99" href = "#__codelineno-16-99" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "nx" > null< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > this.front.val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-100" name = "__codelineno-16-100" href = "#__codelineno-16-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-101" name = "__codelineno-16-101" href = "#__codelineno-16-101" > < / a >
< a id = "__codelineno-16-102" name = "__codelineno-16-102" href = "#__codelineno-16-102" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-16-103" name = "__codelineno-16-103" href = "#__codelineno-16-103" > < / a > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-104" name = "__codelineno-16-104" href = "#__codelineno-16-104" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-105" name = "__codelineno-16-105" href = "#__codelineno-16-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-106" name = "__codelineno-16-106" href = "#__codelineno-16-106" > < / a >
< a id = "__codelineno-16-107" name = "__codelineno-16-107" href = "#__codelineno-16-107" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-16-108" name = "__codelineno-16-108" href = "#__codelineno-16-108" > < / a > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-109" name = "__codelineno-16-109" href = "#__codelineno-16-109" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-110" name = "__codelineno-16-110" href = "#__codelineno-16-110" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-111" name = "__codelineno-16-111" href = "#__codelineno-16-111" > < / a >
< a id = "__codelineno-16-112" name = "__codelineno-16-112" href = "#__codelineno-16-112" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印双向队列 */< / span >
< a id = "__codelineno-16-113" name = "__codelineno-16-113" href = "#__codelineno-16-113" > < / a > < span class = "w" > < / span > < span class = "nx" > print< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "ow" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-114" name = "__codelineno-16-114" href = "#__codelineno-16-114" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-16-115" name = "__codelineno-16-115" href = "#__codelineno-16-115" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > ListNode< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-116" name = "__codelineno-16-116" href = "#__codelineno-16-116" > < / a > < span class = "w" > < / span > < span class = "k" > while< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > !==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-16-117" name = "__codelineno-16-117" href = "#__codelineno-16-117" > < / a > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-16-118" name = "__codelineno-16-118" href = "#__codelineno-16-118" > < / a > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > temp< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-16-119" name = "__codelineno-16-119" href = "#__codelineno-16-119" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-120" name = "__codelineno-16-120" href = "#__codelineno-16-120" > < / a > < span class = "w" > < / span > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s1" > ' [' < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "p" > .< / span > < span class = "nx" > join< / span > < span class = "p" > (< / span > < span class = "s1" > ' , ' < / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s1" > ' ]' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-16-121" name = "__codelineno-16-121" href = "#__codelineno-16-121" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-16-122" name = "__codelineno-16-122" href = "#__codelineno-16-122" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > linkedlist_deque.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-17-1" name = "__codelineno-17-1" href = "#__codelineno-17-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
< a id = "__codelineno-17-2" name = "__codelineno-17-2" href = "#__codelineno-17-2" > < / a > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > doublyListNode< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-3" name = "__codelineno-17-3" href = "#__codelineno-17-3" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-17-4" name = "__codelineno-17-4" href = "#__codelineno-17-4" > < / a > < span class = "w" > < / span > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点< / span >
< a id = "__codelineno-17-5" name = "__codelineno-17-5" href = "#__codelineno-17-5" > < / a > < span class = "w" > < / span > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点< / span >
< a id = "__codelineno-17-6" name = "__codelineno-17-6" href = "#__codelineno-17-6" > < / a > < span class = "p" > };< / span >
< a id = "__codelineno-17-7" name = "__codelineno-17-7" href = "#__codelineno-17-7" > < / a >
< a id = "__codelineno-17-8" name = "__codelineno-17-8" href = "#__codelineno-17-8" > < / a > < span class = "k" > typedef< / span > < span class = "w" > < / span > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > doublyListNode< / span > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-9" name = "__codelineno-17-9" href = "#__codelineno-17-9" > < / a >
< a id = "__codelineno-17-10" name = "__codelineno-17-10" href = "#__codelineno-17-10" > < / a > < span class = "cm" > /* 构造函数 */< / span >
< a id = "__codelineno-17-11" name = "__codelineno-17-11" href = "#__codelineno-17-11" > < / a > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nf" > newDoublyListNode< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-12" name = "__codelineno-17-12" href = "#__codelineno-17-12" > < / a > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > new< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "p" > )< / span > < span class = "n" > malloc< / span > < span class = "p" > (< / span > < span class = "k" > sizeof< / span > < span class = "p" > (< / span > < span class = "n" > doublyListNode< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-17-13" name = "__codelineno-17-13" href = "#__codelineno-17-13" > < / a > < span class = "w" > < / span > < span class = "n" > new< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-14" name = "__codelineno-17-14" href = "#__codelineno-17-14" > < / a > < span class = "w" > < / span > < span class = "n" > new< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-15" name = "__codelineno-17-15" href = "#__codelineno-17-15" > < / a > < span class = "w" > < / span > < span class = "n" > new< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-16" name = "__codelineno-17-16" href = "#__codelineno-17-16" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > new< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-17" name = "__codelineno-17-17" href = "#__codelineno-17-17" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-17-18" name = "__codelineno-17-18" href = "#__codelineno-17-18" > < / a >
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< a id = "__codelineno-17-19" name = "__codelineno-17-19" href = "#__codelineno-17-19" > < / a > < span class = "cm" > /* 析构函数 */< / span >
< a id = "__codelineno-17-20" name = "__codelineno-17-20" href = "#__codelineno-17-20" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > delDoublyListNode< / span > < span class = "p" > (< / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > node< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-21" name = "__codelineno-17-21" href = "#__codelineno-17-21" > < / a > < span class = "w" > < / span > < span class = "n" > free< / span > < span class = "p" > (< / span > < span class = "n" > node< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-22" name = "__codelineno-17-22" href = "#__codelineno-17-22" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-17-23" name = "__codelineno-17-23" href = "#__codelineno-17-23" > < / a >
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< a id = "__codelineno-17-24" name = "__codelineno-17-24" href = "#__codelineno-17-24" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-17-25" name = "__codelineno-17-25" href = "#__codelineno-17-25" > < / a > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-26" name = "__codelineno-17-26" href = "#__codelineno-17-26" > < / a > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > front< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 front ，尾节点 rear< / span >
< a id = "__codelineno-17-27" name = "__codelineno-17-27" href = "#__codelineno-17-27" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-17-28" name = "__codelineno-17-28" href = "#__codelineno-17-28" > < / a > < span class = "p" > };< / span >
< a id = "__codelineno-17-29" name = "__codelineno-17-29" href = "#__codelineno-17-29" > < / a >
< a id = "__codelineno-17-30" name = "__codelineno-17-30" href = "#__codelineno-17-30" > < / a > < span class = "k" > typedef< / span > < span class = "w" > < / span > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "n" > linkedListDeque< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-31" name = "__codelineno-17-31" href = "#__codelineno-17-31" > < / a >
< a id = "__codelineno-17-32" name = "__codelineno-17-32" href = "#__codelineno-17-32" > < / a > < span class = "cm" > /* 构造函数 */< / span >
< a id = "__codelineno-17-33" name = "__codelineno-17-33" href = "#__codelineno-17-33" > < / a > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nf" > newLinkedListDeque< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-34" name = "__codelineno-17-34" href = "#__codelineno-17-34" > < / a > < span class = "w" > < / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "p" > )< / span > < span class = "n" > malloc< / span > < span class = "p" > (< / span > < span class = "k" > sizeof< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-17-35" name = "__codelineno-17-35" href = "#__codelineno-17-35" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-36" name = "__codelineno-17-36" href = "#__codelineno-17-36" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-37" name = "__codelineno-17-37" href = "#__codelineno-17-37" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-38" name = "__codelineno-17-38" href = "#__codelineno-17-38" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-39" name = "__codelineno-17-39" href = "#__codelineno-17-39" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-40" name = "__codelineno-17-40" href = "#__codelineno-17-40" > < / a >
< a id = "__codelineno-17-41" name = "__codelineno-17-41" href = "#__codelineno-17-41" > < / a > < span class = "cm" > /* 析构函数 */< / span >
< a id = "__codelineno-17-42" name = "__codelineno-17-42" href = "#__codelineno-17-42" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > delLinkedListdeque< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-43" name = "__codelineno-17-43" href = "#__codelineno-17-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 释放所有节点< / span >
< a id = "__codelineno-17-44" name = "__codelineno-17-44" href = "#__codelineno-17-44" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-45" name = "__codelineno-17-45" href = "#__codelineno-17-45" > < / a > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > tmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-46" name = "__codelineno-17-46" href = "#__codelineno-17-46" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-47" name = "__codelineno-17-47" href = "#__codelineno-17-47" > < / a > < span class = "w" > < / span > < span class = "n" > free< / span > < span class = "p" > (< / span > < span class = "n" > tmp< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-48" name = "__codelineno-17-48" href = "#__codelineno-17-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-49" name = "__codelineno-17-49" href = "#__codelineno-17-49" > < / a > < span class = "w" > < / span > < span class = "c1" > // 释放 deque 结构体< / span >
< a id = "__codelineno-17-50" name = "__codelineno-17-50" href = "#__codelineno-17-50" > < / a > < span class = "w" > < / span > < span class = "n" > free< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-51" name = "__codelineno-17-51" href = "#__codelineno-17-51" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-52" name = "__codelineno-17-52" href = "#__codelineno-17-52" > < / a >
< a id = "__codelineno-17-53" name = "__codelineno-17-53" href = "#__codelineno-17-53" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-17-54" name = "__codelineno-17-54" href = "#__codelineno-17-54" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > size< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-55" name = "__codelineno-17-55" href = "#__codelineno-17-55" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-56" name = "__codelineno-17-56" href = "#__codelineno-17-56" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-57" name = "__codelineno-17-57" href = "#__codelineno-17-57" > < / a >
< a id = "__codelineno-17-58" name = "__codelineno-17-58" href = "#__codelineno-17-58" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-17-59" name = "__codelineno-17-59" href = "#__codelineno-17-59" > < / a > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "nf" > empty< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-60" name = "__codelineno-17-60" href = "#__codelineno-17-60" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > size< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-61" name = "__codelineno-17-61" href = "#__codelineno-17-61" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-62" name = "__codelineno-17-62" href = "#__codelineno-17-62" > < / a >
< a id = "__codelineno-17-63" name = "__codelineno-17-63" href = "#__codelineno-17-63" > < / a > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-17-64" name = "__codelineno-17-64" href = "#__codelineno-17-64" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > push< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-65" name = "__codelineno-17-65" href = "#__codelineno-17-65" > < / a > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > newDoublyListNode< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-66" name = "__codelineno-17-66" href = "#__codelineno-17-66" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向node< / span >
< a id = "__codelineno-17-67" name = "__codelineno-17-67" href = "#__codelineno-17-67" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > empty< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ))< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-68" name = "__codelineno-17-68" href = "#__codelineno-17-68" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-69" name = "__codelineno-17-69" href = "#__codelineno-17-69" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-70" name = "__codelineno-17-70" href = "#__codelineno-17-70" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首入队操作< / span >
< a id = "__codelineno-17-71" name = "__codelineno-17-71" href = "#__codelineno-17-71" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-72" name = "__codelineno-17-72" href = "#__codelineno-17-72" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-17-73" name = "__codelineno-17-73" href = "#__codelineno-17-73" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-74" name = "__codelineno-17-74" href = "#__codelineno-17-74" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-75" name = "__codelineno-17-75" href = "#__codelineno-17-75" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-17-76" name = "__codelineno-17-76" href = "#__codelineno-17-76" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-77" name = "__codelineno-17-77" href = "#__codelineno-17-77" > < / a > < span class = "w" > < / span > < span class = "c1" > // 对尾入队操作< / span >
< a id = "__codelineno-17-78" name = "__codelineno-17-78" href = "#__codelineno-17-78" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-79" name = "__codelineno-17-79" href = "#__codelineno-17-79" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-17-80" name = "__codelineno-17-80" href = "#__codelineno-17-80" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-81" name = "__codelineno-17-81" href = "#__codelineno-17-81" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-82" name = "__codelineno-17-82" href = "#__codelineno-17-82" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-83" name = "__codelineno-17-83" href = "#__codelineno-17-83" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-84" name = "__codelineno-17-84" href = "#__codelineno-17-84" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-17-85" name = "__codelineno-17-85" href = "#__codelineno-17-85" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-86" name = "__codelineno-17-86" href = "#__codelineno-17-86" > < / a >
< a id = "__codelineno-17-87" name = "__codelineno-17-87" href = "#__codelineno-17-87" > < / a > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-17-88" name = "__codelineno-17-88" href = "#__codelineno-17-88" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-89" name = "__codelineno-17-89" href = "#__codelineno-17-89" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-90" name = "__codelineno-17-90" href = "#__codelineno-17-90" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-91" name = "__codelineno-17-91" href = "#__codelineno-17-91" > < / a >
< a id = "__codelineno-17-92" name = "__codelineno-17-92" href = "#__codelineno-17-92" > < / a > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-17-93" name = "__codelineno-17-93" href = "#__codelineno-17-93" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-94" name = "__codelineno-17-94" href = "#__codelineno-17-94" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-95" name = "__codelineno-17-95" href = "#__codelineno-17-95" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-96" name = "__codelineno-17-96" href = "#__codelineno-17-96" > < / a >
< a id = "__codelineno-17-97" name = "__codelineno-17-97" href = "#__codelineno-17-97" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-17-98" name = "__codelineno-17-98" href = "#__codelineno-17-98" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekFirst< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-99" name = "__codelineno-17-99" href = "#__codelineno-17-99" > < / a > < span class = "w" > < / span > < span class = "n" > assert< / span > < span class = "p" > (< / span > < span class = "n" > size< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-100" name = "__codelineno-17-100" href = "#__codelineno-17-100" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-101" name = "__codelineno-17-101" href = "#__codelineno-17-101" > < / a > < span class = "p" > }< / span >
2023-05-09 00:27:02 +08:00
< a id = "__codelineno-17-102" name = "__codelineno-17-102" href = "#__codelineno-17-102" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-17-103" name = "__codelineno-17-103" href = "#__codelineno-17-103" > < / a > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-17-104" name = "__codelineno-17-104" href = "#__codelineno-17-104" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekLast< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-105" name = "__codelineno-17-105" href = "#__codelineno-17-105" > < / a > < span class = "w" > < / span > < span class = "n" > assert< / span > < span class = "p" > (< / span > < span class = "n" > size< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-106" name = "__codelineno-17-106" href = "#__codelineno-17-106" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-107" name = "__codelineno-17-107" href = "#__codelineno-17-107" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-108" name = "__codelineno-17-108" href = "#__codelineno-17-108" > < / a >
< a id = "__codelineno-17-109" name = "__codelineno-17-109" href = "#__codelineno-17-109" > < / a > < span class = "cm" > /* 出队 */< / span >
< a id = "__codelineno-17-110" name = "__codelineno-17-110" href = "#__codelineno-17-110" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > pop< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-111" name = "__codelineno-17-111" href = "#__codelineno-17-111" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > empty< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ))< / span >
< a id = "__codelineno-17-112" name = "__codelineno-17-112" href = "#__codelineno-17-112" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "mi" > -1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-113" name = "__codelineno-17-113" href = "#__codelineno-17-113" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-114" name = "__codelineno-17-114" href = "#__codelineno-17-114" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首出队操作< / span >
< a id = "__codelineno-17-115" name = "__codelineno-17-115" href = "#__codelineno-17-115" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-116" name = "__codelineno-17-116" href = "#__codelineno-17-116" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存头节点值< / span >
< a id = "__codelineno-17-117" name = "__codelineno-17-117" href = "#__codelineno-17-117" > < / a > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-118" name = "__codelineno-17-118" href = "#__codelineno-17-118" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > fNext< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-119" name = "__codelineno-17-119" href = "#__codelineno-17-119" > < / a > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-120" name = "__codelineno-17-120" href = "#__codelineno-17-120" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-121" name = "__codelineno-17-121" href = "#__codelineno-17-121" > < / a > < span class = "w" > < / span > < span class = "n" > delDoublyListNode< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-122" name = "__codelineno-17-122" href = "#__codelineno-17-122" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-123" name = "__codelineno-17-123" href = "#__codelineno-17-123" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-17-124" name = "__codelineno-17-124" href = "#__codelineno-17-124" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-125" name = "__codelineno-17-125" href = "#__codelineno-17-125" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾出队操作< / span >
< a id = "__codelineno-17-126" name = "__codelineno-17-126" href = "#__codelineno-17-126" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-127" name = "__codelineno-17-127" href = "#__codelineno-17-127" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存尾节点值< / span >
< a id = "__codelineno-17-128" name = "__codelineno-17-128" href = "#__codelineno-17-128" > < / a > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-129" name = "__codelineno-17-129" href = "#__codelineno-17-129" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > rPrev< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-130" name = "__codelineno-17-130" href = "#__codelineno-17-130" > < / a > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-131" name = "__codelineno-17-131" href = "#__codelineno-17-131" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "o" > -> < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > NULL< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-132" name = "__codelineno-17-132" href = "#__codelineno-17-132" > < / a > < span class = "w" > < / span > < span class = "n" > delDoublyListNode< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-133" name = "__codelineno-17-133" href = "#__codelineno-17-133" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-134" name = "__codelineno-17-134" href = "#__codelineno-17-134" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-17-135" name = "__codelineno-17-135" href = "#__codelineno-17-135" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-136" name = "__codelineno-17-136" href = "#__codelineno-17-136" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-17-137" name = "__codelineno-17-137" href = "#__codelineno-17-137" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-17-138" name = "__codelineno-17-138" href = "#__codelineno-17-138" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-17-139" name = "__codelineno-17-139" href = "#__codelineno-17-139" > < / a >
< a id = "__codelineno-17-140" name = "__codelineno-17-140" href = "#__codelineno-17-140" > < / a > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-17-141" name = "__codelineno-17-141" href = "#__codelineno-17-141" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popFirst< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-142" name = "__codelineno-17-142" href = "#__codelineno-17-142" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-143" name = "__codelineno-17-143" href = "#__codelineno-17-143" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-144" name = "__codelineno-17-144" href = "#__codelineno-17-144" > < / a >
< a id = "__codelineno-17-145" name = "__codelineno-17-145" href = "#__codelineno-17-145" > < / a > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-17-146" name = "__codelineno-17-146" href = "#__codelineno-17-146" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popLast< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-147" name = "__codelineno-17-147" href = "#__codelineno-17-147" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-148" name = "__codelineno-17-148" href = "#__codelineno-17-148" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-17-149" name = "__codelineno-17-149" href = "#__codelineno-17-149" > < / a >
< a id = "__codelineno-17-150" name = "__codelineno-17-150" href = "#__codelineno-17-150" > < / a > < span class = "cm" > /* 打印队列 */< / span >
< a id = "__codelineno-17-151" name = "__codelineno-17-151" href = "#__codelineno-17-151" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > printLinkedListDeque< / span > < span class = "p" > (< / span > < span class = "n" > linkedListDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-152" name = "__codelineno-17-152" href = "#__codelineno-17-152" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > arr< / span > < span class = "p" > [< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-17-153" name = "__codelineno-17-153" href = "#__codelineno-17-153" > < / a > < span class = "w" > < / span > < span class = "c1" > // 拷贝链表中的数据到数组< / span >
< a id = "__codelineno-17-154" name = "__codelineno-17-154" href = "#__codelineno-17-154" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-155" name = "__codelineno-17-155" href = "#__codelineno-17-155" > < / a > < span class = "w" > < / span > < span class = "n" > doublyListNode< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-156" name = "__codelineno-17-156" href = "#__codelineno-17-156" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-157" name = "__codelineno-17-157" href = "#__codelineno-17-157" > < / a > < span class = "w" > < / span > < span class = "n" > arr< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-158" name = "__codelineno-17-158" href = "#__codelineno-17-158" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "o" > -> < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-159" name = "__codelineno-17-159" href = "#__codelineno-17-159" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-160" name = "__codelineno-17-160" href = "#__codelineno-17-160" > < / a > < span class = "w" > < / span > < span class = "n" > printArray< / span > < span class = "p" > (< / span > < span class = "n" > arr< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-17-161" name = "__codelineno-17-161" href = "#__codelineno-17-161" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > linkedlist_deque.cs< / span > < pre > < span > < / span > < code > < a id = "__codelineno-18-1" name = "__codelineno-18-1" href = "#__codelineno-18-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
< a id = "__codelineno-18-2" name = "__codelineno-18-2" href = "#__codelineno-18-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > ListNode< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-3" name = "__codelineno-18-3" href = "#__codelineno-18-3" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-18-4" name = "__codelineno-18-4" href = "#__codelineno-18-4" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点引用（指针）< / span >
< a id = "__codelineno-18-5" name = "__codelineno-18-5" href = "#__codelineno-18-5" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点引用（指针）< / span >
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< a id = "__codelineno-18-6" name = "__codelineno-18-6" href = "#__codelineno-18-6" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-18-7" name = "__codelineno-18-7" href = "#__codelineno-18-7" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "nf" > ListNode< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-8" name = "__codelineno-18-8" href = "#__codelineno-18-8" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-9" name = "__codelineno-18-9" href = "#__codelineno-18-9" > < / a > < span class = "w" > < / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-10" name = "__codelineno-18-10" href = "#__codelineno-18-10" > < / a > < span class = "w" > < / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-11" name = "__codelineno-18-11" href = "#__codelineno-18-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-12" name = "__codelineno-18-12" href = "#__codelineno-18-12" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-13" name = "__codelineno-18-13" href = "#__codelineno-18-13" > < / a >
< a id = "__codelineno-18-14" name = "__codelineno-18-14" href = "#__codelineno-18-14" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-18-15" name = "__codelineno-18-15" href = "#__codelineno-18-15" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > LinkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-16" name = "__codelineno-18-16" href = "#__codelineno-18-16" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 front, 尾节点 rear< / span >
< a id = "__codelineno-18-17" name = "__codelineno-18-17" href = "#__codelineno-18-17" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-18-18" name = "__codelineno-18-18" href = "#__codelineno-18-18" > < / a >
< a id = "__codelineno-18-19" name = "__codelineno-18-19" href = "#__codelineno-18-19" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "nf" > LinkedListDeque< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-20" name = "__codelineno-18-20" href = "#__codelineno-18-20" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-21" name = "__codelineno-18-21" href = "#__codelineno-18-21" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-22" name = "__codelineno-18-22" href = "#__codelineno-18-22" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-23" name = "__codelineno-18-23" href = "#__codelineno-18-23" > < / a >
< a id = "__codelineno-18-24" name = "__codelineno-18-24" href = "#__codelineno-18-24" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-18-25" name = "__codelineno-18-25" href = "#__codelineno-18-25" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-26" name = "__codelineno-18-26" href = "#__codelineno-18-26" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-27" name = "__codelineno-18-27" href = "#__codelineno-18-27" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-28" name = "__codelineno-18-28" href = "#__codelineno-18-28" > < / a >
< a id = "__codelineno-18-29" name = "__codelineno-18-29" href = "#__codelineno-18-29" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-18-30" name = "__codelineno-18-30" href = "#__codelineno-18-30" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-31" name = "__codelineno-18-31" href = "#__codelineno-18-31" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nf" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-32" name = "__codelineno-18-32" href = "#__codelineno-18-32" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-33" name = "__codelineno-18-33" href = "#__codelineno-18-33" > < / a >
< a id = "__codelineno-18-34" name = "__codelineno-18-34" href = "#__codelineno-18-34" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队操作 */< / span >
< a id = "__codelineno-18-35" name = "__codelineno-18-35" href = "#__codelineno-18-35" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "k" > void< / span > < span class = "w" > < / span > < span class = "nf" > push< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-36" name = "__codelineno-18-36" href = "#__codelineno-18-36" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-37" name = "__codelineno-18-37" href = "#__codelineno-18-37" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-18-38" name = "__codelineno-18-38" href = "#__codelineno-18-38" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-39" name = "__codelineno-18-39" href = "#__codelineno-18-39" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-40" name = "__codelineno-18-40" href = "#__codelineno-18-40" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-41" name = "__codelineno-18-41" href = "#__codelineno-18-41" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-42" name = "__codelineno-18-42" href = "#__codelineno-18-42" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首入队操作< / span >
< a id = "__codelineno-18-43" name = "__codelineno-18-43" href = "#__codelineno-18-43" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "nf" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-44" name = "__codelineno-18-44" href = "#__codelineno-18-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-18-45" name = "__codelineno-18-45" href = "#__codelineno-18-45" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-46" name = "__codelineno-18-46" href = "#__codelineno-18-46" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-47" name = "__codelineno-18-47" href = "#__codelineno-18-47" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点 < / span >
< a id = "__codelineno-18-48" name = "__codelineno-18-48" href = "#__codelineno-18-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-49" name = "__codelineno-18-49" href = "#__codelineno-18-49" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾入队操作< / span >
< a id = "__codelineno-18-50" name = "__codelineno-18-50" href = "#__codelineno-18-50" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-51" name = "__codelineno-18-51" href = "#__codelineno-18-51" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-18-52" name = "__codelineno-18-52" href = "#__codelineno-18-52" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-53" name = "__codelineno-18-53" href = "#__codelineno-18-53" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-54" name = "__codelineno-18-54" href = "#__codelineno-18-54" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-18-55" name = "__codelineno-18-55" href = "#__codelineno-18-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-18-56" name = "__codelineno-18-56" href = "#__codelineno-18-56" > < / a >
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< a id = "__codelineno-18-57" name = "__codelineno-18-57" href = "#__codelineno-18-57" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-18-58" name = "__codelineno-18-58" href = "#__codelineno-18-58" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-59" name = "__codelineno-18-59" href = "#__codelineno-18-59" > < / a >
< a id = "__codelineno-18-60" name = "__codelineno-18-60" href = "#__codelineno-18-60" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-18-61" name = "__codelineno-18-61" href = "#__codelineno-18-61" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "k" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-62" name = "__codelineno-18-62" href = "#__codelineno-18-62" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "k" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-63" name = "__codelineno-18-63" href = "#__codelineno-18-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-64" name = "__codelineno-18-64" href = "#__codelineno-18-64" > < / a >
< a id = "__codelineno-18-65" name = "__codelineno-18-65" href = "#__codelineno-18-65" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-18-66" name = "__codelineno-18-66" href = "#__codelineno-18-66" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "k" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-67" name = "__codelineno-18-67" href = "#__codelineno-18-67" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "k" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-68" name = "__codelineno-18-68" href = "#__codelineno-18-68" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-69" name = "__codelineno-18-69" href = "#__codelineno-18-69" > < / a >
< a id = "__codelineno-18-70" name = "__codelineno-18-70" href = "#__codelineno-18-70" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队操作 */< / span >
< a id = "__codelineno-18-71" name = "__codelineno-18-71" href = "#__codelineno-18-71" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > int?< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-72" name = "__codelineno-18-72" href = "#__codelineno-18-72" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若队列为空，直接返回 null< / span >
< a id = "__codelineno-18-73" name = "__codelineno-18-73" href = "#__codelineno-18-73" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-74" name = "__codelineno-18-74" href = "#__codelineno-18-74" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-75" name = "__codelineno-18-75" href = "#__codelineno-18-75" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-76" name = "__codelineno-18-76" href = "#__codelineno-18-76" > < / a >
< a id = "__codelineno-18-77" name = "__codelineno-18-77" href = "#__codelineno-18-77" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-78" name = "__codelineno-18-78" href = "#__codelineno-18-78" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首出队操作< / span >
< a id = "__codelineno-18-79" name = "__codelineno-18-79" href = "#__codelineno-18-79" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-80" name = "__codelineno-18-80" href = "#__codelineno-18-80" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存头节点值< / span >
< a id = "__codelineno-18-81" name = "__codelineno-18-81" href = "#__codelineno-18-81" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头节点< / span >
< a id = "__codelineno-18-82" name = "__codelineno-18-82" href = "#__codelineno-18-82" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-83" name = "__codelineno-18-83" href = "#__codelineno-18-83" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-84" name = "__codelineno-18-84" href = "#__codelineno-18-84" > < / a > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-85" name = "__codelineno-18-85" href = "#__codelineno-18-85" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-86" name = "__codelineno-18-86" href = "#__codelineno-18-86" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-87" name = "__codelineno-18-87" href = "#__codelineno-18-87" > < / a >
< a id = "__codelineno-18-88" name = "__codelineno-18-88" href = "#__codelineno-18-88" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-18-89" name = "__codelineno-18-89" href = "#__codelineno-18-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-90" name = "__codelineno-18-90" href = "#__codelineno-18-90" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾出队操作< / span >
< a id = "__codelineno-18-91" name = "__codelineno-18-91" href = "#__codelineno-18-91" > < / a > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-92" name = "__codelineno-18-92" href = "#__codelineno-18-92" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存尾节点值< / span >
< a id = "__codelineno-18-93" name = "__codelineno-18-93" href = "#__codelineno-18-93" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除尾节点< / span >
< a id = "__codelineno-18-94" name = "__codelineno-18-94" href = "#__codelineno-18-94" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-95" name = "__codelineno-18-95" href = "#__codelineno-18-95" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-96" name = "__codelineno-18-96" href = "#__codelineno-18-96" > < / a > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-97" name = "__codelineno-18-97" href = "#__codelineno-18-97" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-98" name = "__codelineno-18-98" href = "#__codelineno-18-98" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-99" name = "__codelineno-18-99" href = "#__codelineno-18-99" > < / a >
< a id = "__codelineno-18-100" name = "__codelineno-18-100" href = "#__codelineno-18-100" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-18-101" name = "__codelineno-18-101" href = "#__codelineno-18-101" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-102" name = "__codelineno-18-102" href = "#__codelineno-18-102" > < / a >
< a id = "__codelineno-18-103" name = "__codelineno-18-103" href = "#__codelineno-18-103" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-18-104" name = "__codelineno-18-104" href = "#__codelineno-18-104" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-105" name = "__codelineno-18-105" href = "#__codelineno-18-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-106" name = "__codelineno-18-106" href = "#__codelineno-18-106" > < / a >
< a id = "__codelineno-18-107" name = "__codelineno-18-107" href = "#__codelineno-18-107" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-18-108" name = "__codelineno-18-108" href = "#__codelineno-18-108" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int?< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-109" name = "__codelineno-18-109" href = "#__codelineno-18-109" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nf" > pop< / span > < span class = "p" > (< / span > < span class = "k" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-110" name = "__codelineno-18-110" href = "#__codelineno-18-110" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-111" name = "__codelineno-18-111" href = "#__codelineno-18-111" > < / a >
< a id = "__codelineno-18-112" name = "__codelineno-18-112" href = "#__codelineno-18-112" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-18-113" name = "__codelineno-18-113" href = "#__codelineno-18-113" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int?< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-114" name = "__codelineno-18-114" href = "#__codelineno-18-114" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nf" > pop< / span > < span class = "p" > (< / span > < span class = "k" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-115" name = "__codelineno-18-115" href = "#__codelineno-18-115" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-116" name = "__codelineno-18-116" href = "#__codelineno-18-116" > < / a >
< a id = "__codelineno-18-117" name = "__codelineno-18-117" href = "#__codelineno-18-117" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-18-118" name = "__codelineno-18-118" href = "#__codelineno-18-118" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int?< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-119" name = "__codelineno-18-119" href = "#__codelineno-18-119" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-120" name = "__codelineno-18-120" href = "#__codelineno-18-120" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-121" name = "__codelineno-18-121" href = "#__codelineno-18-121" > < / a >
< a id = "__codelineno-18-122" name = "__codelineno-18-122" href = "#__codelineno-18-122" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-18-123" name = "__codelineno-18-123" href = "#__codelineno-18-123" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int?< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-124" name = "__codelineno-18-124" href = "#__codelineno-18-124" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-125" name = "__codelineno-18-125" href = "#__codelineno-18-125" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-126" name = "__codelineno-18-126" href = "#__codelineno-18-126" > < / a >
< a id = "__codelineno-18-127" name = "__codelineno-18-127" href = "#__codelineno-18-127" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-18-128" name = "__codelineno-18-128" href = "#__codelineno-18-128" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "nf" > toArray< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-129" name = "__codelineno-18-129" href = "#__codelineno-18-129" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-130" name = "__codelineno-18-130" href = "#__codelineno-18-130" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > [< / span > < span class = "n" > size< / span > < span class = "p" > ()];< / span >
< a id = "__codelineno-18-131" name = "__codelineno-18-131" href = "#__codelineno-18-131" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > Length< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-132" name = "__codelineno-18-132" href = "#__codelineno-18-132" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-133" name = "__codelineno-18-133" href = "#__codelineno-18-133" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-134" name = "__codelineno-18-134" href = "#__codelineno-18-134" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-135" name = "__codelineno-18-135" href = "#__codelineno-18-135" > < / a >
< a id = "__codelineno-18-136" name = "__codelineno-18-136" href = "#__codelineno-18-136" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-137" name = "__codelineno-18-137" href = "#__codelineno-18-137" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-138" name = "__codelineno-18-138" href = "#__codelineno-18-138" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > linkedlist_deque.swift< / span > < pre > < span > < / span > < code > < a id = "__codelineno-19-1" name = "__codelineno-19-1" href = "#__codelineno-19-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
< a id = "__codelineno-19-2" name = "__codelineno-19-2" href = "#__codelineno-19-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > ListNode< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-3" name = "__codelineno-19-3" href = "#__codelineno-19-3" > < / a > < span class = "kd" > var< / span > < span class = "nv" > val< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-19-4" name = "__codelineno-19-4" href = "#__codelineno-19-4" > < / a > < span class = "kd" > var< / span > < span class = "nv" > next< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "p" > ?< / span > < span class = "c1" > // 后继节点引用（指针）< / span >
< a id = "__codelineno-19-5" name = "__codelineno-19-5" href = "#__codelineno-19-5" > < / a > < span class = "kd" > var< / span > < span class = "nv" > prev< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "p" > ?< / span > < span class = "c1" > // 前驱节点引用（指针）< / span >
< a id = "__codelineno-19-6" name = "__codelineno-19-6" href = "#__codelineno-19-6" > < / a >
< a id = "__codelineno-19-7" name = "__codelineno-19-7" href = "#__codelineno-19-7" > < / a > < span class = "kd" > init< / span > < span class = "p" > (< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-8" name = "__codelineno-19-8" href = "#__codelineno-19-8" > < / a > < span class = "kc" > self< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > =< / span > < span class = "n" > val< / span >
< a id = "__codelineno-19-9" name = "__codelineno-19-9" href = "#__codelineno-19-9" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-10" name = "__codelineno-19-10" href = "#__codelineno-19-10" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-11" name = "__codelineno-19-11" href = "#__codelineno-19-11" > < / a >
< a id = "__codelineno-19-12" name = "__codelineno-19-12" href = "#__codelineno-19-12" > < / a > < span class = "cm" > /* 基于双向链表实现的双向队列 */< / span >
< a id = "__codelineno-19-13" name = "__codelineno-19-13" href = "#__codelineno-19-13" > < / a > < span class = "kd" > class< / span > < span class = "nc" > LinkedListDeque< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-14" name = "__codelineno-19-14" href = "#__codelineno-19-14" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > front< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "p" > ?< / span > < span class = "c1" > // 头节点 front< / span >
< a id = "__codelineno-19-15" name = "__codelineno-19-15" href = "#__codelineno-19-15" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > rear< / span > < span class = "p" > :< / span > < span class = "n" > ListNode< / span > < span class = "p" > ?< / span > < span class = "c1" > // 尾节点 rear< / span >
< a id = "__codelineno-19-16" name = "__codelineno-19-16" href = "#__codelineno-19-16" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > queSize< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-19-17" name = "__codelineno-19-17" href = "#__codelineno-19-17" > < / a >
< a id = "__codelineno-19-18" name = "__codelineno-19-18" href = "#__codelineno-19-18" > < / a > < span class = "kd" > init< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-19" name = "__codelineno-19-19" href = "#__codelineno-19-19" > < / a > < span class = "n" > queSize< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-19-20" name = "__codelineno-19-20" href = "#__codelineno-19-20" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-21" name = "__codelineno-19-21" href = "#__codelineno-19-21" > < / a >
< a id = "__codelineno-19-22" name = "__codelineno-19-22" href = "#__codelineno-19-22" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-19-23" name = "__codelineno-19-23" href = "#__codelineno-19-23" > < / a > < span class = "kd" > func< / span > < span class = "nf" > size< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-24" name = "__codelineno-19-24" href = "#__codelineno-19-24" > < / a > < span class = "n" > queSize< / span >
< a id = "__codelineno-19-25" name = "__codelineno-19-25" href = "#__codelineno-19-25" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-26" name = "__codelineno-19-26" href = "#__codelineno-19-26" > < / a >
< a id = "__codelineno-19-27" name = "__codelineno-19-27" href = "#__codelineno-19-27" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-19-28" name = "__codelineno-19-28" href = "#__codelineno-19-28" > < / a > < span class = "kd" > func< / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Bool< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-29" name = "__codelineno-19-29" href = "#__codelineno-19-29" > < / a > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "p" > ==< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-19-30" name = "__codelineno-19-30" href = "#__codelineno-19-30" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-31" name = "__codelineno-19-31" href = "#__codelineno-19-31" > < / a >
< a id = "__codelineno-19-32" name = "__codelineno-19-32" href = "#__codelineno-19-32" > < / a > < span class = "cm" > /* 入队操作 */< / span >
< a id = "__codelineno-19-33" name = "__codelineno-19-33" href = "#__codelineno-19-33" > < / a > < span class = "kd" > private< / span > < span class = "kd" > func< / span > < span class = "nf" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > ,< / span > < span class = "n" > isFront< / span > < span class = "p" > :< / span > < span class = "nb" > Bool< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-34" name = "__codelineno-19-34" href = "#__codelineno-19-34" > < / a > < span class = "kd" > let< / span > < span class = "nv" > node< / span > < span class = "p" > =< / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "n" > num< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-35" name = "__codelineno-19-35" href = "#__codelineno-19-35" > < / a > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-19-36" name = "__codelineno-19-36" href = "#__codelineno-19-36" > < / a > < span class = "k" > if< / span > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-37" name = "__codelineno-19-37" href = "#__codelineno-19-37" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-19-38" name = "__codelineno-19-38" href = "#__codelineno-19-38" > < / a > < span class = "n" > rear< / span > < span class = "p" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-19-39" name = "__codelineno-19-39" href = "#__codelineno-19-39" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-40" name = "__codelineno-19-40" href = "#__codelineno-19-40" > < / a > < span class = "c1" > // 队首入队操作< / span >
< a id = "__codelineno-19-41" name = "__codelineno-19-41" href = "#__codelineno-19-41" > < / a > < span class = "k" > else< / span > < span class = "k" > if< / span > < span class = "n" > isFront< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-42" name = "__codelineno-19-42" href = "#__codelineno-19-42" > < / a > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-19-43" name = "__codelineno-19-43" href = "#__codelineno-19-43" > < / a > < span class = "n" > front< / span > < span class = "p" > ?.< / span > < span class = "n" > prev< / span > < span class = "p" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-19-44" name = "__codelineno-19-44" href = "#__codelineno-19-44" > < / a > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > =< / span > < span class = "n" > front< / span >
< a id = "__codelineno-19-45" name = "__codelineno-19-45" href = "#__codelineno-19-45" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "n" > node< / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-19-46" name = "__codelineno-19-46" href = "#__codelineno-19-46" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-47" name = "__codelineno-19-47" href = "#__codelineno-19-47" > < / a > < span class = "c1" > // 队尾入队操作< / span >
< a id = "__codelineno-19-48" name = "__codelineno-19-48" href = "#__codelineno-19-48" > < / a > < span class = "k" > else< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-49" name = "__codelineno-19-49" href = "#__codelineno-19-49" > < / a > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-19-50" name = "__codelineno-19-50" href = "#__codelineno-19-50" > < / a > < span class = "n" > rear< / span > < span class = "p" > ?.< / span > < span class = "n" > next< / span > < span class = "p" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-19-51" name = "__codelineno-19-51" href = "#__codelineno-19-51" > < / a > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "p" > =< / span > < span class = "n" > rear< / span >
< a id = "__codelineno-19-52" name = "__codelineno-19-52" href = "#__codelineno-19-52" > < / a > < span class = "n" > rear< / span > < span class = "p" > =< / span > < span class = "n" > node< / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-19-53" name = "__codelineno-19-53" href = "#__codelineno-19-53" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-54" name = "__codelineno-19-54" href = "#__codelineno-19-54" > < / a > < span class = "n" > queSize< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-19-55" name = "__codelineno-19-55" href = "#__codelineno-19-55" > < / a > < span class = "p" > }< / span >
2023-03-01 03:51:21 +08:00
< a id = "__codelineno-19-56" name = "__codelineno-19-56" href = "#__codelineno-19-56" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-19-57" name = "__codelineno-19-57" href = "#__codelineno-19-57" > < / a > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-19-58" name = "__codelineno-19-58" href = "#__codelineno-19-58" > < / a > < span class = "kd" > func< / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-59" name = "__codelineno-19-59" href = "#__codelineno-19-59" > < / a > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "n" > isFront< / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-60" name = "__codelineno-19-60" href = "#__codelineno-19-60" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-61" name = "__codelineno-19-61" href = "#__codelineno-19-61" > < / a >
< a id = "__codelineno-19-62" name = "__codelineno-19-62" href = "#__codelineno-19-62" > < / a > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-19-63" name = "__codelineno-19-63" href = "#__codelineno-19-63" > < / a > < span class = "kd" > func< / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-64" name = "__codelineno-19-64" href = "#__codelineno-19-64" > < / a > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "n" > isFront< / span > < span class = "p" > :< / span > < span class = "kc" > false< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-65" name = "__codelineno-19-65" href = "#__codelineno-19-65" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-66" name = "__codelineno-19-66" href = "#__codelineno-19-66" > < / a >
< a id = "__codelineno-19-67" name = "__codelineno-19-67" href = "#__codelineno-19-67" > < / a > < span class = "cm" > /* 出队操作 */< / span >
< a id = "__codelineno-19-68" name = "__codelineno-19-68" href = "#__codelineno-19-68" > < / a > < span class = "kd" > private< / span > < span class = "kd" > func< / span > < span class = "nf" > pop< / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > :< / span > < span class = "nb" > Bool< / span > < span class = "p" > )< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-69" name = "__codelineno-19-69" href = "#__codelineno-19-69" > < / a > < span class = "k" > if< / span > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-70" name = "__codelineno-19-70" href = "#__codelineno-19-70" > < / a > < span class = "bp" > fatalError< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-71" name = "__codelineno-19-71" href = "#__codelineno-19-71" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-72" name = "__codelineno-19-72" href = "#__codelineno-19-72" > < / a > < span class = "kd" > let< / span > < span class = "nv" > val< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span >
< a id = "__codelineno-19-73" name = "__codelineno-19-73" href = "#__codelineno-19-73" > < / a > < span class = "c1" > // 队首出队操作< / span >
< a id = "__codelineno-19-74" name = "__codelineno-19-74" href = "#__codelineno-19-74" > < / a > < span class = "k" > if< / span > < span class = "n" > isFront< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-75" name = "__codelineno-19-75" href = "#__codelineno-19-75" > < / a > < span class = "n" > val< / span > < span class = "p" > =< / span > < span class = "n" > front< / span > < span class = "p" > !.< / span > < span class = "n" > val< / span > < span class = "c1" > // 暂存头节点值< / span >
< a id = "__codelineno-19-76" name = "__codelineno-19-76" href = "#__codelineno-19-76" > < / a > < span class = "c1" > // 删除头节点< / span >
< a id = "__codelineno-19-77" name = "__codelineno-19-77" href = "#__codelineno-19-77" > < / a > < span class = "kd" > let< / span > < span class = "nv" > fNext< / span > < span class = "p" > =< / span > < span class = "n" > front< / span > < span class = "p" > ?.< / span > < span class = "n" > next< / span >
< a id = "__codelineno-19-78" name = "__codelineno-19-78" href = "#__codelineno-19-78" > < / a > < span class = "k" > if< / span > < span class = "n" > fNext< / span > < span class = "o" > !=< / span > < span class = "kc" > nil< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-79" name = "__codelineno-19-79" href = "#__codelineno-19-79" > < / a > < span class = "n" > fNext< / span > < span class = "p" > ?.< / span > < span class = "n" > prev< / span > < span class = "p" > =< / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-19-80" name = "__codelineno-19-80" href = "#__codelineno-19-80" > < / a > < span class = "n" > front< / span > < span class = "p" > ?.< / span > < span class = "n" > next< / span > < span class = "p" > =< / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-19-81" name = "__codelineno-19-81" href = "#__codelineno-19-81" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-82" name = "__codelineno-19-82" href = "#__codelineno-19-82" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "n" > fNext< / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-19-83" name = "__codelineno-19-83" href = "#__codelineno-19-83" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-84" name = "__codelineno-19-84" href = "#__codelineno-19-84" > < / a > < span class = "c1" > // 队尾出队操作< / span >
< a id = "__codelineno-19-85" name = "__codelineno-19-85" href = "#__codelineno-19-85" > < / a > < span class = "k" > else< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-86" name = "__codelineno-19-86" href = "#__codelineno-19-86" > < / a > < span class = "n" > val< / span > < span class = "p" > =< / span > < span class = "n" > rear< / span > < span class = "p" > !.< / span > < span class = "n" > val< / span > < span class = "c1" > // 暂存尾节点值< / span >
< a id = "__codelineno-19-87" name = "__codelineno-19-87" href = "#__codelineno-19-87" > < / a > < span class = "c1" > // 删除尾节点< / span >
< a id = "__codelineno-19-88" name = "__codelineno-19-88" href = "#__codelineno-19-88" > < / a > < span class = "kd" > let< / span > < span class = "nv" > rPrev< / span > < span class = "p" > =< / span > < span class = "n" > rear< / span > < span class = "p" > ?.< / span > < span class = "n" > prev< / span >
< a id = "__codelineno-19-89" name = "__codelineno-19-89" href = "#__codelineno-19-89" > < / a > < span class = "k" > if< / span > < span class = "n" > rPrev< / span > < span class = "o" > !=< / span > < span class = "kc" > nil< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-90" name = "__codelineno-19-90" href = "#__codelineno-19-90" > < / a > < span class = "n" > rPrev< / span > < span class = "p" > ?.< / span > < span class = "n" > next< / span > < span class = "p" > =< / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-19-91" name = "__codelineno-19-91" href = "#__codelineno-19-91" > < / a > < span class = "n" > rear< / span > < span class = "p" > ?.< / span > < span class = "n" > prev< / span > < span class = "p" > =< / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-19-92" name = "__codelineno-19-92" href = "#__codelineno-19-92" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-93" name = "__codelineno-19-93" href = "#__codelineno-19-93" > < / a > < span class = "n" > rear< / span > < span class = "p" > =< / span > < span class = "n" > rPrev< / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-19-94" name = "__codelineno-19-94" href = "#__codelineno-19-94" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-95" name = "__codelineno-19-95" href = "#__codelineno-19-95" > < / a > < span class = "n" > queSize< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-19-96" name = "__codelineno-19-96" href = "#__codelineno-19-96" > < / a > < span class = "k" > return< / span > < span class = "n" > val< / span >
< a id = "__codelineno-19-97" name = "__codelineno-19-97" href = "#__codelineno-19-97" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-98" name = "__codelineno-19-98" href = "#__codelineno-19-98" > < / a >
< a id = "__codelineno-19-99" name = "__codelineno-19-99" href = "#__codelineno-19-99" > < / a > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-19-100" name = "__codelineno-19-100" href = "#__codelineno-19-100" > < / a > < span class = "kd" > func< / span > < span class = "nf" > popFirst< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-101" name = "__codelineno-19-101" href = "#__codelineno-19-101" > < / a > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-102" name = "__codelineno-19-102" href = "#__codelineno-19-102" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-103" name = "__codelineno-19-103" href = "#__codelineno-19-103" > < / a >
< a id = "__codelineno-19-104" name = "__codelineno-19-104" href = "#__codelineno-19-104" > < / a > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-19-105" name = "__codelineno-19-105" href = "#__codelineno-19-105" > < / a > < span class = "kd" > func< / span > < span class = "nf" > popLast< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-106" name = "__codelineno-19-106" href = "#__codelineno-19-106" > < / a > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > :< / span > < span class = "kc" > false< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-107" name = "__codelineno-19-107" href = "#__codelineno-19-107" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-108" name = "__codelineno-19-108" href = "#__codelineno-19-108" > < / a >
< a id = "__codelineno-19-109" name = "__codelineno-19-109" href = "#__codelineno-19-109" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-19-110" name = "__codelineno-19-110" href = "#__codelineno-19-110" > < / a > < span class = "kd" > func< / span > < span class = "nf" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > ?< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-111" name = "__codelineno-19-111" href = "#__codelineno-19-111" > < / a > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > ?< / span > < span class = "kc" > nil< / span > < span class = "p" > :< / span > < span class = "n" > front< / span > < span class = "p" > ?.< / span > < span class = "n" > val< / span >
< a id = "__codelineno-19-112" name = "__codelineno-19-112" href = "#__codelineno-19-112" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-113" name = "__codelineno-19-113" href = "#__codelineno-19-113" > < / a >
< a id = "__codelineno-19-114" name = "__codelineno-19-114" href = "#__codelineno-19-114" > < / a > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-19-115" name = "__codelineno-19-115" href = "#__codelineno-19-115" > < / a > < span class = "kd" > func< / span > < span class = "nf" > peekLast< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > ?< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-116" name = "__codelineno-19-116" href = "#__codelineno-19-116" > < / a > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > ?< / span > < span class = "kc" > nil< / span > < span class = "p" > :< / span > < span class = "n" > rear< / span > < span class = "p" > ?.< / span > < span class = "n" > val< / span >
< a id = "__codelineno-19-117" name = "__codelineno-19-117" href = "#__codelineno-19-117" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-118" name = "__codelineno-19-118" href = "#__codelineno-19-118" > < / a >
< a id = "__codelineno-19-119" name = "__codelineno-19-119" href = "#__codelineno-19-119" > < / a > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-19-120" name = "__codelineno-19-120" href = "#__codelineno-19-120" > < / a > < span class = "kd" > func< / span > < span class = "nf" > toArray< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "p" > [< / span > < span class = "nb" > Int< / span > < span class = "p" > ]< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-121" name = "__codelineno-19-121" href = "#__codelineno-19-121" > < / a > < span class = "kd" > var< / span > < span class = "nv" > node< / span > < span class = "p" > =< / span > < span class = "n" > front< / span >
< a id = "__codelineno-19-122" name = "__codelineno-19-122" href = "#__codelineno-19-122" > < / a > < span class = "kd" > var< / span > < span class = "nv" > res< / span > < span class = "p" > =< / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "n" > repeating< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "bp" > count< / span > < span class = "p" > :< / span > < span class = "n" > size< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-19-123" name = "__codelineno-19-123" href = "#__codelineno-19-123" > < / a > < span class = "k" > for< / span > < span class = "n" > i< / span > < span class = "k" > in< / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "bp" > indices< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-124" name = "__codelineno-19-124" href = "#__codelineno-19-124" > < / a > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "p" > =< / span > < span class = "n" > node< / span > < span class = "p" > !.< / span > < span class = "n" > val< / span >
< a id = "__codelineno-19-125" name = "__codelineno-19-125" href = "#__codelineno-19-125" > < / a > < span class = "n" > node< / span > < span class = "p" > =< / span > < span class = "n" > node< / span > < span class = "p" > ?.< / span > < span class = "n" > next< / span >
< a id = "__codelineno-19-126" name = "__codelineno-19-126" href = "#__codelineno-19-126" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-127" name = "__codelineno-19-127" href = "#__codelineno-19-127" > < / a > < span class = "k" > return< / span > < span class = "n" > res< / span >
< a id = "__codelineno-19-128" name = "__codelineno-19-128" href = "#__codelineno-19-128" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-129" name = "__codelineno-19-129" href = "#__codelineno-19-129" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_deque.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-20-1" name = "__codelineno-20-1" href = "#__codelineno-20-1" > < / a > < span class = "c1" > // 双向链表节点< / span >
< a id = "__codelineno-20-2" name = "__codelineno-20-2" href = "#__codelineno-20-2" > < / a > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "kr" > comptime< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > type< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > type< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-3" name = "__codelineno-20-3" href = "#__codelineno-20-3" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-4" name = "__codelineno-20-4" href = "#__codelineno-20-4" > < / a > < span class = "w" > < / span > < span class = "kr" > const< / span > < span class = "w" > < / span > < span class = "n" > Self< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > @This< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-20-5" name = "__codelineno-20-5" href = "#__codelineno-20-5" > < / a >
< a id = "__codelineno-20-6" name = "__codelineno-20-6" href = "#__codelineno-20-6" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > undefined< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-20-7" name = "__codelineno-20-7" href = "#__codelineno-20-7" > < / a > < span class = "w" > < / span > < span class = "n" > next< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > ?*< / span > < span class = "n" > Self< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点引用（指针）< / span >
< a id = "__codelineno-20-8" name = "__codelineno-20-8" href = "#__codelineno-20-8" > < / a > < span class = "w" > < / span > < span class = "n" > prev< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > ?*< / span > < span class = "n" > Self< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点引用（指针）< / span >
< a id = "__codelineno-20-9" name = "__codelineno-20-9" href = "#__codelineno-20-9" > < / a >
< a id = "__codelineno-20-10" name = "__codelineno-20-10" href = "#__codelineno-20-10" > < / a > < span class = "w" > < / span > < span class = "c1" > // Initialize a list node with specific value< / span >
< a id = "__codelineno-20-11" name = "__codelineno-20-11" href = "#__codelineno-20-11" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > init< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > x< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > i32< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-12" name = "__codelineno-20-12" href = "#__codelineno-20-12" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > x< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-13" name = "__codelineno-20-13" href = "#__codelineno-20-13" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-14" name = "__codelineno-20-14" href = "#__codelineno-20-14" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-15" name = "__codelineno-20-15" href = "#__codelineno-20-15" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-16" name = "__codelineno-20-16" href = "#__codelineno-20-16" > < / a > < span class = "w" > < / span > < span class = "p" > };< / span >
< a id = "__codelineno-20-17" name = "__codelineno-20-17" href = "#__codelineno-20-17" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-20-18" name = "__codelineno-20-18" href = "#__codelineno-20-18" > < / a >
< a id = "__codelineno-20-19" name = "__codelineno-20-19" href = "#__codelineno-20-19" > < / a > < span class = "c1" > // 基于双向链表实现的双向队列< / span >
< a id = "__codelineno-20-20" name = "__codelineno-20-20" href = "#__codelineno-20-20" > < / a > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > LinkedListDeque< / span > < span class = "p" > (< / span > < span class = "kr" > comptime< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > type< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > type< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-21" name = "__codelineno-20-21" href = "#__codelineno-20-21" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-22" name = "__codelineno-20-22" href = "#__codelineno-20-22" > < / a > < span class = "w" > < / span > < span class = "kr" > const< / span > < span class = "w" > < / span > < span class = "n" > Self< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > @This< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-20-23" name = "__codelineno-20-23" href = "#__codelineno-20-23" > < / a >
< a id = "__codelineno-20-24" name = "__codelineno-20-24" href = "#__codelineno-20-24" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > ?*< / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "n" > T< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 front< / span >
< a id = "__codelineno-20-25" name = "__codelineno-20-25" href = "#__codelineno-20-25" > < / a > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > ?*< / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "n" > T< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "c1" > // 尾节点 rear< / span >
< a id = "__codelineno-20-26" name = "__codelineno-20-26" href = "#__codelineno-20-26" > < / a > < span class = "w" > < / span > < span class = "n" > que_size< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > usize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-20-27" name = "__codelineno-20-27" href = "#__codelineno-20-27" > < / a > < span class = "w" > < / span > < span class = "n" > mem_arena< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > ?< / span > < span class = "n" > std< / span > < span class = "p" > .< / span > < span class = "n" > heap< / span > < span class = "p" > .< / span > < span class = "n" > ArenaAllocator< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-20-28" name = "__codelineno-20-28" href = "#__codelineno-20-28" > < / a > < span class = "w" > < / span > < span class = "n" > mem_allocator< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > std< / span > < span class = "p" > .< / span > < span class = "n" > mem< / span > < span class = "p" > .< / span > < span class = "n" > Allocator< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > undefined< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "c1" > // 内存分配器< / span >
< a id = "__codelineno-20-29" name = "__codelineno-20-29" href = "#__codelineno-20-29" > < / a >
< a id = "__codelineno-20-30" name = "__codelineno-20-30" href = "#__codelineno-20-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 构造方法（分配内存+初始化队列）< / span >
< a id = "__codelineno-20-31" name = "__codelineno-20-31" href = "#__codelineno-20-31" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > init< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > allocator< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > std< / span > < span class = "p" > .< / span > < span class = "n" > mem< / span > < span class = "p" > .< / span > < span class = "n" > Allocator< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > !< / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-32" name = "__codelineno-20-32" href = "#__codelineno-20-32" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_arena< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-33" name = "__codelineno-20-33" href = "#__codelineno-20-33" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_arena< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > std< / span > < span class = "p" > .< / span > < span class = "n" > heap< / span > < span class = "p" > .< / span > < span class = "n" > ArenaAllocator< / span > < span class = "p" > .< / span > < span class = "n" > init< / span > < span class = "p" > (< / span > < span class = "n" > allocator< / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-34" name = "__codelineno-20-34" href = "#__codelineno-20-34" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_allocator< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_arena< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > allocator< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-20-35" name = "__codelineno-20-35" href = "#__codelineno-20-35" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-36" name = "__codelineno-20-36" href = "#__codelineno-20-36" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-37" name = "__codelineno-20-37" href = "#__codelineno-20-37" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-38" name = "__codelineno-20-38" href = "#__codelineno-20-38" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > que_size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-39" name = "__codelineno-20-39" href = "#__codelineno-20-39" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-40" name = "__codelineno-20-40" href = "#__codelineno-20-40" > < / a >
< a id = "__codelineno-20-41" name = "__codelineno-20-41" href = "#__codelineno-20-41" > < / a > < span class = "w" > < / span > < span class = "c1" > // 析构方法（释放内存）< / span >
< a id = "__codelineno-20-42" name = "__codelineno-20-42" href = "#__codelineno-20-42" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > deinit< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-43" name = "__codelineno-20-43" href = "#__codelineno-20-43" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_arena< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-44" name = "__codelineno-20-44" href = "#__codelineno-20-44" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_arena< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > deinit< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-20-45" name = "__codelineno-20-45" href = "#__codelineno-20-45" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-46" name = "__codelineno-20-46" href = "#__codelineno-20-46" > < / a >
< a id = "__codelineno-20-47" name = "__codelineno-20-47" href = "#__codelineno-20-47" > < / a > < span class = "w" > < / span > < span class = "c1" > // 获取双向队列的长度< / span >
< a id = "__codelineno-20-48" name = "__codelineno-20-48" href = "#__codelineno-20-48" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > usize< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-49" name = "__codelineno-20-49" href = "#__codelineno-20-49" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > que_size< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-50" name = "__codelineno-20-50" href = "#__codelineno-20-50" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-51" name = "__codelineno-20-51" href = "#__codelineno-20-51" > < / a >
< a id = "__codelineno-20-52" name = "__codelineno-20-52" href = "#__codelineno-20-52" > < / a > < span class = "w" > < / span > < span class = "c1" > // 判断双向队列是否为空< / span >
< a id = "__codelineno-20-53" name = "__codelineno-20-53" href = "#__codelineno-20-53" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-54" name = "__codelineno-20-54" href = "#__codelineno-20-54" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-55" name = "__codelineno-20-55" href = "#__codelineno-20-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-56" name = "__codelineno-20-56" href = "#__codelineno-20-56" > < / a >
< a id = "__codelineno-20-57" name = "__codelineno-20-57" href = "#__codelineno-20-57" > < / a > < span class = "w" > < / span > < span class = "c1" > // 入队操作< / span >
< a id = "__codelineno-20-58" name = "__codelineno-20-58" href = "#__codelineno-20-58" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > is_front< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > !< / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-59" name = "__codelineno-20-59" href = "#__codelineno-20-59" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > try< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_allocator< / span > < span class = "p" > .< / span > < span class = "n" > create< / span > < span class = "p" > (< / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "n" > T< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-20-60" name = "__codelineno-20-60" href = "#__codelineno-20-60" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > init< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-61" name = "__codelineno-20-61" href = "#__codelineno-20-61" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 front, rear 都指向 node< / span >
< a id = "__codelineno-20-62" name = "__codelineno-20-62" href = "#__codelineno-20-62" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-63" name = "__codelineno-20-63" href = "#__codelineno-20-63" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-64" name = "__codelineno-20-64" href = "#__codelineno-20-64" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-65" name = "__codelineno-20-65" href = "#__codelineno-20-65" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首入队操作< / span >
< a id = "__codelineno-20-66" name = "__codelineno-20-66" href = "#__codelineno-20-66" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > is_front< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-67" name = "__codelineno-20-67" href = "#__codelineno-20-67" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-20-68" name = "__codelineno-20-68" href = "#__codelineno-20-68" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-69" name = "__codelineno-20-69" href = "#__codelineno-20-69" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-70" name = "__codelineno-20-70" href = "#__codelineno-20-70" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-20-71" name = "__codelineno-20-71" href = "#__codelineno-20-71" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾入队操作< / span >
< a id = "__codelineno-20-72" name = "__codelineno-20-72" href = "#__codelineno-20-72" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-73" name = "__codelineno-20-73" href = "#__codelineno-20-73" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-20-74" name = "__codelineno-20-74" href = "#__codelineno-20-74" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-75" name = "__codelineno-20-75" href = "#__codelineno-20-75" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-76" name = "__codelineno-20-76" href = "#__codelineno-20-76" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-20-77" name = "__codelineno-20-77" href = "#__codelineno-20-77" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-78" name = "__codelineno-20-78" href = "#__codelineno-20-78" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > que_size< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-20-79" name = "__codelineno-20-79" href = "#__codelineno-20-79" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-20-80" name = "__codelineno-20-80" href = "#__codelineno-20-80" > < / a >
< a id = "__codelineno-20-81" name = "__codelineno-20-81" href = "#__codelineno-20-81" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首入队< / span >
< a id = "__codelineno-20-82" name = "__codelineno-20-82" href = "#__codelineno-20-82" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > pushFirst< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > !< / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-83" name = "__codelineno-20-83" href = "#__codelineno-20-83" > < / a > < span class = "w" > < / span > < span class = "k" > try< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kc" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-84" name = "__codelineno-20-84" href = "#__codelineno-20-84" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-20-85" name = "__codelineno-20-85" href = "#__codelineno-20-85" > < / a >
< a id = "__codelineno-20-86" name = "__codelineno-20-86" href = "#__codelineno-20-86" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾入队< / span >
< a id = "__codelineno-20-87" name = "__codelineno-20-87" href = "#__codelineno-20-87" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > pushLast< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > !< / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-88" name = "__codelineno-20-88" href = "#__codelineno-20-88" > < / a > < span class = "w" > < / span > < span class = "k" > try< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kc" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-89" name = "__codelineno-20-89" href = "#__codelineno-20-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-20-90" name = "__codelineno-20-90" href = "#__codelineno-20-90" > < / a >
< a id = "__codelineno-20-91" name = "__codelineno-20-91" href = "#__codelineno-20-91" > < / a > < span class = "w" > < / span > < span class = "c1" > // 出队操作< / span >
< a id = "__codelineno-20-92" name = "__codelineno-20-92" href = "#__codelineno-20-92" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > is_front< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-93" name = "__codelineno-20-93" href = "#__codelineno-20-93" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "nb" > @panic< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-94" name = "__codelineno-20-94" href = "#__codelineno-20-94" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > undefined< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-95" name = "__codelineno-20-95" href = "#__codelineno-20-95" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首出队操作< / span >
< a id = "__codelineno-20-96" name = "__codelineno-20-96" href = "#__codelineno-20-96" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > is_front< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-97" name = "__codelineno-20-97" href = "#__codelineno-20-97" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存头节点值< / span >
< a id = "__codelineno-20-98" name = "__codelineno-20-98" href = "#__codelineno-20-98" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头节点< / span >
< a id = "__codelineno-20-99" name = "__codelineno-20-99" href = "#__codelineno-20-99" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-100" name = "__codelineno-20-100" href = "#__codelineno-20-100" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-101" name = "__codelineno-20-101" href = "#__codelineno-20-101" > < / a > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-102" name = "__codelineno-20-102" href = "#__codelineno-20-102" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-103" name = "__codelineno-20-103" href = "#__codelineno-20-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-104" name = "__codelineno-20-104" href = "#__codelineno-20-104" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-20-105" name = "__codelineno-20-105" href = "#__codelineno-20-105" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾出队操作< / span >
< a id = "__codelineno-20-106" name = "__codelineno-20-106" href = "#__codelineno-20-106" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-107" name = "__codelineno-20-107" href = "#__codelineno-20-107" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存尾节点值< / span >
< a id = "__codelineno-20-108" name = "__codelineno-20-108" href = "#__codelineno-20-108" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除尾节点< / span >
< a id = "__codelineno-20-109" name = "__codelineno-20-109" href = "#__codelineno-20-109" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-110" name = "__codelineno-20-110" href = "#__codelineno-20-110" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-111" name = "__codelineno-20-111" href = "#__codelineno-20-111" > < / a > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-112" name = "__codelineno-20-112" href = "#__codelineno-20-112" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-113" name = "__codelineno-20-113" href = "#__codelineno-20-113" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-114" name = "__codelineno-20-114" href = "#__codelineno-20-114" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-20-115" name = "__codelineno-20-115" href = "#__codelineno-20-115" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-116" name = "__codelineno-20-116" href = "#__codelineno-20-116" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > que_size< / span > < span class = "w" > < / span > < span class = "o" > -=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-20-117" name = "__codelineno-20-117" href = "#__codelineno-20-117" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-118" name = "__codelineno-20-118" href = "#__codelineno-20-118" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-20-119" name = "__codelineno-20-119" href = "#__codelineno-20-119" > < / a >
< a id = "__codelineno-20-120" name = "__codelineno-20-120" href = "#__codelineno-20-120" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首出队< / span >
< a id = "__codelineno-20-121" name = "__codelineno-20-121" href = "#__codelineno-20-121" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-122" name = "__codelineno-20-122" href = "#__codelineno-20-122" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-123" name = "__codelineno-20-123" href = "#__codelineno-20-123" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-20-124" name = "__codelineno-20-124" href = "#__codelineno-20-124" > < / a >
< a id = "__codelineno-20-125" name = "__codelineno-20-125" href = "#__codelineno-20-125" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾出队< / span >
< a id = "__codelineno-20-126" name = "__codelineno-20-126" href = "#__codelineno-20-126" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-127" name = "__codelineno-20-127" href = "#__codelineno-20-127" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-128" name = "__codelineno-20-128" href = "#__codelineno-20-128" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-20-129" name = "__codelineno-20-129" href = "#__codelineno-20-129" > < / a >
< a id = "__codelineno-20-130" name = "__codelineno-20-130" href = "#__codelineno-20-130" > < / a > < span class = "w" > < / span > < span class = "c1" > // 访问队首元素< / span >
< a id = "__codelineno-20-131" name = "__codelineno-20-131" href = "#__codelineno-20-131" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-132" name = "__codelineno-20-132" href = "#__codelineno-20-132" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "nb" > @panic< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-133" name = "__codelineno-20-133" href = "#__codelineno-20-133" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-134" name = "__codelineno-20-134" href = "#__codelineno-20-134" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-20-135" name = "__codelineno-20-135" href = "#__codelineno-20-135" > < / a >
< a id = "__codelineno-20-136" name = "__codelineno-20-136" href = "#__codelineno-20-136" > < / a > < span class = "w" > < / span > < span class = "c1" > // 访问队尾元素< / span >
< a id = "__codelineno-20-137" name = "__codelineno-20-137" href = "#__codelineno-20-137" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-138" name = "__codelineno-20-138" href = "#__codelineno-20-138" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "nb" > @panic< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-139" name = "__codelineno-20-139" href = "#__codelineno-20-139" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > rear< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-140" name = "__codelineno-20-140" href = "#__codelineno-20-140" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-141" name = "__codelineno-20-141" href = "#__codelineno-20-141" > < / a >
< a id = "__codelineno-20-142" name = "__codelineno-20-142" href = "#__codelineno-20-142" > < / a > < span class = "w" > < / span > < span class = "c1" > // 返回数组用于打印< / span >
< a id = "__codelineno-20-143" name = "__codelineno-20-143" href = "#__codelineno-20-143" > < / a > < span class = "w" > < / span > < span class = "kr" > pub< / span > < span class = "w" > < / span > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > toArray< / span > < span class = "p" > (< / span > < span class = "n" > self< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > Self< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > !< / span > < span class = "p" > []< / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-144" name = "__codelineno-20-144" href = "#__codelineno-20-144" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-145" name = "__codelineno-20-145" href = "#__codelineno-20-145" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > try< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > mem_allocator< / span > < span class = "p" > .< / span > < span class = "n" > alloc< / span > < span class = "p" > (< / span > < span class = "n" > T< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > size< / span > < span class = "p" > ());< / span >
< a id = "__codelineno-20-146" name = "__codelineno-20-146" href = "#__codelineno-20-146" > < / a > < span class = "w" > < / span > < span class = "n" > std< / span > < span class = "p" > .< / span > < span class = "n" > mem< / span > < span class = "p" > .< / span > < span class = "n" > set< / span > < span class = "p" > (< / span > < span class = "n" > T< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > @as< / span > < span class = "p" > (< / span > < span class = "n" > T< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-20-147" name = "__codelineno-20-147" href = "#__codelineno-20-147" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > usize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-148" name = "__codelineno-20-148" href = "#__codelineno-20-148" > < / a > < span class = "w" > < / span > < span class = "k" > while< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > len< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-149" name = "__codelineno-20-149" href = "#__codelineno-20-149" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-150" name = "__codelineno-20-150" href = "#__codelineno-20-150" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-151" name = "__codelineno-20-151" href = "#__codelineno-20-151" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-152" name = "__codelineno-20-152" href = "#__codelineno-20-152" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-153" name = "__codelineno-20-153" href = "#__codelineno-20-153" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-154" name = "__codelineno-20-154" href = "#__codelineno-20-154" > < / a > < span class = "w" > < / span > < span class = "p" > };< / span >
< a id = "__codelineno-20-155" name = "__codelineno-20-155" href = "#__codelineno-20-155" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_deque.dart< / span > < pre > < span > < / span > < code > < a id = "__codelineno-21-1" name = "__codelineno-21-1" href = "#__codelineno-21-1" > < / a > < span class = "cm" > /* 双向链表节点 */< / span >
< a id = "__codelineno-21-2" name = "__codelineno-21-2" href = "#__codelineno-21-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nc" > ListNode< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-3" name = "__codelineno-21-3" href = "#__codelineno-21-3" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 节点值< / span >
< a id = "__codelineno-21-4" name = "__codelineno-21-4" href = "#__codelineno-21-4" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > next< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 后继节点引用（指针）< / span >
< a id = "__codelineno-21-5" name = "__codelineno-21-5" href = "#__codelineno-21-5" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 前驱节点引用（指针）< / span >
< a id = "__codelineno-21-6" name = "__codelineno-21-6" href = "#__codelineno-21-6" > < / a >
< a id = "__codelineno-21-7" name = "__codelineno-21-7" href = "#__codelineno-21-7" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "p" > {< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "p" > });< / span >
< a id = "__codelineno-21-8" name = "__codelineno-21-8" href = "#__codelineno-21-8" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-21-9" name = "__codelineno-21-9" href = "#__codelineno-21-9" > < / a >
< a id = "__codelineno-21-10" name = "__codelineno-21-10" href = "#__codelineno-21-10" > < / a > < span class = "cm" > /* 基于双向链表实现的双向对列 */< / span >
< a id = "__codelineno-21-11" name = "__codelineno-21-11" href = "#__codelineno-21-11" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nc" > LinkedListDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-12" name = "__codelineno-21-12" href = "#__codelineno-21-12" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头节点 _front< / span >
< a id = "__codelineno-21-13" name = "__codelineno-21-13" href = "#__codelineno-21-13" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 尾节点 _rear< / span >
< a id = "__codelineno-21-14" name = "__codelineno-21-14" href = "#__codelineno-21-14" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列的长度< / span >
< a id = "__codelineno-21-15" name = "__codelineno-21-15" href = "#__codelineno-21-15" > < / a >
< a id = "__codelineno-21-16" name = "__codelineno-21-16" href = "#__codelineno-21-16" > < / a > < span class = "w" > < / span > < span class = "n" > LinkedListDeque< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-17" name = "__codelineno-21-17" href = "#__codelineno-21-17" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-18" name = "__codelineno-21-18" href = "#__codelineno-21-18" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > _rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-19" name = "__codelineno-21-19" href = "#__codelineno-21-19" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-20" name = "__codelineno-21-20" href = "#__codelineno-21-20" > < / a >
< a id = "__codelineno-21-21" name = "__codelineno-21-21" href = "#__codelineno-21-21" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列长度 */< / span >
< a id = "__codelineno-21-22" name = "__codelineno-21-22" href = "#__codelineno-21-22" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-23" name = "__codelineno-21-23" href = "#__codelineno-21-23" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > _queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-24" name = "__codelineno-21-24" href = "#__codelineno-21-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-25" name = "__codelineno-21-25" href = "#__codelineno-21-25" > < / a >
< a id = "__codelineno-21-26" name = "__codelineno-21-26" href = "#__codelineno-21-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-21-27" name = "__codelineno-21-27" href = "#__codelineno-21-27" > < / a > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-28" name = "__codelineno-21-28" href = "#__codelineno-21-28" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-29" name = "__codelineno-21-29" href = "#__codelineno-21-29" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-30" name = "__codelineno-21-30" href = "#__codelineno-21-30" > < / a >
< a id = "__codelineno-21-31" name = "__codelineno-21-31" href = "#__codelineno-21-31" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队操作 */< / span >
< a id = "__codelineno-21-32" name = "__codelineno-21-32" href = "#__codelineno-21-32" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-33" name = "__codelineno-21-33" href = "#__codelineno-21-33" > < / a > < span class = "w" > < / span > < span class = "kd" > final< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "p" > (< / span > < span class = "kt" > num< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-34" name = "__codelineno-21-34" href = "#__codelineno-21-34" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-35" name = "__codelineno-21-35" href = "#__codelineno-21-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若链表为空，则令 _front， < / span >
< a id = "__codelineno-21-36" name = "__codelineno-21-36" href = "#__codelineno-21-36" > < / a > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-37" name = "__codelineno-21-37" href = "#__codelineno-21-37" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-38" name = "__codelineno-21-38" href = "#__codelineno-21-38" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首入队操作< / span >
< a id = "__codelineno-21-39" name = "__codelineno-21-39" href = "#__codelineno-21-39" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表头部< / span >
< a id = "__codelineno-21-40" name = "__codelineno-21-40" href = "#__codelineno-21-40" > < / a > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-41" name = "__codelineno-21-41" href = "#__codelineno-21-41" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-42" name = "__codelineno-21-42" href = "#__codelineno-21-42" > < / a > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-21-43" name = "__codelineno-21-43" href = "#__codelineno-21-43" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-44" name = "__codelineno-21-44" href = "#__codelineno-21-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾入队操作< / span >
< a id = "__codelineno-21-45" name = "__codelineno-21-45" href = "#__codelineno-21-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 node 添加至链表尾部< / span >
< a id = "__codelineno-21-46" name = "__codelineno-21-46" href = "#__codelineno-21-46" > < / a > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-47" name = "__codelineno-21-47" href = "#__codelineno-21-47" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-48" name = "__codelineno-21-48" href = "#__codelineno-21-48" > < / a > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-21-49" name = "__codelineno-21-49" href = "#__codelineno-21-49" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-50" name = "__codelineno-21-50" href = "#__codelineno-21-50" > < / a > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-21-51" name = "__codelineno-21-51" href = "#__codelineno-21-51" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-52" name = "__codelineno-21-52" href = "#__codelineno-21-52" > < / a >
< a id = "__codelineno-21-53" name = "__codelineno-21-53" href = "#__codelineno-21-53" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-21-54" name = "__codelineno-21-54" href = "#__codelineno-21-54" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-55" name = "__codelineno-21-55" href = "#__codelineno-21-55" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "kt" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kc" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-56" name = "__codelineno-21-56" href = "#__codelineno-21-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-57" name = "__codelineno-21-57" href = "#__codelineno-21-57" > < / a >
< a id = "__codelineno-21-58" name = "__codelineno-21-58" href = "#__codelineno-21-58" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-21-59" name = "__codelineno-21-59" href = "#__codelineno-21-59" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-60" name = "__codelineno-21-60" href = "#__codelineno-21-60" > < / a > < span class = "w" > < / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "kt" > num< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kc" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-61" name = "__codelineno-21-61" href = "#__codelineno-21-61" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-62" name = "__codelineno-21-62" href = "#__codelineno-21-62" > < / a >
< a id = "__codelineno-21-63" name = "__codelineno-21-63" href = "#__codelineno-21-63" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队操作 */< / span >
< a id = "__codelineno-21-64" name = "__codelineno-21-64" href = "#__codelineno-21-64" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-65" name = "__codelineno-21-65" href = "#__codelineno-21-65" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若队列为空，直接返回 null< / span >
< a id = "__codelineno-21-66" name = "__codelineno-21-66" href = "#__codelineno-21-66" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-67" name = "__codelineno-21-67" href = "#__codelineno-21-67" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-68" name = "__codelineno-21-68" href = "#__codelineno-21-68" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-69" name = "__codelineno-21-69" href = "#__codelineno-21-69" > < / a > < span class = "w" > < / span > < span class = "kd" > final< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-70" name = "__codelineno-21-70" href = "#__codelineno-21-70" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isFront< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-71" name = "__codelineno-21-71" href = "#__codelineno-21-71" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首出队操作< / span >
< a id = "__codelineno-21-72" name = "__codelineno-21-72" href = "#__codelineno-21-72" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存头节点值< / span >
< a id = "__codelineno-21-73" name = "__codelineno-21-73" href = "#__codelineno-21-73" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头节点< / span >
< a id = "__codelineno-21-74" name = "__codelineno-21-74" href = "#__codelineno-21-74" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-75" name = "__codelineno-21-75" href = "#__codelineno-21-75" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > fNext< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-76" name = "__codelineno-21-76" href = "#__codelineno-21-76" > < / a > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-77" name = "__codelineno-21-77" href = "#__codelineno-21-77" > < / a > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-78" name = "__codelineno-21-78" href = "#__codelineno-21-78" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-79" name = "__codelineno-21-79" href = "#__codelineno-21-79" > < / a > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > fNext< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新头节点< / span >
< a id = "__codelineno-21-80" name = "__codelineno-21-80" href = "#__codelineno-21-80" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-81" name = "__codelineno-21-81" href = "#__codelineno-21-81" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队尾出队操作< / span >
< a id = "__codelineno-21-82" name = "__codelineno-21-82" href = "#__codelineno-21-82" > < / a > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 暂存尾节点值< / span >
< a id = "__codelineno-21-83" name = "__codelineno-21-83" href = "#__codelineno-21-83" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除尾节点< / span >
< a id = "__codelineno-21-84" name = "__codelineno-21-84" href = "#__codelineno-21-84" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-85" name = "__codelineno-21-85" href = "#__codelineno-21-85" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > rPrev< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-86" name = "__codelineno-21-86" href = "#__codelineno-21-86" > < / a > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-87" name = "__codelineno-21-87" href = "#__codelineno-21-87" > < / a > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > prev< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-88" name = "__codelineno-21-88" href = "#__codelineno-21-88" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-89" name = "__codelineno-21-89" href = "#__codelineno-21-89" > < / a > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > rPrev< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新尾节点< / span >
< a id = "__codelineno-21-90" name = "__codelineno-21-90" href = "#__codelineno-21-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-91" name = "__codelineno-21-91" href = "#__codelineno-21-91" > < / a > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 更新队列长度< / span >
< a id = "__codelineno-21-92" name = "__codelineno-21-92" href = "#__codelineno-21-92" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-93" name = "__codelineno-21-93" href = "#__codelineno-21-93" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-94" name = "__codelineno-21-94" href = "#__codelineno-21-94" > < / a >
< a id = "__codelineno-21-95" name = "__codelineno-21-95" href = "#__codelineno-21-95" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-21-96" name = "__codelineno-21-96" href = "#__codelineno-21-96" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-97" name = "__codelineno-21-97" href = "#__codelineno-21-97" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > true< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-98" name = "__codelineno-21-98" href = "#__codelineno-21-98" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-99" name = "__codelineno-21-99" href = "#__codelineno-21-99" > < / a >
< a id = "__codelineno-21-100" name = "__codelineno-21-100" href = "#__codelineno-21-100" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-21-101" name = "__codelineno-21-101" href = "#__codelineno-21-101" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-102" name = "__codelineno-21-102" href = "#__codelineno-21-102" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > (< / span > < span class = "kc" > false< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-103" name = "__codelineno-21-103" href = "#__codelineno-21-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-104" name = "__codelineno-21-104" href = "#__codelineno-21-104" > < / a >
< a id = "__codelineno-21-105" name = "__codelineno-21-105" href = "#__codelineno-21-105" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-21-106" name = "__codelineno-21-106" href = "#__codelineno-21-106" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-107" name = "__codelineno-21-107" href = "#__codelineno-21-107" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-108" name = "__codelineno-21-108" href = "#__codelineno-21-108" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-109" name = "__codelineno-21-109" href = "#__codelineno-21-109" > < / a >
< a id = "__codelineno-21-110" name = "__codelineno-21-110" href = "#__codelineno-21-110" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-21-111" name = "__codelineno-21-111" href = "#__codelineno-21-111" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-112" name = "__codelineno-21-112" href = "#__codelineno-21-112" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _rear< / span > < span class = "o" > ?< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-113" name = "__codelineno-21-113" href = "#__codelineno-21-113" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-114" name = "__codelineno-21-114" href = "#__codelineno-21-114" > < / a >
< a id = "__codelineno-21-115" name = "__codelineno-21-115" href = "#__codelineno-21-115" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-21-116" name = "__codelineno-21-116" href = "#__codelineno-21-116" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > toArray< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-117" name = "__codelineno-21-117" href = "#__codelineno-21-117" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-118" name = "__codelineno-21-118" href = "#__codelineno-21-118" > < / a > < span class = "w" > < / span > < span class = "kd" > final< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-21-119" name = "__codelineno-21-119" href = "#__codelineno-21-119" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-120" name = "__codelineno-21-120" href = "#__codelineno-21-120" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > node< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-121" name = "__codelineno-21-121" href = "#__codelineno-21-121" > < / a > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > node< / span > < span class = "p" > .< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-122" name = "__codelineno-21-122" href = "#__codelineno-21-122" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-123" name = "__codelineno-21-123" href = "#__codelineno-21-123" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-124" name = "__codelineno-21-124" href = "#__codelineno-21-124" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-125" name = "__codelineno-21-125" href = "#__codelineno-21-125" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< / div >
< / div >
2023-02-16 02:20:55 +08:00
< h3 id = "_2" > 基于数组的实现< a class = "headerlink" href = "#_2" title = "Permanent link" > ¶ < / a > < / h3 >
2023-04-10 23:59:39 +08:00
< p > 与基于数组实现队列类似，我们也可以使用环形数组来实现双向队列。在队列的实现基础上，仅需增加“队首入队”和“队尾出队”的方法。< / p >
2023-03-13 21:51:34 +08:00
< div class = "tabbed-set tabbed-alternate" data-tabs = "4:5" > < input checked = "checked" id = "__tabbed_4_1" name = "__tabbed_4" type = "radio" / > < input id = "__tabbed_4_2" name = "__tabbed_4" type = "radio" / > < input id = "__tabbed_4_3" name = "__tabbed_4" type = "radio" / > < input id = "__tabbed_4_4" name = "__tabbed_4" type = "radio" / > < input id = "__tabbed_4_5" name = "__tabbed_4" type = "radio" / > < div class = "tabbed-labels" > < label for = "__tabbed_4_1" > ArrayDeque< / label > < label for = "__tabbed_4_2" > pushLast()< / label > < label for = "__tabbed_4_3" > pushFirst()< / label > < label for = "__tabbed_4_4" > popLast()< / label > < label for = "__tabbed_4_5" > popFirst()< / label > < / div >
2023-02-16 02:20:55 +08:00
< div class = "tabbed-content" >
< div class = "tabbed-block" >
2023-02-26 19:22:59 +08:00
< p > < img alt = "基于数组实现双向队列的入队出队操作" src = "../deque.assets/array_deque.png" / > < / p >
2023-02-16 02:20:55 +08:00
< / div >
< div class = "tabbed-block" >
< p > < img alt = "array_deque_push_last" src = "../deque.assets/array_deque_push_last.png" / > < / p >
< / div >
< div class = "tabbed-block" >
< p > < img alt = "array_deque_push_first" src = "../deque.assets/array_deque_push_first.png" / > < / p >
< / div >
< div class = "tabbed-block" >
2023-03-13 21:51:34 +08:00
< p > < img alt = "array_deque_pop_last" src = "../deque.assets/array_deque_pop_last.png" / > < / p >
2023-02-16 02:20:55 +08:00
< / div >
< div class = "tabbed-block" >
2023-03-13 21:51:34 +08:00
< p > < img alt = "array_deque_pop_first" src = "../deque.assets/array_deque_pop_first.png" / > < / p >
2023-02-16 02:20:55 +08:00
< / div >
< / div >
< / div >
< p > 以下是具体实现代码。< / p >
2023-06-02 02:38:32 +08:00
< div class = "tabbed-set tabbed-alternate" data-tabs = "5:11" > < input checked = "checked" id = "__tabbed_5_1" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_2" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_3" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_4" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_5" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_6" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_7" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_8" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_9" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_10" name = "__tabbed_5" type = "radio" / > < input id = "__tabbed_5_11" name = "__tabbed_5" type = "radio" / > < div class = "tabbed-labels" > < label for = "__tabbed_5_1" > Java< / label > < label for = "__tabbed_5_2" > C++< / label > < label for = "__tabbed_5_3" > Python< / label > < label for = "__tabbed_5_4" > Go< / label > < label for = "__tabbed_5_5" > JavaScript< / label > < label for = "__tabbed_5_6" > TypeScript< / label > < label for = "__tabbed_5_7" > C< / label > < label for = "__tabbed_5_8" > C#< / label > < label for = "__tabbed_5_9" > Swift< / label > < label for = "__tabbed_5_10" > Zig< / label > < label for = "__tabbed_5_11" > Dart< / label > < / div >
2023-02-16 02:20:55 +08:00
< div class = "tabbed-content" >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > array_deque.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-22-1" name = "__codelineno-22-1" href = "#__codelineno-22-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-22-2" name = "__codelineno-22-2" href = "#__codelineno-22-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > ArrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-3" name = "__codelineno-22-3" href = "#__codelineno-22-3" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > []< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-22-4" name = "__codelineno-22-4" href = "#__codelineno-22-4" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-22-5" name = "__codelineno-22-5" href = "#__codelineno-22-5" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列长度< / span >
< a id = "__codelineno-22-6" name = "__codelineno-22-6" href = "#__codelineno-22-6" > < / a >
< a id = "__codelineno-22-7" name = "__codelineno-22-7" href = "#__codelineno-22-7" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-22-8" name = "__codelineno-22-8" href = "#__codelineno-22-8" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "nf" > ArrayDeque< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-9" name = "__codelineno-22-9" href = "#__codelineno-22-9" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "na" > nums< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > [< / span > < span class = "n" > capacity< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-10" name = "__codelineno-22-10" href = "#__codelineno-22-10" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-11" name = "__codelineno-22-11" href = "#__codelineno-22-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-12" name = "__codelineno-22-12" href = "#__codelineno-22-12" > < / a >
< a id = "__codelineno-22-13" name = "__codelineno-22-13" href = "#__codelineno-22-13" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-22-14" name = "__codelineno-22-14" href = "#__codelineno-22-14" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > capacity< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-15" name = "__codelineno-22-15" href = "#__codelineno-22-15" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > .< / span > < span class = "na" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-16" name = "__codelineno-22-16" href = "#__codelineno-22-16" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-04-09 05:12:29 +08:00
< a id = "__codelineno-22-17" name = "__codelineno-22-17" href = "#__codelineno-22-17" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-22-18" name = "__codelineno-22-18" href = "#__codelineno-22-18" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-22-19" name = "__codelineno-22-19" href = "#__codelineno-22-19" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-20" name = "__codelineno-22-20" href = "#__codelineno-22-20" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-21" name = "__codelineno-22-21" href = "#__codelineno-22-21" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-22" name = "__codelineno-22-22" href = "#__codelineno-22-22" > < / a >
< a id = "__codelineno-22-23" name = "__codelineno-22-23" href = "#__codelineno-22-23" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-22-24" name = "__codelineno-22-24" href = "#__codelineno-22-24" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-25" name = "__codelineno-22-25" href = "#__codelineno-22-25" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-26" name = "__codelineno-22-26" href = "#__codelineno-22-26" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-27" name = "__codelineno-22-27" href = "#__codelineno-22-27" > < / a >
< a id = "__codelineno-22-28" name = "__codelineno-22-28" href = "#__codelineno-22-28" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-22-29" name = "__codelineno-22-29" href = "#__codelineno-22-29" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > index< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-30" name = "__codelineno-22-30" href = "#__codelineno-22-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-22-31" name = "__codelineno-22-31" href = "#__codelineno-22-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-22-32" name = "__codelineno-22-32" href = "#__codelineno-22-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-22-33" name = "__codelineno-22-33" href = "#__codelineno-22-33" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-22-34" name = "__codelineno-22-34" href = "#__codelineno-22-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-35" name = "__codelineno-22-35" href = "#__codelineno-22-35" > < / a >
< a id = "__codelineno-22-36" name = "__codelineno-22-36" href = "#__codelineno-22-36" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-22-37" name = "__codelineno-22-37" href = "#__codelineno-22-37" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-38" name = "__codelineno-22-38" href = "#__codelineno-22-38" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-39" name = "__codelineno-22-39" href = "#__codelineno-22-39" > < / a > < span class = "w" > < / span > < span class = "n" > System< / span > < span class = "p" > .< / span > < span class = "na" > out< / span > < span class = "p" > .< / span > < span class = "na" > println< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-22-40" name = "__codelineno-22-40" href = "#__codelineno-22-40" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-41" name = "__codelineno-22-41" href = "#__codelineno-22-41" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-42" name = "__codelineno-22-42" href = "#__codelineno-22-42" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-22-43" name = "__codelineno-22-43" href = "#__codelineno-22-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-22-44" name = "__codelineno-22-44" href = "#__codelineno-22-44" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-22-45" name = "__codelineno-22-45" href = "#__codelineno-22-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-22-46" name = "__codelineno-22-46" href = "#__codelineno-22-46" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "o" > [< / span > < span class = "n" > front< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-47" name = "__codelineno-22-47" href = "#__codelineno-22-47" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-48" name = "__codelineno-22-48" href = "#__codelineno-22-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-49" name = "__codelineno-22-49" href = "#__codelineno-22-49" > < / a >
< a id = "__codelineno-22-50" name = "__codelineno-22-50" href = "#__codelineno-22-50" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-22-51" name = "__codelineno-22-51" href = "#__codelineno-22-51" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-52" name = "__codelineno-22-52" href = "#__codelineno-22-52" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-53" name = "__codelineno-22-53" href = "#__codelineno-22-53" > < / a > < span class = "w" > < / span > < span class = "n" > System< / span > < span class = "p" > .< / span > < span class = "na" > out< / span > < span class = "p" > .< / span > < span class = "na" > println< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-22-54" name = "__codelineno-22-54" href = "#__codelineno-22-54" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-55" name = "__codelineno-22-55" href = "#__codelineno-22-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-56" name = "__codelineno-22-56" href = "#__codelineno-22-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-22-57" name = "__codelineno-22-57" href = "#__codelineno-22-57" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-22-58" name = "__codelineno-22-58" href = "#__codelineno-22-58" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-22-59" name = "__codelineno-22-59" href = "#__codelineno-22-59" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "o" > [< / span > < span class = "n" > rear< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-60" name = "__codelineno-22-60" href = "#__codelineno-22-60" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-61" name = "__codelineno-22-61" href = "#__codelineno-22-61" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-62" name = "__codelineno-22-62" href = "#__codelineno-22-62" > < / a >
< a id = "__codelineno-22-63" name = "__codelineno-22-63" href = "#__codelineno-22-63" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-22-64" name = "__codelineno-22-64" href = "#__codelineno-22-64" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-65" name = "__codelineno-22-65" href = "#__codelineno-22-65" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-22-66" name = "__codelineno-22-66" href = "#__codelineno-22-66" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-22-67" name = "__codelineno-22-67" href = "#__codelineno-22-67" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-22-68" name = "__codelineno-22-68" href = "#__codelineno-22-68" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-69" name = "__codelineno-22-69" href = "#__codelineno-22-69" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-70" name = "__codelineno-22-70" href = "#__codelineno-22-70" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-04-23 14:58:11 +08:00
< a id = "__codelineno-22-71" name = "__codelineno-22-71" href = "#__codelineno-22-71" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-22-72" name = "__codelineno-22-72" href = "#__codelineno-22-72" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-22-73" name = "__codelineno-22-73" href = "#__codelineno-22-73" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-74" name = "__codelineno-22-74" href = "#__codelineno-22-74" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-22-75" name = "__codelineno-22-75" href = "#__codelineno-22-75" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-76" name = "__codelineno-22-76" href = "#__codelineno-22-76" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-77" name = "__codelineno-22-77" href = "#__codelineno-22-77" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-78" name = "__codelineno-22-78" href = "#__codelineno-22-78" > < / a >
< a id = "__codelineno-22-79" name = "__codelineno-22-79" href = "#__codelineno-22-79" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-22-80" name = "__codelineno-22-80" href = "#__codelineno-22-80" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-81" name = "__codelineno-22-81" href = "#__codelineno-22-81" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-22-82" name = "__codelineno-22-82" href = "#__codelineno-22-82" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > IndexOutOfBoundsException< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-22-83" name = "__codelineno-22-83" href = "#__codelineno-22-83" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "o" > [< / span > < span class = "n" > front< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-84" name = "__codelineno-22-84" href = "#__codelineno-22-84" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-85" name = "__codelineno-22-85" href = "#__codelineno-22-85" > < / a >
< a id = "__codelineno-22-86" name = "__codelineno-22-86" href = "#__codelineno-22-86" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-22-87" name = "__codelineno-22-87" href = "#__codelineno-22-87" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-88" name = "__codelineno-22-88" href = "#__codelineno-22-88" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-22-89" name = "__codelineno-22-89" href = "#__codelineno-22-89" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > IndexOutOfBoundsException< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-22-90" name = "__codelineno-22-90" href = "#__codelineno-22-90" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-22-91" name = "__codelineno-22-91" href = "#__codelineno-22-91" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > last< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-22-92" name = "__codelineno-22-92" href = "#__codelineno-22-92" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "o" > [< / span > < span class = "n" > last< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-93" name = "__codelineno-22-93" href = "#__codelineno-22-93" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-94" name = "__codelineno-22-94" href = "#__codelineno-22-94" > < / a >
< a id = "__codelineno-22-95" name = "__codelineno-22-95" href = "#__codelineno-22-95" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-22-96" name = "__codelineno-22-96" href = "#__codelineno-22-96" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > []< / span > < span class = "w" > < / span > < span class = "nf" > toArray< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-97" name = "__codelineno-22-97" href = "#__codelineno-22-97" > < / a > < span class = "w" > < / span > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-22-98" name = "__codelineno-22-98" href = "#__codelineno-22-98" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > []< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "o" > [< / span > < span class = "n" > queSize< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-99" name = "__codelineno-22-99" href = "#__codelineno-22-99" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-22-100" name = "__codelineno-22-100" href = "#__codelineno-22-100" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "o" > [< / span > < span class = "n" > i< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "o" > [< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > j< / span > < span class = "p" > )< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-101" name = "__codelineno-22-101" href = "#__codelineno-22-101" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-102" name = "__codelineno-22-102" href = "#__codelineno-22-102" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-22-103" name = "__codelineno-22-103" href = "#__codelineno-22-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-22-104" name = "__codelineno-22-104" href = "#__codelineno-22-104" > < / a > < span class = "p" > }< / span >
2023-02-16 02:20:55 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > array_deque.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-23-1" name = "__codelineno-23-1" href = "#__codelineno-23-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-23-2" name = "__codelineno-23-2" href = "#__codelineno-23-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > ArrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-3" name = "__codelineno-23-3" href = "#__codelineno-23-3" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "o" > :< / span >
< a id = "__codelineno-23-4" name = "__codelineno-23-4" href = "#__codelineno-23-4" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-23-5" name = "__codelineno-23-5" href = "#__codelineno-23-5" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-23-6" name = "__codelineno-23-6" href = "#__codelineno-23-6" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列长度< / span >
< a id = "__codelineno-23-7" name = "__codelineno-23-7" href = "#__codelineno-23-7" > < / a >
< a id = "__codelineno-23-8" name = "__codelineno-23-8" href = "#__codelineno-23-8" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "o" > :< / span >
< a id = "__codelineno-23-9" name = "__codelineno-23-9" href = "#__codelineno-23-9" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-23-10" name = "__codelineno-23-10" href = "#__codelineno-23-10" > < / a > < span class = "w" > < / span > < span class = "n" > ArrayDeque< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-11" name = "__codelineno-23-11" href = "#__codelineno-23-11" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > .< / span > < span class = "n" > resize< / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-12" name = "__codelineno-23-12" href = "#__codelineno-23-12" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-13" name = "__codelineno-23-13" href = "#__codelineno-23-13" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-14" name = "__codelineno-23-14" href = "#__codelineno-23-14" > < / a >
< a id = "__codelineno-23-15" name = "__codelineno-23-15" href = "#__codelineno-23-15" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-23-16" name = "__codelineno-23-16" href = "#__codelineno-23-16" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-17" name = "__codelineno-23-17" href = "#__codelineno-23-17" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > .< / span > < span class = "n" > size< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-23-18" name = "__codelineno-23-18" href = "#__codelineno-23-18" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-19" name = "__codelineno-23-19" href = "#__codelineno-23-19" > < / a >
< a id = "__codelineno-23-20" name = "__codelineno-23-20" href = "#__codelineno-23-20" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-23-21" name = "__codelineno-23-21" href = "#__codelineno-23-21" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-22" name = "__codelineno-23-22" href = "#__codelineno-23-22" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-23" name = "__codelineno-23-23" href = "#__codelineno-23-23" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-24" name = "__codelineno-23-24" href = "#__codelineno-23-24" > < / a >
< a id = "__codelineno-23-25" name = "__codelineno-23-25" href = "#__codelineno-23-25" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-23-26" name = "__codelineno-23-26" href = "#__codelineno-23-26" > < / a > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-27" name = "__codelineno-23-27" href = "#__codelineno-23-27" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-28" name = "__codelineno-23-28" href = "#__codelineno-23-28" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-29" name = "__codelineno-23-29" href = "#__codelineno-23-29" > < / a >
< a id = "__codelineno-23-30" name = "__codelineno-23-30" href = "#__codelineno-23-30" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-23-31" name = "__codelineno-23-31" href = "#__codelineno-23-31" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-32" name = "__codelineno-23-32" href = "#__codelineno-23-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-23-33" name = "__codelineno-23-33" href = "#__codelineno-23-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-23-34" name = "__codelineno-23-34" href = "#__codelineno-23-34" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-23-35" name = "__codelineno-23-35" href = "#__codelineno-23-35" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-23-36" name = "__codelineno-23-36" href = "#__codelineno-23-36" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-37" name = "__codelineno-23-37" href = "#__codelineno-23-37" > < / a >
< a id = "__codelineno-23-38" name = "__codelineno-23-38" href = "#__codelineno-23-38" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-23-39" name = "__codelineno-23-39" href = "#__codelineno-23-39" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-40" name = "__codelineno-23-40" href = "#__codelineno-23-40" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-41" name = "__codelineno-23-41" href = "#__codelineno-23-41" > < / a > < span class = "w" > < / span > < span class = "n" > cout< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "s" > " 双向队列已满" < / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "n" > endl< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-42" name = "__codelineno-23-42" href = "#__codelineno-23-42" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-43" name = "__codelineno-23-43" href = "#__codelineno-23-43" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-44" name = "__codelineno-23-44" href = "#__codelineno-23-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-23-45" name = "__codelineno-23-45" href = "#__codelineno-23-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-23-46" name = "__codelineno-23-46" href = "#__codelineno-23-46" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-47" name = "__codelineno-23-47" href = "#__codelineno-23-47" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-23-48" name = "__codelineno-23-48" href = "#__codelineno-23-48" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > front< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-49" name = "__codelineno-23-49" href = "#__codelineno-23-49" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-50" name = "__codelineno-23-50" href = "#__codelineno-23-50" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-51" name = "__codelineno-23-51" href = "#__codelineno-23-51" > < / a >
< a id = "__codelineno-23-52" name = "__codelineno-23-52" href = "#__codelineno-23-52" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-23-53" name = "__codelineno-23-53" href = "#__codelineno-23-53" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-54" name = "__codelineno-23-54" href = "#__codelineno-23-54" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-55" name = "__codelineno-23-55" href = "#__codelineno-23-55" > < / a > < span class = "w" > < / span > < span class = "n" > cout< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "s" > " 双向队列已满" < / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "n" > endl< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-56" name = "__codelineno-23-56" href = "#__codelineno-23-56" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-57" name = "__codelineno-23-57" href = "#__codelineno-23-57" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-58" name = "__codelineno-23-58" href = "#__codelineno-23-58" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-23-59" name = "__codelineno-23-59" href = "#__codelineno-23-59" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-60" name = "__codelineno-23-60" href = "#__codelineno-23-60" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-23-61" name = "__codelineno-23-61" href = "#__codelineno-23-61" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > rear< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-62" name = "__codelineno-23-62" href = "#__codelineno-23-62" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-63" name = "__codelineno-23-63" href = "#__codelineno-23-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-64" name = "__codelineno-23-64" href = "#__codelineno-23-64" > < / a >
< a id = "__codelineno-23-65" name = "__codelineno-23-65" href = "#__codelineno-23-65" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-23-66" name = "__codelineno-23-66" href = "#__codelineno-23-66" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-67" name = "__codelineno-23-67" href = "#__codelineno-23-67" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-23-68" name = "__codelineno-23-68" href = "#__codelineno-23-68" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-23-69" name = "__codelineno-23-69" href = "#__codelineno-23-69" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-70" name = "__codelineno-23-70" href = "#__codelineno-23-70" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-71" name = "__codelineno-23-71" href = "#__codelineno-23-71" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-72" name = "__codelineno-23-72" href = "#__codelineno-23-72" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-73" name = "__codelineno-23-73" href = "#__codelineno-23-73" > < / a >
< a id = "__codelineno-23-74" name = "__codelineno-23-74" href = "#__codelineno-23-74" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-23-75" name = "__codelineno-23-75" href = "#__codelineno-23-75" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-76" name = "__codelineno-23-76" href = "#__codelineno-23-76" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-23-77" name = "__codelineno-23-77" href = "#__codelineno-23-77" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-78" name = "__codelineno-23-78" href = "#__codelineno-23-78" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-23-79" name = "__codelineno-23-79" href = "#__codelineno-23-79" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-80" name = "__codelineno-23-80" href = "#__codelineno-23-80" > < / a >
< a id = "__codelineno-23-81" name = "__codelineno-23-81" href = "#__codelineno-23-81" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-23-82" name = "__codelineno-23-82" href = "#__codelineno-23-82" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-83" name = "__codelineno-23-83" href = "#__codelineno-23-83" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-23-84" name = "__codelineno-23-84" href = "#__codelineno-23-84" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "n" > out_of_range< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-85" name = "__codelineno-23-85" href = "#__codelineno-23-85" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > front< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-23-86" name = "__codelineno-23-86" href = "#__codelineno-23-86" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-03-15 14:05:08 +08:00
< a id = "__codelineno-23-87" name = "__codelineno-23-87" href = "#__codelineno-23-87" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-23-88" name = "__codelineno-23-88" href = "#__codelineno-23-88" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-23-89" name = "__codelineno-23-89" href = "#__codelineno-23-89" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-90" name = "__codelineno-23-90" href = "#__codelineno-23-90" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-23-91" name = "__codelineno-23-91" href = "#__codelineno-23-91" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "n" > out_of_range< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-92" name = "__codelineno-23-92" href = "#__codelineno-23-92" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-23-93" name = "__codelineno-23-93" href = "#__codelineno-23-93" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > last< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-94" name = "__codelineno-23-94" href = "#__codelineno-23-94" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > last< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-23-95" name = "__codelineno-23-95" href = "#__codelineno-23-95" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-96" name = "__codelineno-23-96" href = "#__codelineno-23-96" > < / a >
< a id = "__codelineno-23-97" name = "__codelineno-23-97" href = "#__codelineno-23-97" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-23-98" name = "__codelineno-23-98" href = "#__codelineno-23-98" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > toVector< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-99" name = "__codelineno-23-99" href = "#__codelineno-23-99" > < / a > < span class = "w" > < / span > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-23-100" name = "__codelineno-23-100" href = "#__codelineno-23-100" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > (< / span > < span class = "n" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-23-101" name = "__codelineno-23-101" href = "#__codelineno-23-101" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-102" name = "__codelineno-23-102" href = "#__codelineno-23-102" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > j< / span > < span class = "p" > )];< / span >
< a id = "__codelineno-23-103" name = "__codelineno-23-103" href = "#__codelineno-23-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-104" name = "__codelineno-23-104" href = "#__codelineno-23-104" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-23-105" name = "__codelineno-23-105" href = "#__codelineno-23-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-23-106" name = "__codelineno-23-106" href = "#__codelineno-23-106" > < / a > < span class = "p" > };< / span >
2023-02-16 02:20:55 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > array_deque.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-24-1" name = "__codelineno-24-1" href = "#__codelineno-24-1" > < / a > < span class = "k" > class< / span > < span class = "nc" > ArrayDeque< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-2" name = "__codelineno-24-2" href = "#__codelineno-24-2" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 基于环形数组实现的双向队列" " " < / span >
< a id = "__codelineno-24-3" name = "__codelineno-24-3" href = "#__codelineno-24-3" > < / a >
< a id = "__codelineno-24-4" name = "__codelineno-24-4" href = "#__codelineno-24-4" > < / a > < span class = "k" > def< / span > < span class = "fm" > __init__< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > capacity< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-5" name = "__codelineno-24-5" href = "#__codelineno-24-5" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 构造方法" " " < / span >
< a id = "__codelineno-24-6" name = "__codelineno-24-6" href = "#__codelineno-24-6" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > :< / span > < span class = "nb" > list< / span > < span class = "p" > [< / span > < span class = "nb" > int< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ]< / span > < span class = "o" > *< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-24-7" name = "__codelineno-24-7" href = "#__codelineno-24-7" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-24-8" name = "__codelineno-24-8" href = "#__codelineno-24-8" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-24-9" name = "__codelineno-24-9" href = "#__codelineno-24-9" > < / a >
< a id = "__codelineno-24-10" name = "__codelineno-24-10" href = "#__codelineno-24-10" > < / a > < span class = "k" > def< / span > < span class = "nf" > capacity< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-11" name = "__codelineno-24-11" href = "#__codelineno-24-11" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 获取双向队列的容量" " " < / span >
< a id = "__codelineno-24-12" name = "__codelineno-24-12" href = "#__codelineno-24-12" > < / a > < span class = "k" > return< / span > < span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > )< / span >
2023-03-03 21:53:57 +08:00
< a id = "__codelineno-24-13" name = "__codelineno-24-13" href = "#__codelineno-24-13" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-24-14" name = "__codelineno-24-14" href = "#__codelineno-24-14" > < / a > < span class = "k" > def< / span > < span class = "nf" > size< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-15" name = "__codelineno-24-15" href = "#__codelineno-24-15" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 获取双向队列的长度" " " < / span >
< a id = "__codelineno-24-16" name = "__codelineno-24-16" href = "#__codelineno-24-16" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span >
< a id = "__codelineno-24-17" name = "__codelineno-24-17" href = "#__codelineno-24-17" > < / a >
< a id = "__codelineno-24-18" name = "__codelineno-24-18" href = "#__codelineno-24-18" > < / a > < span class = "k" > def< / span > < span class = "nf" > is_empty< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > bool< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-19" name = "__codelineno-24-19" href = "#__codelineno-24-19" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 判断双向队列是否为空" " " < / span >
< a id = "__codelineno-24-20" name = "__codelineno-24-20" href = "#__codelineno-24-20" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > ==< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-24-21" name = "__codelineno-24-21" href = "#__codelineno-24-21" > < / a >
< a id = "__codelineno-24-22" name = "__codelineno-24-22" href = "#__codelineno-24-22" > < / a > < span class = "k" > def< / span > < span class = "nf" > index< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > i< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-23" name = "__codelineno-24-23" href = "#__codelineno-24-23" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 计算环形数组索引" " " < / span >
< a id = "__codelineno-24-24" name = "__codelineno-24-24" href = "#__codelineno-24-24" > < / a > < span class = "c1" > # 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-24-25" name = "__codelineno-24-25" href = "#__codelineno-24-25" > < / a > < span class = "c1" > # 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-24-26" name = "__codelineno-24-26" href = "#__codelineno-24-26" > < / a > < span class = "c1" > # 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-24-27" name = "__codelineno-24-27" href = "#__codelineno-24-27" > < / a > < span class = "k" > return< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "o" > +< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "o" > %< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span >
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< a id = "__codelineno-24-28" name = "__codelineno-24-28" href = "#__codelineno-24-28" > < / a >
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< a id = "__codelineno-24-29" name = "__codelineno-24-29" href = "#__codelineno-24-29" > < / a > < span class = "k" > def< / span > < span class = "nf" > push_first< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-30" name = "__codelineno-24-30" href = "#__codelineno-24-30" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队首入队" " " < / span >
< a id = "__codelineno-24-31" name = "__codelineno-24-31" href = "#__codelineno-24-31" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > ==< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "p" > ():< / span >
< a id = "__codelineno-24-32" name = "__codelineno-24-32" href = "#__codelineno-24-32" > < / a > < span class = "nb" > print< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列已满" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-33" name = "__codelineno-24-33" href = "#__codelineno-24-33" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-24-34" name = "__codelineno-24-34" href = "#__codelineno-24-34" > < / a > < span class = "c1" > # 队首指针向左移动一位< / span >
< a id = "__codelineno-24-35" name = "__codelineno-24-35" href = "#__codelineno-24-35" > < / a > < span class = "c1" > # 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-24-36" name = "__codelineno-24-36" href = "#__codelineno-24-36" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-37" name = "__codelineno-24-37" href = "#__codelineno-24-37" > < / a > < span class = "c1" > # 将 num 添加至队首< / span >
< a id = "__codelineno-24-38" name = "__codelineno-24-38" href = "#__codelineno-24-38" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > [< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "n" > num< / span >
< a id = "__codelineno-24-39" name = "__codelineno-24-39" href = "#__codelineno-24-39" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-24-40" name = "__codelineno-24-40" href = "#__codelineno-24-40" > < / a >
< a id = "__codelineno-24-41" name = "__codelineno-24-41" href = "#__codelineno-24-41" > < / a > < span class = "k" > def< / span > < span class = "nf" > push_last< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-42" name = "__codelineno-24-42" href = "#__codelineno-24-42" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队尾入队" " " < / span >
< a id = "__codelineno-24-43" name = "__codelineno-24-43" href = "#__codelineno-24-43" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > ==< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "p" > ():< / span >
< a id = "__codelineno-24-44" name = "__codelineno-24-44" href = "#__codelineno-24-44" > < / a > < span class = "nb" > print< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列已满" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-45" name = "__codelineno-24-45" href = "#__codelineno-24-45" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-24-46" name = "__codelineno-24-46" href = "#__codelineno-24-46" > < / a > < span class = "c1" > # 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-24-47" name = "__codelineno-24-47" href = "#__codelineno-24-47" > < / a > < span class = "n" > rear< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > +< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-48" name = "__codelineno-24-48" href = "#__codelineno-24-48" > < / a > < span class = "c1" > # 将 num 添加至队尾< / span >
< a id = "__codelineno-24-49" name = "__codelineno-24-49" href = "#__codelineno-24-49" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > [< / span > < span class = "n" > rear< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "n" > num< / span >
< a id = "__codelineno-24-50" name = "__codelineno-24-50" href = "#__codelineno-24-50" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-24-51" name = "__codelineno-24-51" href = "#__codelineno-24-51" > < / a >
< a id = "__codelineno-24-52" name = "__codelineno-24-52" href = "#__codelineno-24-52" > < / a > < span class = "k" > def< / span > < span class = "nf" > pop_first< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-53" name = "__codelineno-24-53" href = "#__codelineno-24-53" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队首出队" " " < / span >
< a id = "__codelineno-24-54" name = "__codelineno-24-54" href = "#__codelineno-24-54" > < / a > < span class = "n" > num< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > peek_first< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-24-55" name = "__codelineno-24-55" href = "#__codelineno-24-55" > < / a > < span class = "c1" > # 队首指针向后移动一位< / span >
< a id = "__codelineno-24-56" name = "__codelineno-24-56" href = "#__codelineno-24-56" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > +< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-57" name = "__codelineno-24-57" href = "#__codelineno-24-57" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-24-58" name = "__codelineno-24-58" href = "#__codelineno-24-58" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-24-59" name = "__codelineno-24-59" href = "#__codelineno-24-59" > < / a >
< a id = "__codelineno-24-60" name = "__codelineno-24-60" href = "#__codelineno-24-60" > < / a > < span class = "k" > def< / span > < span class = "nf" > pop_last< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-61" name = "__codelineno-24-61" href = "#__codelineno-24-61" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 队尾出队" " " < / span >
< a id = "__codelineno-24-62" name = "__codelineno-24-62" href = "#__codelineno-24-62" > < / a > < span class = "n" > num< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > peek_last< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-24-63" name = "__codelineno-24-63" href = "#__codelineno-24-63" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-24-64" name = "__codelineno-24-64" href = "#__codelineno-24-64" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-24-65" name = "__codelineno-24-65" href = "#__codelineno-24-65" > < / a >
< a id = "__codelineno-24-66" name = "__codelineno-24-66" href = "#__codelineno-24-66" > < / a > < span class = "k" > def< / span > < span class = "nf" > peek_first< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-67" name = "__codelineno-24-67" href = "#__codelineno-24-67" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 访问队首元素" " " < / span >
< a id = "__codelineno-24-68" name = "__codelineno-24-68" href = "#__codelineno-24-68" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > is_empty< / span > < span class = "p" > ():< / span >
< a id = "__codelineno-24-69" name = "__codelineno-24-69" href = "#__codelineno-24-69" > < / a > < span class = "k" > raise< / span > < span class = "ne" > IndexError< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-70" name = "__codelineno-24-70" href = "#__codelineno-24-70" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > [< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-24-71" name = "__codelineno-24-71" href = "#__codelineno-24-71" > < / a >
< a id = "__codelineno-24-72" name = "__codelineno-24-72" href = "#__codelineno-24-72" > < / a > < span class = "k" > def< / span > < span class = "nf" > peek_last< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-24-73" name = "__codelineno-24-73" href = "#__codelineno-24-73" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 访问队尾元素" " " < / span >
< a id = "__codelineno-24-74" name = "__codelineno-24-74" href = "#__codelineno-24-74" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > is_empty< / span > < span class = "p" > ():< / span >
< a id = "__codelineno-24-75" name = "__codelineno-24-75" href = "#__codelineno-24-75" > < / a > < span class = "k" > raise< / span > < span class = "ne" > IndexError< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-76" name = "__codelineno-24-76" href = "#__codelineno-24-76" > < / a > < span class = "c1" > # 计算尾元素索引< / span >
< a id = "__codelineno-24-77" name = "__codelineno-24-77" href = "#__codelineno-24-77" > < / a > < span class = "n" > last< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > +< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-24-78" name = "__codelineno-24-78" href = "#__codelineno-24-78" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > [< / span > < span class = "n" > last< / span > < span class = "p" > ]< / span >
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< a id = "__codelineno-24-79" name = "__codelineno-24-79" href = "#__codelineno-24-79" > < / a >
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< a id = "__codelineno-24-80" name = "__codelineno-24-80" href = "#__codelineno-24-80" > < / a > < span class = "k" > def< / span > < span class = "nf" > to_array< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > list< / span > < span class = "p" > [< / span > < span class = "nb" > int< / span > < span class = "p" > ]:< / span >
< a id = "__codelineno-24-81" name = "__codelineno-24-81" href = "#__codelineno-24-81" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 返回数组用于打印" " " < / span >
< a id = "__codelineno-24-82" name = "__codelineno-24-82" href = "#__codelineno-24-82" > < / a > < span class = "c1" > # 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-24-83" name = "__codelineno-24-83" href = "#__codelineno-24-83" > < / a > < span class = "n" > res< / span > < span class = "o" > =< / span > < span class = "p" > []< / span >
< a id = "__codelineno-24-84" name = "__codelineno-24-84" href = "#__codelineno-24-84" > < / a > < span class = "k" > for< / span > < span class = "n" > i< / span > < span class = "ow" > in< / span > < span class = "nb" > range< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-24-85" name = "__codelineno-24-85" href = "#__codelineno-24-85" > < / a > < span class = "n" > res< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > [< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > +< / span > < span class = "n" > i< / span > < span class = "p" > )])< / span >
< a id = "__codelineno-24-86" name = "__codelineno-24-86" href = "#__codelineno-24-86" > < / a > < span class = "k" > return< / span > < span class = "n" > res< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > array_deque.go< / span > < pre > < span > < / span > < code > < a id = "__codelineno-25-1" name = "__codelineno-25-1" href = "#__codelineno-25-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-25-2" name = "__codelineno-25-2" href = "#__codelineno-25-2" > < / a > < span class = "kd" > type< / span > < span class = "w" > < / span > < span class = "nx" > arrayDeque< / span > < span class = "w" > < / span > < span class = "kd" > struct< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-3" name = "__codelineno-25-3" href = "#__codelineno-25-3" > < / a > < span class = "w" > < / span > < span class = "nx" > nums< / span > < span class = "w" > < / span > < span class = "p" > []< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-25-4" name = "__codelineno-25-4" href = "#__codelineno-25-4" > < / a > < span class = "w" > < / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-25-5" name = "__codelineno-25-5" href = "#__codelineno-25-5" > < / a > < span class = "w" > < / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列长度< / span >
< a id = "__codelineno-25-6" name = "__codelineno-25-6" href = "#__codelineno-25-6" > < / a > < span class = "w" > < / span > < span class = "nx" > queCapacity< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 队列容量（即最大容纳元素数量）< / span >
< a id = "__codelineno-25-7" name = "__codelineno-25-7" href = "#__codelineno-25-7" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-25-8" name = "__codelineno-25-8" href = "#__codelineno-25-8" > < / a >
< a id = "__codelineno-25-9" name = "__codelineno-25-9" href = "#__codelineno-25-9" > < / a > < span class = "cm" > /* 初始化队列 */< / span >
< a id = "__codelineno-25-10" name = "__codelineno-25-10" href = "#__codelineno-25-10" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "nx" > newArrayDeque< / span > < span class = "p" > (< / span > < span class = "nx" > queCapacity< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-11" name = "__codelineno-25-11" href = "#__codelineno-25-11" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-12" name = "__codelineno-25-12" href = "#__codelineno-25-12" > < / a > < span class = "w" > < / span > < span class = "nx" > nums< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "kt" > int< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > queCapacity< / span > < span class = "p" > ),< / span >
< a id = "__codelineno-25-13" name = "__codelineno-25-13" href = "#__codelineno-25-13" > < / a > < span class = "w" > < / span > < span class = "nx" > queCapacity< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > queCapacity< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-25-14" name = "__codelineno-25-14" href = "#__codelineno-25-14" > < / a > < span class = "w" > < / span > < span class = "nx" > front< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-25-15" name = "__codelineno-25-15" href = "#__codelineno-25-15" > < / a > < span class = "w" > < / span > < span class = "nx" > queSize< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-25-16" name = "__codelineno-25-16" href = "#__codelineno-25-16" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-17" name = "__codelineno-25-17" href = "#__codelineno-25-17" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-18" name = "__codelineno-25-18" href = "#__codelineno-25-18" > < / a >
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< a id = "__codelineno-25-19" name = "__codelineno-25-19" href = "#__codelineno-25-19" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-25-20" name = "__codelineno-25-20" href = "#__codelineno-25-20" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-21" name = "__codelineno-25-21" href = "#__codelineno-25-21" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span >
< a id = "__codelineno-25-22" name = "__codelineno-25-22" href = "#__codelineno-25-22" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-23" name = "__codelineno-25-23" href = "#__codelineno-25-23" > < / a >
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< a id = "__codelineno-25-24" name = "__codelineno-25-24" href = "#__codelineno-25-24" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-25-25" name = "__codelineno-25-25" href = "#__codelineno-25-25" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-26" name = "__codelineno-25-26" href = "#__codelineno-25-26" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-25-27" name = "__codelineno-25-27" href = "#__codelineno-25-27" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-28" name = "__codelineno-25-28" href = "#__codelineno-25-28" > < / a >
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< a id = "__codelineno-25-29" name = "__codelineno-25-29" href = "#__codelineno-25-29" > < / a > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-25-30" name = "__codelineno-25-30" href = "#__codelineno-25-30" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-31" name = "__codelineno-25-31" href = "#__codelineno-25-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-25-32" name = "__codelineno-25-32" href = "#__codelineno-25-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-25-33" name = "__codelineno-25-33" href = "#__codelineno-25-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-25-34" name = "__codelineno-25-34" href = "#__codelineno-25-34" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queCapacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queCapacity< / span >
< a id = "__codelineno-25-35" name = "__codelineno-25-35" href = "#__codelineno-25-35" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-36" name = "__codelineno-25-36" href = "#__codelineno-25-36" > < / a >
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< a id = "__codelineno-25-37" name = "__codelineno-25-37" href = "#__codelineno-25-37" > < / a > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-25-38" name = "__codelineno-25-38" href = "#__codelineno-25-38" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > pushFirst< / span > < span class = "p" > (< / span > < span class = "nx" > num< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-39" name = "__codelineno-25-39" href = "#__codelineno-25-39" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queCapacity< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-40" name = "__codelineno-25-40" href = "#__codelineno-25-40" > < / a > < span class = "w" > < / span > < span class = "nx" > fmt< / span > < span class = "p" > .< / span > < span class = "nx" > Println< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-25-41" name = "__codelineno-25-41" href = "#__codelineno-25-41" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span >
< a id = "__codelineno-25-42" name = "__codelineno-25-42" href = "#__codelineno-25-42" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-43" name = "__codelineno-25-43" href = "#__codelineno-25-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-25-44" name = "__codelineno-25-44" href = "#__codelineno-25-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-25-45" name = "__codelineno-25-45" href = "#__codelineno-25-45" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-25-46" name = "__codelineno-25-46" href = "#__codelineno-25-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-25-47" name = "__codelineno-25-47" href = "#__codelineno-25-47" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > num< / span >
< a id = "__codelineno-25-48" name = "__codelineno-25-48" href = "#__codelineno-25-48" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span >
< a id = "__codelineno-25-49" name = "__codelineno-25-49" href = "#__codelineno-25-49" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-50" name = "__codelineno-25-50" href = "#__codelineno-25-50" > < / a >
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< a id = "__codelineno-25-51" name = "__codelineno-25-51" href = "#__codelineno-25-51" > < / a > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-25-52" name = "__codelineno-25-52" href = "#__codelineno-25-52" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > pushLast< / span > < span class = "p" > (< / span > < span class = "nx" > num< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-53" name = "__codelineno-25-53" href = "#__codelineno-25-53" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queCapacity< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-54" name = "__codelineno-25-54" href = "#__codelineno-25-54" > < / a > < span class = "w" > < / span > < span class = "nx" > fmt< / span > < span class = "p" > .< / span > < span class = "nx" > Println< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-25-55" name = "__codelineno-25-55" href = "#__codelineno-25-55" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span >
< a id = "__codelineno-25-56" name = "__codelineno-25-56" href = "#__codelineno-25-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-57" name = "__codelineno-25-57" href = "#__codelineno-25-57" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-25-58" name = "__codelineno-25-58" href = "#__codelineno-25-58" > < / a > < span class = "w" > < / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "p" > )< / span >
< a id = "__codelineno-25-59" name = "__codelineno-25-59" href = "#__codelineno-25-59" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-25-60" name = "__codelineno-25-60" href = "#__codelineno-25-60" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > rear< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > num< / span >
< a id = "__codelineno-25-61" name = "__codelineno-25-61" href = "#__codelineno-25-61" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span >
< a id = "__codelineno-25-62" name = "__codelineno-25-62" href = "#__codelineno-25-62" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-63" name = "__codelineno-25-63" href = "#__codelineno-25-63" > < / a >
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< a id = "__codelineno-25-64" name = "__codelineno-25-64" href = "#__codelineno-25-64" > < / a > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-25-65" name = "__codelineno-25-65" href = "#__codelineno-25-65" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-66" name = "__codelineno-25-66" href = "#__codelineno-25-66" > < / a > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-25-67" name = "__codelineno-25-67" href = "#__codelineno-25-67" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-25-68" name = "__codelineno-25-68" href = "#__codelineno-25-68" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-25-69" name = "__codelineno-25-69" href = "#__codelineno-25-69" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span >
< a id = "__codelineno-25-70" name = "__codelineno-25-70" href = "#__codelineno-25-70" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > num< / span >
< a id = "__codelineno-25-71" name = "__codelineno-25-71" href = "#__codelineno-25-71" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-72" name = "__codelineno-25-72" href = "#__codelineno-25-72" > < / a >
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< a id = "__codelineno-25-73" name = "__codelineno-25-73" href = "#__codelineno-25-73" > < / a > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-25-74" name = "__codelineno-25-74" href = "#__codelineno-25-74" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-75" name = "__codelineno-25-75" href = "#__codelineno-25-75" > < / a > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > peekLast< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-25-76" name = "__codelineno-25-76" href = "#__codelineno-25-76" > < / a > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span >
< a id = "__codelineno-25-77" name = "__codelineno-25-77" href = "#__codelineno-25-77" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > num< / span >
< a id = "__codelineno-25-78" name = "__codelineno-25-78" href = "#__codelineno-25-78" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-25-79" name = "__codelineno-25-79" href = "#__codelineno-25-79" > < / a >
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< a id = "__codelineno-25-80" name = "__codelineno-25-80" href = "#__codelineno-25-80" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-25-81" name = "__codelineno-25-81" href = "#__codelineno-25-81" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-82" name = "__codelineno-25-82" href = "#__codelineno-25-82" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-83" name = "__codelineno-25-83" href = "#__codelineno-25-83" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
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< a id = "__codelineno-25-84" name = "__codelineno-25-84" href = "#__codelineno-25-84" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-25-85" name = "__codelineno-25-85" href = "#__codelineno-25-85" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-25-86" name = "__codelineno-25-86" href = "#__codelineno-25-86" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-25-87" name = "__codelineno-25-87" href = "#__codelineno-25-87" > < / a >
< a id = "__codelineno-25-88" name = "__codelineno-25-88" href = "#__codelineno-25-88" > < / a > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-25-89" name = "__codelineno-25-89" href = "#__codelineno-25-89" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-90" name = "__codelineno-25-90" href = "#__codelineno-25-90" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-91" name = "__codelineno-25-91" href = "#__codelineno-25-91" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
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< a id = "__codelineno-25-92" name = "__codelineno-25-92" href = "#__codelineno-25-92" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-25-93" name = "__codelineno-25-93" href = "#__codelineno-25-93" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-25-94" name = "__codelineno-25-94" href = "#__codelineno-25-94" > < / a > < span class = "w" > < / span > < span class = "nx" > last< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-25-95" name = "__codelineno-25-95" href = "#__codelineno-25-95" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > last< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-25-96" name = "__codelineno-25-96" href = "#__codelineno-25-96" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-25-97" name = "__codelineno-25-97" href = "#__codelineno-25-97" > < / a >
< a id = "__codelineno-25-98" name = "__codelineno-25-98" href = "#__codelineno-25-98" > < / a > < span class = "cm" > /* 获取 Slice 用于打印 */< / span >
< a id = "__codelineno-25-99" name = "__codelineno-25-99" href = "#__codelineno-25-99" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > q< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > arrayDeque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > toSlice< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > []< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-100" name = "__codelineno-25-100" href = "#__codelineno-25-100" > < / a > < span class = "w" > < / span > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-25-101" name = "__codelineno-25-101" href = "#__codelineno-25-101" > < / a > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "kt" > int< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "p" > )< / span >
< a id = "__codelineno-25-102" name = "__codelineno-25-102" href = "#__codelineno-25-102" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "p" > < < / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-25-103" name = "__codelineno-25-103" href = "#__codelineno-25-103" > < / a > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > q< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > j< / span > < span class = "p" > )]< / span >
< a id = "__codelineno-25-104" name = "__codelineno-25-104" href = "#__codelineno-25-104" > < / a > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "o" > ++< / span >
< a id = "__codelineno-25-105" name = "__codelineno-25-105" href = "#__codelineno-25-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-106" name = "__codelineno-25-106" href = "#__codelineno-25-106" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > res< / span >
< a id = "__codelineno-25-107" name = "__codelineno-25-107" href = "#__codelineno-25-107" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > array_deque.js< / span > < pre > < span > < / span > < code > < a id = "__codelineno-26-1" name = "__codelineno-26-1" href = "#__codelineno-26-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-26-2" name = "__codelineno-26-2" href = "#__codelineno-26-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > ArrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-3" name = "__codelineno-26-3" href = "#__codelineno-26-3" > < / a > < span class = "w" > < / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-26-4" name = "__codelineno-26-4" href = "#__codelineno-26-4" > < / a > < span class = "w" > < / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-26-5" name = "__codelineno-26-5" href = "#__codelineno-26-5" > < / a > < span class = "w" > < / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列长度< / span >
< a id = "__codelineno-26-6" name = "__codelineno-26-6" href = "#__codelineno-26-6" > < / a >
< a id = "__codelineno-26-7" name = "__codelineno-26-7" href = "#__codelineno-26-7" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-26-8" name = "__codelineno-26-8" href = "#__codelineno-26-8" > < / a > < span class = "w" > < / span > < span class = "kr" > constructor< / span > < span class = "p" > (< / span > < span class = "nx" > capacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-9" name = "__codelineno-26-9" href = "#__codelineno-26-9" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "nx" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-10" name = "__codelineno-26-10" href = "#__codelineno-26-10" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-11" name = "__codelineno-26-11" href = "#__codelineno-26-11" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-12" name = "__codelineno-26-12" href = "#__codelineno-26-12" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-13" name = "__codelineno-26-13" href = "#__codelineno-26-13" > < / a >
< a id = "__codelineno-26-14" name = "__codelineno-26-14" href = "#__codelineno-26-14" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-26-15" name = "__codelineno-26-15" href = "#__codelineno-26-15" > < / a > < span class = "w" > < / span > < span class = "nx" > capacity< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-16" name = "__codelineno-26-16" href = "#__codelineno-26-16" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-17" name = "__codelineno-26-17" href = "#__codelineno-26-17" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-18" name = "__codelineno-26-18" href = "#__codelineno-26-18" > < / a >
< a id = "__codelineno-26-19" name = "__codelineno-26-19" href = "#__codelineno-26-19" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-26-20" name = "__codelineno-26-20" href = "#__codelineno-26-20" > < / a > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-21" name = "__codelineno-26-21" href = "#__codelineno-26-21" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-22" name = "__codelineno-26-22" href = "#__codelineno-26-22" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-23" name = "__codelineno-26-23" href = "#__codelineno-26-23" > < / a >
< a id = "__codelineno-26-24" name = "__codelineno-26-24" href = "#__codelineno-26-24" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-26-25" name = "__codelineno-26-25" href = "#__codelineno-26-25" > < / a > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-26" name = "__codelineno-26-26" href = "#__codelineno-26-26" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-27" name = "__codelineno-26-27" href = "#__codelineno-26-27" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-28" name = "__codelineno-26-28" href = "#__codelineno-26-28" > < / a >
< a id = "__codelineno-26-29" name = "__codelineno-26-29" href = "#__codelineno-26-29" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-26-30" name = "__codelineno-26-30" href = "#__codelineno-26-30" > < / a > < span class = "w" > < / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > i< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-31" name = "__codelineno-26-31" href = "#__codelineno-26-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-26-32" name = "__codelineno-26-32" href = "#__codelineno-26-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-26-33" name = "__codelineno-26-33" href = "#__codelineno-26-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-26-34" name = "__codelineno-26-34" href = "#__codelineno-26-34" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-26-35" name = "__codelineno-26-35" href = "#__codelineno-26-35" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-04-22 01:35:59 +08:00
< a id = "__codelineno-26-36" name = "__codelineno-26-36" href = "#__codelineno-26-36" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-26-37" name = "__codelineno-26-37" href = "#__codelineno-26-37" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-26-38" name = "__codelineno-26-38" href = "#__codelineno-26-38" > < / a > < span class = "w" > < / span > < span class = "nx" > pushFirst< / span > < span class = "p" > (< / span > < span class = "nx" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-39" name = "__codelineno-26-39" href = "#__codelineno-26-39" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-40" name = "__codelineno-26-40" href = "#__codelineno-26-40" > < / a > < span class = "w" > < / span > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s1" > ' 双向队列已满' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-41" name = "__codelineno-26-41" href = "#__codelineno-26-41" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-42" name = "__codelineno-26-42" href = "#__codelineno-26-42" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-43" name = "__codelineno-26-43" href = "#__codelineno-26-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-26-44" name = "__codelineno-26-44" href = "#__codelineno-26-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-26-45" name = "__codelineno-26-45" href = "#__codelineno-26-45" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-46" name = "__codelineno-26-46" href = "#__codelineno-26-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-26-47" name = "__codelineno-26-47" href = "#__codelineno-26-47" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-48" name = "__codelineno-26-48" href = "#__codelineno-26-48" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-49" name = "__codelineno-26-49" href = "#__codelineno-26-49" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-50" name = "__codelineno-26-50" href = "#__codelineno-26-50" > < / a >
< a id = "__codelineno-26-51" name = "__codelineno-26-51" href = "#__codelineno-26-51" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-26-52" name = "__codelineno-26-52" href = "#__codelineno-26-52" > < / a > < span class = "w" > < / span > < span class = "nx" > pushLast< / span > < span class = "p" > (< / span > < span class = "nx" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-53" name = "__codelineno-26-53" href = "#__codelineno-26-53" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-54" name = "__codelineno-26-54" href = "#__codelineno-26-54" > < / a > < span class = "w" > < / span > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s1" > ' 双向队列已满' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-55" name = "__codelineno-26-55" href = "#__codelineno-26-55" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-56" name = "__codelineno-26-56" href = "#__codelineno-26-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-57" name = "__codelineno-26-57" href = "#__codelineno-26-57" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-26-58" name = "__codelineno-26-58" href = "#__codelineno-26-58" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-59" name = "__codelineno-26-59" href = "#__codelineno-26-59" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-26-60" name = "__codelineno-26-60" href = "#__codelineno-26-60" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > rear< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-61" name = "__codelineno-26-61" href = "#__codelineno-26-61" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-62" name = "__codelineno-26-62" href = "#__codelineno-26-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-63" name = "__codelineno-26-63" href = "#__codelineno-26-63" > < / a >
< a id = "__codelineno-26-64" name = "__codelineno-26-64" href = "#__codelineno-26-64" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-26-65" name = "__codelineno-26-65" href = "#__codelineno-26-65" > < / a > < span class = "w" > < / span > < span class = "nx" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-66" name = "__codelineno-26-66" href = "#__codelineno-26-66" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-26-67" name = "__codelineno-26-67" href = "#__codelineno-26-67" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-26-68" name = "__codelineno-26-68" href = "#__codelineno-26-68" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-69" name = "__codelineno-26-69" href = "#__codelineno-26-69" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-70" name = "__codelineno-26-70" href = "#__codelineno-26-70" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-71" name = "__codelineno-26-71" href = "#__codelineno-26-71" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-72" name = "__codelineno-26-72" href = "#__codelineno-26-72" > < / a >
< a id = "__codelineno-26-73" name = "__codelineno-26-73" href = "#__codelineno-26-73" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-26-74" name = "__codelineno-26-74" href = "#__codelineno-26-74" > < / a > < span class = "w" > < / span > < span class = "nx" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-75" name = "__codelineno-26-75" href = "#__codelineno-26-75" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > peekLast< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-26-76" name = "__codelineno-26-76" href = "#__codelineno-26-76" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-77" name = "__codelineno-26-77" href = "#__codelineno-26-77" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-78" name = "__codelineno-26-78" href = "#__codelineno-26-78" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-79" name = "__codelineno-26-79" href = "#__codelineno-26-79" > < / a >
< a id = "__codelineno-26-80" name = "__codelineno-26-80" href = "#__codelineno-26-80" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-26-81" name = "__codelineno-26-81" href = "#__codelineno-26-81" > < / a > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-82" name = "__codelineno-26-82" href = "#__codelineno-26-82" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "ne" > Error< / span > < span class = "p" > (< / span > < span class = "s1" > ' The Deque Is Empty.' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-83" name = "__codelineno-26-83" href = "#__codelineno-26-83" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-26-84" name = "__codelineno-26-84" href = "#__codelineno-26-84" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-85" name = "__codelineno-26-85" href = "#__codelineno-26-85" > < / a >
< a id = "__codelineno-26-86" name = "__codelineno-26-86" href = "#__codelineno-26-86" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-26-87" name = "__codelineno-26-87" href = "#__codelineno-26-87" > < / a > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-88" name = "__codelineno-26-88" href = "#__codelineno-26-88" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "ne" > Error< / span > < span class = "p" > (< / span > < span class = "s1" > ' The Deque Is Empty.' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-89" name = "__codelineno-26-89" href = "#__codelineno-26-89" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-26-90" name = "__codelineno-26-90" href = "#__codelineno-26-90" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > last< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-26-91" name = "__codelineno-26-91" href = "#__codelineno-26-91" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > last< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-26-92" name = "__codelineno-26-92" href = "#__codelineno-26-92" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-93" name = "__codelineno-26-93" href = "#__codelineno-26-93" > < / a >
< a id = "__codelineno-26-94" name = "__codelineno-26-94" href = "#__codelineno-26-94" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-26-95" name = "__codelineno-26-95" href = "#__codelineno-26-95" > < / a > < span class = "w" > < / span > < span class = "nx" > toArray< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-96" name = "__codelineno-26-96" href = "#__codelineno-26-96" > < / a > < span class = "w" > < / span > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-26-97" name = "__codelineno-26-97" href = "#__codelineno-26-97" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-26-98" name = "__codelineno-26-98" href = "#__codelineno-26-98" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-26-99" name = "__codelineno-26-99" href = "#__codelineno-26-99" > < / a > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "err" > #< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > j< / span > < span class = "p" > )];< / span >
< a id = "__codelineno-26-100" name = "__codelineno-26-100" href = "#__codelineno-26-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-26-101" name = "__codelineno-26-101" href = "#__codelineno-26-101" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-26-102" name = "__codelineno-26-102" href = "#__codelineno-26-102" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-04-22 01:35:59 +08:00
< a id = "__codelineno-26-103" name = "__codelineno-26-103" href = "#__codelineno-26-103" > < / a > < span class = "p" > }< / span >
2023-02-16 02:20:55 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > array_deque.ts< / span > < pre > < span > < / span > < code > < a id = "__codelineno-27-1" name = "__codelineno-27-1" href = "#__codelineno-27-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-27-2" name = "__codelineno-27-2" href = "#__codelineno-27-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > ArrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-3" name = "__codelineno-27-3" href = "#__codelineno-27-3" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "nx" > nums< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > [];< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-27-4" name = "__codelineno-27-4" href = "#__codelineno-27-4" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "nx" > front< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-27-5" name = "__codelineno-27-5" href = "#__codelineno-27-5" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "nx" > queSize< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列长度< / span >
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< a id = "__codelineno-27-6" name = "__codelineno-27-6" href = "#__codelineno-27-6" > < / a >
< a id = "__codelineno-27-7" name = "__codelineno-27-7" href = "#__codelineno-27-7" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-27-8" name = "__codelineno-27-8" href = "#__codelineno-27-8" > < / a > < span class = "w" > < / span > < span class = "kr" > constructor< / span > < span class = "p" > (< / span > < span class = "nx" > capacity< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-9" name = "__codelineno-27-9" href = "#__codelineno-27-9" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "nx" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-10" name = "__codelineno-27-10" href = "#__codelineno-27-10" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-11" name = "__codelineno-27-11" href = "#__codelineno-27-11" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-12" name = "__codelineno-27-12" href = "#__codelineno-27-12" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-13" name = "__codelineno-27-13" href = "#__codelineno-27-13" > < / a >
< a id = "__codelineno-27-14" name = "__codelineno-27-14" href = "#__codelineno-27-14" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-27-15" name = "__codelineno-27-15" href = "#__codelineno-27-15" > < / a > < span class = "w" > < / span > < span class = "nx" > capacity< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-16" name = "__codelineno-27-16" href = "#__codelineno-27-16" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-17" name = "__codelineno-27-17" href = "#__codelineno-27-17" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-18" name = "__codelineno-27-18" href = "#__codelineno-27-18" > < / a >
< a id = "__codelineno-27-19" name = "__codelineno-27-19" href = "#__codelineno-27-19" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-27-20" name = "__codelineno-27-20" href = "#__codelineno-27-20" > < / a > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-21" name = "__codelineno-27-21" href = "#__codelineno-27-21" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-22" name = "__codelineno-27-22" href = "#__codelineno-27-22" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-23" name = "__codelineno-27-23" href = "#__codelineno-27-23" > < / a >
< a id = "__codelineno-27-24" name = "__codelineno-27-24" href = "#__codelineno-27-24" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-27-25" name = "__codelineno-27-25" href = "#__codelineno-27-25" > < / a > < span class = "w" > < / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > boolean< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-26" name = "__codelineno-27-26" href = "#__codelineno-27-26" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-27" name = "__codelineno-27-27" href = "#__codelineno-27-27" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-28" name = "__codelineno-27-28" href = "#__codelineno-27-28" > < / a >
< a id = "__codelineno-27-29" name = "__codelineno-27-29" href = "#__codelineno-27-29" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-27-30" name = "__codelineno-27-30" href = "#__codelineno-27-30" > < / a > < span class = "w" > < / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > i< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > )< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-31" name = "__codelineno-27-31" href = "#__codelineno-27-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-27-32" name = "__codelineno-27-32" href = "#__codelineno-27-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-27-33" name = "__codelineno-27-33" href = "#__codelineno-27-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-27-34" name = "__codelineno-27-34" href = "#__codelineno-27-34" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-27-35" name = "__codelineno-27-35" href = "#__codelineno-27-35" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-36" name = "__codelineno-27-36" href = "#__codelineno-27-36" > < / a >
< a id = "__codelineno-27-37" name = "__codelineno-27-37" href = "#__codelineno-27-37" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-27-38" name = "__codelineno-27-38" href = "#__codelineno-27-38" > < / a > < span class = "w" > < / span > < span class = "nx" > pushFirst< / span > < span class = "p" > (< / span > < span class = "nx" > num< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > )< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "ow" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-39" name = "__codelineno-27-39" href = "#__codelineno-27-39" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-40" name = "__codelineno-27-40" href = "#__codelineno-27-40" > < / a > < span class = "w" > < / span > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s1" > ' 双向队列已满' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-41" name = "__codelineno-27-41" href = "#__codelineno-27-41" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-42" name = "__codelineno-27-42" href = "#__codelineno-27-42" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-43" name = "__codelineno-27-43" href = "#__codelineno-27-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-27-44" name = "__codelineno-27-44" href = "#__codelineno-27-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-27-45" name = "__codelineno-27-45" href = "#__codelineno-27-45" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-46" name = "__codelineno-27-46" href = "#__codelineno-27-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-27-47" name = "__codelineno-27-47" href = "#__codelineno-27-47" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-48" name = "__codelineno-27-48" href = "#__codelineno-27-48" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-49" name = "__codelineno-27-49" href = "#__codelineno-27-49" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-50" name = "__codelineno-27-50" href = "#__codelineno-27-50" > < / a >
< a id = "__codelineno-27-51" name = "__codelineno-27-51" href = "#__codelineno-27-51" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-27-52" name = "__codelineno-27-52" href = "#__codelineno-27-52" > < / a > < span class = "w" > < / span > < span class = "nx" > pushLast< / span > < span class = "p" > (< / span > < span class = "nx" > num< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > )< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "ow" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-53" name = "__codelineno-27-53" href = "#__codelineno-27-53" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ===< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-54" name = "__codelineno-27-54" href = "#__codelineno-27-54" > < / a > < span class = "w" > < / span > < span class = "nx" > console< / span > < span class = "p" > .< / span > < span class = "nx" > log< / span > < span class = "p" > (< / span > < span class = "s1" > ' 双向队列已满' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-55" name = "__codelineno-27-55" href = "#__codelineno-27-55" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-56" name = "__codelineno-27-56" href = "#__codelineno-27-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-57" name = "__codelineno-27-57" href = "#__codelineno-27-57" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-27-58" name = "__codelineno-27-58" href = "#__codelineno-27-58" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > rear< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-59" name = "__codelineno-27-59" href = "#__codelineno-27-59" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-27-60" name = "__codelineno-27-60" href = "#__codelineno-27-60" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > rear< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-61" name = "__codelineno-27-61" href = "#__codelineno-27-61" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-62" name = "__codelineno-27-62" href = "#__codelineno-27-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-63" name = "__codelineno-27-63" href = "#__codelineno-27-63" > < / a >
< a id = "__codelineno-27-64" name = "__codelineno-27-64" href = "#__codelineno-27-64" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-27-65" name = "__codelineno-27-65" href = "#__codelineno-27-65" > < / a > < span class = "w" > < / span > < span class = "nx" > popFirst< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-66" name = "__codelineno-27-66" href = "#__codelineno-27-66" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-27-67" name = "__codelineno-27-67" href = "#__codelineno-27-67" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-27-68" name = "__codelineno-27-68" href = "#__codelineno-27-68" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-69" name = "__codelineno-27-69" href = "#__codelineno-27-69" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-70" name = "__codelineno-27-70" href = "#__codelineno-27-70" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-71" name = "__codelineno-27-71" href = "#__codelineno-27-71" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-72" name = "__codelineno-27-72" href = "#__codelineno-27-72" > < / a >
< a id = "__codelineno-27-73" name = "__codelineno-27-73" href = "#__codelineno-27-73" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-27-74" name = "__codelineno-27-74" href = "#__codelineno-27-74" > < / a > < span class = "w" > < / span > < span class = "nx" > popLast< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-75" name = "__codelineno-27-75" href = "#__codelineno-27-75" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > peekLast< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-27-76" name = "__codelineno-27-76" href = "#__codelineno-27-76" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-77" name = "__codelineno-27-77" href = "#__codelineno-27-77" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-78" name = "__codelineno-27-78" href = "#__codelineno-27-78" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-79" name = "__codelineno-27-79" href = "#__codelineno-27-79" > < / a >
< a id = "__codelineno-27-80" name = "__codelineno-27-80" href = "#__codelineno-27-80" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-27-81" name = "__codelineno-27-81" href = "#__codelineno-27-81" > < / a > < span class = "w" > < / span > < span class = "nx" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-82" name = "__codelineno-27-82" href = "#__codelineno-27-82" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "ne" > Error< / span > < span class = "p" > (< / span > < span class = "s1" > ' The Deque Is Empty.' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-83" name = "__codelineno-27-83" href = "#__codelineno-27-83" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-27-84" name = "__codelineno-27-84" href = "#__codelineno-27-84" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-85" name = "__codelineno-27-85" href = "#__codelineno-27-85" > < / a >
< a id = "__codelineno-27-86" name = "__codelineno-27-86" href = "#__codelineno-27-86" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-27-87" name = "__codelineno-27-87" href = "#__codelineno-27-87" > < / a > < span class = "w" > < / span > < span class = "nx" > peekLast< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-88" name = "__codelineno-27-88" href = "#__codelineno-27-88" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "ow" > new< / span > < span class = "w" > < / span > < span class = "ne" > Error< / span > < span class = "p" > (< / span > < span class = "s1" > ' The Deque Is Empty.' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-89" name = "__codelineno-27-89" href = "#__codelineno-27-89" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-27-90" name = "__codelineno-27-90" href = "#__codelineno-27-90" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > last< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-91" name = "__codelineno-27-91" href = "#__codelineno-27-91" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "nx" > last< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-27-92" name = "__codelineno-27-92" href = "#__codelineno-27-92" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-93" name = "__codelineno-27-93" href = "#__codelineno-27-93" > < / a >
< a id = "__codelineno-27-94" name = "__codelineno-27-94" href = "#__codelineno-27-94" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-27-95" name = "__codelineno-27-95" href = "#__codelineno-27-95" > < / a > < span class = "w" > < / span > < span class = "nx" > toArray< / span > < span class = "p" > ()< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-96" name = "__codelineno-27-96" href = "#__codelineno-27-96" > < / a > < span class = "w" > < / span > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-27-97" name = "__codelineno-27-97" href = "#__codelineno-27-97" > < / a > < span class = "w" > < / span > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > number< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-27-98" name = "__codelineno-27-98" href = "#__codelineno-27-98" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-99" name = "__codelineno-27-99" href = "#__codelineno-27-99" > < / a > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > nums< / span > < span class = "p" > [< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > index< / span > < span class = "p" > (< / span > < span class = "nx" > j< / span > < span class = "p" > )];< / span >
< a id = "__codelineno-27-100" name = "__codelineno-27-100" href = "#__codelineno-27-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-101" name = "__codelineno-27-101" href = "#__codelineno-27-101" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-27-102" name = "__codelineno-27-102" href = "#__codelineno-27-102" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-103" name = "__codelineno-27-103" href = "#__codelineno-27-103" > < / a > < span class = "p" > }< / span >
2023-02-16 02:20:55 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > array_deque.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-28-1" name = "__codelineno-28-1" href = "#__codelineno-28-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-28-2" name = "__codelineno-28-2" href = "#__codelineno-28-2" > < / a > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > arrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-3" name = "__codelineno-28-3" href = "#__codelineno-28-3" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > nums< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储队列元素的数组< / span >
< a id = "__codelineno-28-4" name = "__codelineno-28-4" href = "#__codelineno-28-4" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-28-5" name = "__codelineno-28-5" href = "#__codelineno-28-5" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 尾指针，指向队尾 + 1< / span >
< a id = "__codelineno-28-6" name = "__codelineno-28-6" href = "#__codelineno-28-6" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queCapacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队列容量< / span >
< a id = "__codelineno-28-7" name = "__codelineno-28-7" href = "#__codelineno-28-7" > < / a > < span class = "p" > };< / span >
< a id = "__codelineno-28-8" name = "__codelineno-28-8" href = "#__codelineno-28-8" > < / a >
< a id = "__codelineno-28-9" name = "__codelineno-28-9" href = "#__codelineno-28-9" > < / a > < span class = "k" > typedef< / span > < span class = "w" > < / span > < span class = "k" > struct< / span > < span class = "w" > < / span > < span class = "nc" > arrayDeque< / span > < span class = "w" > < / span > < span class = "n" > arrayDeque< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-10" name = "__codelineno-28-10" href = "#__codelineno-28-10" > < / a >
< a id = "__codelineno-28-11" name = "__codelineno-28-11" href = "#__codelineno-28-11" > < / a > < span class = "cm" > /* 构造函数 */< / span >
< a id = "__codelineno-28-12" name = "__codelineno-28-12" href = "#__codelineno-28-12" > < / a > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nf" > newArrayDeque< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-13" name = "__codelineno-28-13" href = "#__codelineno-28-13" > < / a > < span class = "w" > < / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "p" > )< / span > < span class = "n" > malloc< / span > < span class = "p" > (< / span > < span class = "k" > sizeof< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-28-14" name = "__codelineno-28-14" href = "#__codelineno-28-14" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化数组< / span >
< a id = "__codelineno-28-15" name = "__codelineno-28-15" href = "#__codelineno-28-15" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queCapacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-16" name = "__codelineno-28-16" href = "#__codelineno-28-16" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > nums< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "p" > )< / span > < span class = "n" > malloc< / span > < span class = "p" > (< / span > < span class = "k" > sizeof< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queCapacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-17" name = "__codelineno-28-17" href = "#__codelineno-28-17" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-18" name = "__codelineno-28-18" href = "#__codelineno-28-18" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-19" name = "__codelineno-28-19" href = "#__codelineno-28-19" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-20" name = "__codelineno-28-20" href = "#__codelineno-28-20" > < / a >
< a id = "__codelineno-28-21" name = "__codelineno-28-21" href = "#__codelineno-28-21" > < / a > < span class = "cm" > /* 析构函数 */< / span >
< a id = "__codelineno-28-22" name = "__codelineno-28-22" href = "#__codelineno-28-22" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > delArrayDeque< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-23" name = "__codelineno-28-23" href = "#__codelineno-28-23" > < / a > < span class = "w" > < / span > < span class = "n" > free< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > nums< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-24" name = "__codelineno-28-24" href = "#__codelineno-28-24" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queCapacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-25" name = "__codelineno-28-25" href = "#__codelineno-28-25" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-26" name = "__codelineno-28-26" href = "#__codelineno-28-26" > < / a >
< a id = "__codelineno-28-27" name = "__codelineno-28-27" href = "#__codelineno-28-27" > < / a > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-28-28" name = "__codelineno-28-28" href = "#__codelineno-28-28" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > capacity< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-29" name = "__codelineno-28-29" href = "#__codelineno-28-29" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queCapacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-30" name = "__codelineno-28-30" href = "#__codelineno-28-30" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-31" name = "__codelineno-28-31" href = "#__codelineno-28-31" > < / a >
< a id = "__codelineno-28-32" name = "__codelineno-28-32" href = "#__codelineno-28-32" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-28-33" name = "__codelineno-28-33" href = "#__codelineno-28-33" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > size< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-34" name = "__codelineno-28-34" href = "#__codelineno-28-34" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-35" name = "__codelineno-28-35" href = "#__codelineno-28-35" > < / a > < span class = "p" > }< / span >
2023-02-24 03:36:50 +08:00
< a id = "__codelineno-28-36" name = "__codelineno-28-36" href = "#__codelineno-28-36" > < / a >
2023-06-02 02:38:32 +08:00
< a id = "__codelineno-28-37" name = "__codelineno-28-37" href = "#__codelineno-28-37" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-28-38" name = "__codelineno-28-38" href = "#__codelineno-28-38" > < / a > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "nf" > empty< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-39" name = "__codelineno-28-39" href = "#__codelineno-28-39" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-40" name = "__codelineno-28-40" href = "#__codelineno-28-40" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-41" name = "__codelineno-28-41" href = "#__codelineno-28-41" > < / a >
2023-06-06 01:56:03 +08:00
< a id = "__codelineno-28-42" name = "__codelineno-28-42" href = "#__codelineno-28-42" > < / a > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-28-43" name = "__codelineno-28-43" href = "#__codelineno-28-43" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > dequeIndex< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-44" name = "__codelineno-28-44" href = "#__codelineno-28-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-28-45" name = "__codelineno-28-45" href = "#__codelineno-28-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部时，回到头部< / span >
< a id = "__codelineno-28-46" name = "__codelineno-28-46" href = "#__codelineno-28-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-28-47" name = "__codelineno-28-47" href = "#__codelineno-28-47" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > ((< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ))< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-28-48" name = "__codelineno-28-48" href = "#__codelineno-28-48" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-49" name = "__codelineno-28-49" href = "#__codelineno-28-49" > < / a >
< a id = "__codelineno-28-50" name = "__codelineno-28-50" href = "#__codelineno-28-50" > < / a > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-28-51" name = "__codelineno-28-51" href = "#__codelineno-28-51" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-52" name = "__codelineno-28-52" href = "#__codelineno-28-52" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ))< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-53" name = "__codelineno-28-53" href = "#__codelineno-28-53" > < / a > < span class = "w" > < / span > < span class = "n" > printf< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满< / span > < span class = "se" > \r\n< / span > < span class = "s" > " < / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-54" name = "__codelineno-28-54" href = "#__codelineno-28-54" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-55" name = "__codelineno-28-55" href = "#__codelineno-28-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-28-56" name = "__codelineno-28-56" href = "#__codelineno-28-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-28-57" name = "__codelineno-28-57" href = "#__codelineno-28-57" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部回到尾部< / span >
< a id = "__codelineno-28-58" name = "__codelineno-28-58" href = "#__codelineno-28-58" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > dequeIndex< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-59" name = "__codelineno-28-59" href = "#__codelineno-28-59" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加到队首< / span >
< a id = "__codelineno-28-60" name = "__codelineno-28-60" href = "#__codelineno-28-60" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-61" name = "__codelineno-28-61" href = "#__codelineno-28-61" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-62" name = "__codelineno-28-62" href = "#__codelineno-28-62" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-63" name = "__codelineno-28-63" href = "#__codelineno-28-63" > < / a >
< a id = "__codelineno-28-64" name = "__codelineno-28-64" href = "#__codelineno-28-64" > < / a > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-28-65" name = "__codelineno-28-65" href = "#__codelineno-28-65" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-66" name = "__codelineno-28-66" href = "#__codelineno-28-66" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ))< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-67" name = "__codelineno-28-67" href = "#__codelineno-28-67" > < / a > < span class = "w" > < / span > < span class = "n" > printf< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满< / span > < span class = "se" > \r\n< / span > < span class = "s" > " < / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-68" name = "__codelineno-28-68" href = "#__codelineno-28-68" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-69" name = "__codelineno-28-69" href = "#__codelineno-28-69" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-28-70" name = "__codelineno-28-70" href = "#__codelineno-28-70" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-28-71" name = "__codelineno-28-71" href = "#__codelineno-28-71" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > dequeIndex< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-72" name = "__codelineno-28-72" href = "#__codelineno-28-72" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-28-73" name = "__codelineno-28-73" href = "#__codelineno-28-73" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > rear< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-74" name = "__codelineno-28-74" href = "#__codelineno-28-74" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-75" name = "__codelineno-28-75" href = "#__codelineno-28-75" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-76" name = "__codelineno-28-76" href = "#__codelineno-28-76" > < / a >
< a id = "__codelineno-28-77" name = "__codelineno-28-77" href = "#__codelineno-28-77" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-28-78" name = "__codelineno-28-78" href = "#__codelineno-28-78" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekFirst< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-79" name = "__codelineno-28-79" href = "#__codelineno-28-79" > < / a > < span class = "w" > < / span > < span class = "c1" > // 访问异常：双向队列为空< / span >
< a id = "__codelineno-28-80" name = "__codelineno-28-80" href = "#__codelineno-28-80" > < / a > < span class = "w" > < / span > < span class = "n" > assert< / span > < span class = "p" > (< / span > < span class = "n" > empty< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-81" name = "__codelineno-28-81" href = "#__codelineno-28-81" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-28-82" name = "__codelineno-28-82" href = "#__codelineno-28-82" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-83" name = "__codelineno-28-83" href = "#__codelineno-28-83" > < / a >
< a id = "__codelineno-28-84" name = "__codelineno-28-84" href = "#__codelineno-28-84" > < / a > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-28-85" name = "__codelineno-28-85" href = "#__codelineno-28-85" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekLast< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-86" name = "__codelineno-28-86" href = "#__codelineno-28-86" > < / a > < span class = "w" > < / span > < span class = "c1" > // 访问异常：双向队列为空< / span >
< a id = "__codelineno-28-87" name = "__codelineno-28-87" href = "#__codelineno-28-87" > < / a > < span class = "w" > < / span > < span class = "n" > assert< / span > < span class = "p" > (< / span > < span class = "n" > empty< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-88" name = "__codelineno-28-88" href = "#__codelineno-28-88" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > last< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > dequeIndex< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-89" name = "__codelineno-28-89" href = "#__codelineno-28-89" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > last< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-28-90" name = "__codelineno-28-90" href = "#__codelineno-28-90" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-91" name = "__codelineno-28-91" href = "#__codelineno-28-91" > < / a >
< a id = "__codelineno-28-92" name = "__codelineno-28-92" href = "#__codelineno-28-92" > < / a > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-28-93" name = "__codelineno-28-93" href = "#__codelineno-28-93" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popFirst< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-94" name = "__codelineno-28-94" href = "#__codelineno-28-94" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-95" name = "__codelineno-28-95" href = "#__codelineno-28-95" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-28-96" name = "__codelineno-28-96" href = "#__codelineno-28-96" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > dequeIndex< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-97" name = "__codelineno-28-97" href = "#__codelineno-28-97" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-98" name = "__codelineno-28-98" href = "#__codelineno-28-98" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-99" name = "__codelineno-28-99" href = "#__codelineno-28-99" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-100" name = "__codelineno-28-100" href = "#__codelineno-28-100" > < / a >
< a id = "__codelineno-28-101" name = "__codelineno-28-101" href = "#__codelineno-28-101" > < / a > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-28-102" name = "__codelineno-28-102" href = "#__codelineno-28-102" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popLast< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-103" name = "__codelineno-28-103" href = "#__codelineno-28-103" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > (< / span > < span class = "n" > deque< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-104" name = "__codelineno-28-104" href = "#__codelineno-28-104" > < / a > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-105" name = "__codelineno-28-105" href = "#__codelineno-28-105" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-28-106" name = "__codelineno-28-106" href = "#__codelineno-28-106" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-107" name = "__codelineno-28-107" href = "#__codelineno-28-107" > < / a >
< a id = "__codelineno-28-108" name = "__codelineno-28-108" href = "#__codelineno-28-108" > < / a > < span class = "cm" > /* 打印队列 */< / span >
< a id = "__codelineno-28-109" name = "__codelineno-28-109" href = "#__codelineno-28-109" > < / a > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > printArrayDeque< / span > < span class = "p" > (< / span > < span class = "n" > arrayDeque< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > deque< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-110" name = "__codelineno-28-110" href = "#__codelineno-28-110" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > arr< / span > < span class = "p" > [< / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-28-111" name = "__codelineno-28-111" href = "#__codelineno-28-111" > < / a > < span class = "w" > < / span > < span class = "c1" > // 拷贝< / span >
< a id = "__codelineno-28-112" name = "__codelineno-28-112" href = "#__codelineno-28-112" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-113" name = "__codelineno-28-113" href = "#__codelineno-28-113" > < / a > < span class = "w" > < / span > < span class = "n" > arr< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queCapacity< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-28-114" name = "__codelineno-28-114" href = "#__codelineno-28-114" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-28-115" name = "__codelineno-28-115" href = "#__codelineno-28-115" > < / a > < span class = "w" > < / span > < span class = "n" > printArray< / span > < span class = "p" > (< / span > < span class = "n" > arr< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > deque< / span > < span class = "o" > -> < / span > < span class = "n" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-28-116" name = "__codelineno-28-116" href = "#__codelineno-28-116" > < / a > < span class = "p" > }< / span >
2023-06-02 02:38:32 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_deque.cs< / span > < pre > < span > < / span > < code > < a id = "__codelineno-29-1" name = "__codelineno-29-1" href = "#__codelineno-29-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-29-2" name = "__codelineno-29-2" href = "#__codelineno-29-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > ArrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-3" name = "__codelineno-29-3" href = "#__codelineno-29-3" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "k" > readonly< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-29-4" name = "__codelineno-29-4" href = "#__codelineno-29-4" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-29-5" name = "__codelineno-29-5" href = "#__codelineno-29-5" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列长度< / span >
< a id = "__codelineno-29-6" name = "__codelineno-29-6" href = "#__codelineno-29-6" > < / a >
< a id = "__codelineno-29-7" name = "__codelineno-29-7" href = "#__codelineno-29-7" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-29-8" name = "__codelineno-29-8" href = "#__codelineno-29-8" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "nf" > ArrayDeque< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-9" name = "__codelineno-29-9" href = "#__codelineno-29-9" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > nums< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > [< / span > < span class = "n" > capacity< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-29-10" name = "__codelineno-29-10" href = "#__codelineno-29-10" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-11" name = "__codelineno-29-11" href = "#__codelineno-29-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-12" name = "__codelineno-29-12" href = "#__codelineno-29-12" > < / a >
< a id = "__codelineno-29-13" name = "__codelineno-29-13" href = "#__codelineno-29-13" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-29-14" name = "__codelineno-29-14" href = "#__codelineno-29-14" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > capacity< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-15" name = "__codelineno-29-15" href = "#__codelineno-29-15" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > .< / span > < span class = "n" > Length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-16" name = "__codelineno-29-16" href = "#__codelineno-29-16" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-17" name = "__codelineno-29-17" href = "#__codelineno-29-17" > < / a >
< a id = "__codelineno-29-18" name = "__codelineno-29-18" href = "#__codelineno-29-18" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-29-19" name = "__codelineno-29-19" href = "#__codelineno-29-19" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-20" name = "__codelineno-29-20" href = "#__codelineno-29-20" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-21" name = "__codelineno-29-21" href = "#__codelineno-29-21" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-22" name = "__codelineno-29-22" href = "#__codelineno-29-22" > < / a >
< a id = "__codelineno-29-23" name = "__codelineno-29-23" href = "#__codelineno-29-23" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-29-24" name = "__codelineno-29-24" href = "#__codelineno-29-24" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-25" name = "__codelineno-29-25" href = "#__codelineno-29-25" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-26" name = "__codelineno-29-26" href = "#__codelineno-29-26" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-27" name = "__codelineno-29-27" href = "#__codelineno-29-27" > < / a >
< a id = "__codelineno-29-28" name = "__codelineno-29-28" href = "#__codelineno-29-28" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-29-29" name = "__codelineno-29-29" href = "#__codelineno-29-29" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > index< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-30" name = "__codelineno-29-30" href = "#__codelineno-29-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-29-31" name = "__codelineno-29-31" href = "#__codelineno-29-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-29-32" name = "__codelineno-29-32" href = "#__codelineno-29-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-29-33" name = "__codelineno-29-33" href = "#__codelineno-29-33" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-29-34" name = "__codelineno-29-34" href = "#__codelineno-29-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-35" name = "__codelineno-29-35" href = "#__codelineno-29-35" > < / a >
< a id = "__codelineno-29-36" name = "__codelineno-29-36" href = "#__codelineno-29-36" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-29-37" name = "__codelineno-29-37" href = "#__codelineno-29-37" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "k" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-38" name = "__codelineno-29-38" href = "#__codelineno-29-38" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-39" name = "__codelineno-29-39" href = "#__codelineno-29-39" > < / a > < span class = "w" > < / span > < span class = "n" > Console< / span > < span class = "p" > .< / span > < span class = "n" > WriteLine< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-29-40" name = "__codelineno-29-40" href = "#__codelineno-29-40" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-41" name = "__codelineno-29-41" href = "#__codelineno-29-41" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-42" name = "__codelineno-29-42" href = "#__codelineno-29-42" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-29-43" name = "__codelineno-29-43" href = "#__codelineno-29-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-29-44" name = "__codelineno-29-44" href = "#__codelineno-29-44" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-29-45" name = "__codelineno-29-45" href = "#__codelineno-29-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-29-46" name = "__codelineno-29-46" href = "#__codelineno-29-46" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > front< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-47" name = "__codelineno-29-47" href = "#__codelineno-29-47" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-48" name = "__codelineno-29-48" href = "#__codelineno-29-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-49" name = "__codelineno-29-49" href = "#__codelineno-29-49" > < / a >
< a id = "__codelineno-29-50" name = "__codelineno-29-50" href = "#__codelineno-29-50" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-29-51" name = "__codelineno-29-51" href = "#__codelineno-29-51" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "k" > void< / span > < span class = "w" > < / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-52" name = "__codelineno-29-52" href = "#__codelineno-29-52" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-53" name = "__codelineno-29-53" href = "#__codelineno-29-53" > < / a > < span class = "w" > < / span > < span class = "n" > Console< / span > < span class = "p" > .< / span > < span class = "n" > WriteLine< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-29-54" name = "__codelineno-29-54" href = "#__codelineno-29-54" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-55" name = "__codelineno-29-55" href = "#__codelineno-29-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-56" name = "__codelineno-29-56" href = "#__codelineno-29-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-29-57" name = "__codelineno-29-57" href = "#__codelineno-29-57" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-29-58" name = "__codelineno-29-58" href = "#__codelineno-29-58" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-29-59" name = "__codelineno-29-59" href = "#__codelineno-29-59" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > rear< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-60" name = "__codelineno-29-60" href = "#__codelineno-29-60" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-61" name = "__codelineno-29-61" href = "#__codelineno-29-61" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-62" name = "__codelineno-29-62" href = "#__codelineno-29-62" > < / a >
< a id = "__codelineno-29-63" name = "__codelineno-29-63" href = "#__codelineno-29-63" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-29-64" name = "__codelineno-29-64" href = "#__codelineno-29-64" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-65" name = "__codelineno-29-65" href = "#__codelineno-29-65" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-29-66" name = "__codelineno-29-66" href = "#__codelineno-29-66" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-29-67" name = "__codelineno-29-67" href = "#__codelineno-29-67" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-29-68" name = "__codelineno-29-68" href = "#__codelineno-29-68" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-69" name = "__codelineno-29-69" href = "#__codelineno-29-69" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-70" name = "__codelineno-29-70" href = "#__codelineno-29-70" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-71" name = "__codelineno-29-71" href = "#__codelineno-29-71" > < / a >
< a id = "__codelineno-29-72" name = "__codelineno-29-72" href = "#__codelineno-29-72" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-29-73" name = "__codelineno-29-73" href = "#__codelineno-29-73" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-74" name = "__codelineno-29-74" href = "#__codelineno-29-74" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-29-75" name = "__codelineno-29-75" href = "#__codelineno-29-75" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-76" name = "__codelineno-29-76" href = "#__codelineno-29-76" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-77" name = "__codelineno-29-77" href = "#__codelineno-29-77" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-78" name = "__codelineno-29-78" href = "#__codelineno-29-78" > < / a >
< a id = "__codelineno-29-79" name = "__codelineno-29-79" href = "#__codelineno-29-79" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-29-80" name = "__codelineno-29-80" href = "#__codelineno-29-80" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-81" name = "__codelineno-29-81" href = "#__codelineno-29-81" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-82" name = "__codelineno-29-82" href = "#__codelineno-29-82" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "nf" > InvalidOperationException< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-29-83" name = "__codelineno-29-83" href = "#__codelineno-29-83" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-84" name = "__codelineno-29-84" href = "#__codelineno-29-84" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > front< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-29-85" name = "__codelineno-29-85" href = "#__codelineno-29-85" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-86" name = "__codelineno-29-86" href = "#__codelineno-29-86" > < / a >
< a id = "__codelineno-29-87" name = "__codelineno-29-87" href = "#__codelineno-29-87" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-29-88" name = "__codelineno-29-88" href = "#__codelineno-29-88" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-89" name = "__codelineno-29-89" href = "#__codelineno-29-89" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-90" name = "__codelineno-29-90" href = "#__codelineno-29-90" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "nf" > InvalidOperationException< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-29-91" name = "__codelineno-29-91" href = "#__codelineno-29-91" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-92" name = "__codelineno-29-92" href = "#__codelineno-29-92" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-29-93" name = "__codelineno-29-93" href = "#__codelineno-29-93" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > last< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-29-94" name = "__codelineno-29-94" href = "#__codelineno-29-94" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > last< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-29-95" name = "__codelineno-29-95" href = "#__codelineno-29-95" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-96" name = "__codelineno-29-96" href = "#__codelineno-29-96" > < / a >
< a id = "__codelineno-29-97" name = "__codelineno-29-97" href = "#__codelineno-29-97" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-29-98" name = "__codelineno-29-98" href = "#__codelineno-29-98" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "nf" > toArray< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-99" name = "__codelineno-29-99" href = "#__codelineno-29-99" > < / a > < span class = "w" > < / span > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-29-100" name = "__codelineno-29-100" href = "#__codelineno-29-100" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > [< / span > < span class = "n" > queSize< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-29-101" name = "__codelineno-29-101" href = "#__codelineno-29-101" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-29-102" name = "__codelineno-29-102" href = "#__codelineno-29-102" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > j< / span > < span class = "p" > )];< / span >
< a id = "__codelineno-29-103" name = "__codelineno-29-103" href = "#__codelineno-29-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-104" name = "__codelineno-29-104" href = "#__codelineno-29-104" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-105" name = "__codelineno-29-105" href = "#__codelineno-29-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-106" name = "__codelineno-29-106" href = "#__codelineno-29-106" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_deque.swift< / span > < pre > < span > < / span > < code > < a id = "__codelineno-30-1" name = "__codelineno-30-1" href = "#__codelineno-30-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-30-2" name = "__codelineno-30-2" href = "#__codelineno-30-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > ArrayDeque< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-3" name = "__codelineno-30-3" href = "#__codelineno-30-3" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > nums< / span > < span class = "p" > :< / span > < span class = "p" > [< / span > < span class = "nb" > Int< / span > < span class = "p" > ]< / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-30-4" name = "__codelineno-30-4" href = "#__codelineno-30-4" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > front< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-30-5" name = "__codelineno-30-5" href = "#__codelineno-30-5" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > queSize< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 双向队列长度< / span >
< a id = "__codelineno-30-6" name = "__codelineno-30-6" href = "#__codelineno-30-6" > < / a >
< a id = "__codelineno-30-7" name = "__codelineno-30-7" href = "#__codelineno-30-7" > < / a > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-30-8" name = "__codelineno-30-8" href = "#__codelineno-30-8" > < / a > < span class = "kd" > init< / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-9" name = "__codelineno-30-9" href = "#__codelineno-30-9" > < / a > < span class = "n" > nums< / span > < span class = "p" > =< / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "n" > repeating< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "bp" > count< / span > < span class = "p" > :< / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-10" name = "__codelineno-30-10" href = "#__codelineno-30-10" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-30-11" name = "__codelineno-30-11" href = "#__codelineno-30-11" > < / a > < span class = "n" > queSize< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-30-12" name = "__codelineno-30-12" href = "#__codelineno-30-12" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-13" name = "__codelineno-30-13" href = "#__codelineno-30-13" > < / a >
< a id = "__codelineno-30-14" name = "__codelineno-30-14" href = "#__codelineno-30-14" > < / a > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-30-15" name = "__codelineno-30-15" href = "#__codelineno-30-15" > < / a > < span class = "kd" > func< / span > < span class = "nf" > capacity< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-16" name = "__codelineno-30-16" href = "#__codelineno-30-16" > < / a > < span class = "n" > nums< / span > < span class = "p" > .< / span > < span class = "bp" > count< / span >
< a id = "__codelineno-30-17" name = "__codelineno-30-17" href = "#__codelineno-30-17" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-18" name = "__codelineno-30-18" href = "#__codelineno-30-18" > < / a >
< a id = "__codelineno-30-19" name = "__codelineno-30-19" href = "#__codelineno-30-19" > < / a > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-30-20" name = "__codelineno-30-20" href = "#__codelineno-30-20" > < / a > < span class = "kd" > func< / span > < span class = "nf" > size< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-21" name = "__codelineno-30-21" href = "#__codelineno-30-21" > < / a > < span class = "n" > queSize< / span >
< a id = "__codelineno-30-22" name = "__codelineno-30-22" href = "#__codelineno-30-22" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-23" name = "__codelineno-30-23" href = "#__codelineno-30-23" > < / a >
< a id = "__codelineno-30-24" name = "__codelineno-30-24" href = "#__codelineno-30-24" > < / a > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-30-25" name = "__codelineno-30-25" href = "#__codelineno-30-25" > < / a > < span class = "kd" > func< / span > < span class = "nf" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Bool< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-26" name = "__codelineno-30-26" href = "#__codelineno-30-26" > < / a > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "p" > ==< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-30-27" name = "__codelineno-30-27" href = "#__codelineno-30-27" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-28" name = "__codelineno-30-28" href = "#__codelineno-30-28" > < / a >
< a id = "__codelineno-30-29" name = "__codelineno-30-29" href = "#__codelineno-30-29" > < / a > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-30-30" name = "__codelineno-30-30" href = "#__codelineno-30-30" > < / a > < span class = "kd" > private< / span > < span class = "kd" > func< / span > < span class = "nf" > index< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-31" name = "__codelineno-30-31" href = "#__codelineno-30-31" > < / a > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-30-32" name = "__codelineno-30-32" href = "#__codelineno-30-32" > < / a > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-30-33" name = "__codelineno-30-33" href = "#__codelineno-30-33" > < / a > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-30-34" name = "__codelineno-30-34" href = "#__codelineno-30-34" > < / a > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "o" > +< / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-30-35" name = "__codelineno-30-35" href = "#__codelineno-30-35" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-36" name = "__codelineno-30-36" href = "#__codelineno-30-36" > < / a >
< a id = "__codelineno-30-37" name = "__codelineno-30-37" href = "#__codelineno-30-37" > < / a > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-30-38" name = "__codelineno-30-38" href = "#__codelineno-30-38" > < / a > < span class = "kd" > func< / span > < span class = "nf" > pushFirst< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-39" name = "__codelineno-30-39" href = "#__codelineno-30-39" > < / a > < span class = "k" > if< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "p" > ==< / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-40" name = "__codelineno-30-40" href = "#__codelineno-30-40" > < / a > < span class = "bp" > print< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-41" name = "__codelineno-30-41" href = "#__codelineno-30-41" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-30-42" name = "__codelineno-30-42" href = "#__codelineno-30-42" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-43" name = "__codelineno-30-43" href = "#__codelineno-30-43" > < / a > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-30-44" name = "__codelineno-30-44" href = "#__codelineno-30-44" > < / a > < span class = "c1" > // 通过取余操作，实现 front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-30-45" name = "__codelineno-30-45" href = "#__codelineno-30-45" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > :< / span > < span class = "n" > front< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-46" name = "__codelineno-30-46" href = "#__codelineno-30-46" > < / a > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-30-47" name = "__codelineno-30-47" href = "#__codelineno-30-47" > < / a > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > front< / span > < span class = "p" > ]< / span > < span class = "p" > =< / span > < span class = "n" > num< / span >
< a id = "__codelineno-30-48" name = "__codelineno-30-48" href = "#__codelineno-30-48" > < / a > < span class = "n" > queSize< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-30-49" name = "__codelineno-30-49" href = "#__codelineno-30-49" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-50" name = "__codelineno-30-50" href = "#__codelineno-30-50" > < / a >
< a id = "__codelineno-30-51" name = "__codelineno-30-51" href = "#__codelineno-30-51" > < / a > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-30-52" name = "__codelineno-30-52" href = "#__codelineno-30-52" > < / a > < span class = "kd" > func< / span > < span class = "nf" > pushLast< / span > < span class = "p" > (< / span > < span class = "n" > num< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-53" name = "__codelineno-30-53" href = "#__codelineno-30-53" > < / a > < span class = "k" > if< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "p" > ==< / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-54" name = "__codelineno-30-54" href = "#__codelineno-30-54" > < / a > < span class = "bp" > print< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列已满" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-55" name = "__codelineno-30-55" href = "#__codelineno-30-55" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-30-56" name = "__codelineno-30-56" href = "#__codelineno-30-56" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-57" name = "__codelineno-30-57" href = "#__codelineno-30-57" > < / a > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-30-58" name = "__codelineno-30-58" href = "#__codelineno-30-58" > < / a > < span class = "kd" > let< / span > < span class = "nv" > rear< / span > < span class = "p" > =< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > :< / span > < span class = "n" > front< / span > < span class = "o" > +< / span > < span class = "n" > size< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-30-59" name = "__codelineno-30-59" href = "#__codelineno-30-59" > < / a > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-30-60" name = "__codelineno-30-60" href = "#__codelineno-30-60" > < / a > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > rear< / span > < span class = "p" > ]< / span > < span class = "p" > =< / span > < span class = "n" > num< / span >
< a id = "__codelineno-30-61" name = "__codelineno-30-61" href = "#__codelineno-30-61" > < / a > < span class = "n" > queSize< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-30-62" name = "__codelineno-30-62" href = "#__codelineno-30-62" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-63" name = "__codelineno-30-63" href = "#__codelineno-30-63" > < / a >
< a id = "__codelineno-30-64" name = "__codelineno-30-64" href = "#__codelineno-30-64" > < / a > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-30-65" name = "__codelineno-30-65" href = "#__codelineno-30-65" > < / a > < span class = "kd" > func< / span > < span class = "nf" > popFirst< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-66" name = "__codelineno-30-66" href = "#__codelineno-30-66" > < / a > < span class = "kd" > let< / span > < span class = "nv" > num< / span > < span class = "p" > =< / span > < span class = "n" > peekFirst< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-30-67" name = "__codelineno-30-67" href = "#__codelineno-30-67" > < / a > < span class = "c1" > // 队首指针向后移动一位< / span >
< a id = "__codelineno-30-68" name = "__codelineno-30-68" href = "#__codelineno-30-68" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > :< / span > < span class = "n" > front< / span > < span class = "o" > +< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-69" name = "__codelineno-30-69" href = "#__codelineno-30-69" > < / a > < span class = "n" > queSize< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-30-70" name = "__codelineno-30-70" href = "#__codelineno-30-70" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-30-71" name = "__codelineno-30-71" href = "#__codelineno-30-71" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-72" name = "__codelineno-30-72" href = "#__codelineno-30-72" > < / a >
< a id = "__codelineno-30-73" name = "__codelineno-30-73" href = "#__codelineno-30-73" > < / a > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-30-74" name = "__codelineno-30-74" href = "#__codelineno-30-74" > < / a > < span class = "kd" > func< / span > < span class = "nf" > popLast< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-75" name = "__codelineno-30-75" href = "#__codelineno-30-75" > < / a > < span class = "kd" > let< / span > < span class = "nv" > num< / span > < span class = "p" > =< / span > < span class = "n" > peekLast< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-30-76" name = "__codelineno-30-76" href = "#__codelineno-30-76" > < / a > < span class = "n" > queSize< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-30-77" name = "__codelineno-30-77" href = "#__codelineno-30-77" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-30-78" name = "__codelineno-30-78" href = "#__codelineno-30-78" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-79" name = "__codelineno-30-79" href = "#__codelineno-30-79" > < / a >
< a id = "__codelineno-30-80" name = "__codelineno-30-80" href = "#__codelineno-30-80" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-30-81" name = "__codelineno-30-81" href = "#__codelineno-30-81" > < / a > < span class = "kd" > func< / span > < span class = "nf" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-82" name = "__codelineno-30-82" href = "#__codelineno-30-82" > < / a > < span class = "k" > if< / span > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-83" name = "__codelineno-30-83" href = "#__codelineno-30-83" > < / a > < span class = "bp" > fatalError< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-84" name = "__codelineno-30-84" href = "#__codelineno-30-84" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-85" name = "__codelineno-30-85" href = "#__codelineno-30-85" > < / a > < span class = "k" > return< / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > front< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-30-86" name = "__codelineno-30-86" href = "#__codelineno-30-86" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-87" name = "__codelineno-30-87" href = "#__codelineno-30-87" > < / a >
< a id = "__codelineno-30-88" name = "__codelineno-30-88" href = "#__codelineno-30-88" > < / a > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-30-89" name = "__codelineno-30-89" href = "#__codelineno-30-89" > < / a > < span class = "kd" > func< / span > < span class = "nf" > peekLast< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-90" name = "__codelineno-30-90" href = "#__codelineno-30-90" > < / a > < span class = "k" > if< / span > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-91" name = "__codelineno-30-91" href = "#__codelineno-30-91" > < / a > < span class = "bp" > fatalError< / span > < span class = "p" > (< / span > < span class = "s" > " 双向队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-92" name = "__codelineno-30-92" href = "#__codelineno-30-92" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-93" name = "__codelineno-30-93" href = "#__codelineno-30-93" > < / a > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-30-94" name = "__codelineno-30-94" href = "#__codelineno-30-94" > < / a > < span class = "kd" > let< / span > < span class = "nv" > last< / span > < span class = "p" > =< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > :< / span > < span class = "n" > front< / span > < span class = "o" > +< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-30-95" name = "__codelineno-30-95" href = "#__codelineno-30-95" > < / a > < span class = "k" > return< / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "bp" > last< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-30-96" name = "__codelineno-30-96" href = "#__codelineno-30-96" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-97" name = "__codelineno-30-97" href = "#__codelineno-30-97" > < / a >
< a id = "__codelineno-30-98" name = "__codelineno-30-98" href = "#__codelineno-30-98" > < / a > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-30-99" name = "__codelineno-30-99" href = "#__codelineno-30-99" > < / a > < span class = "kd" > func< / span > < span class = "nf" > toArray< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "p" > [< / span > < span class = "nb" > Int< / span > < span class = "p" > ]< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-100" name = "__codelineno-30-100" href = "#__codelineno-30-100" > < / a > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-30-101" name = "__codelineno-30-101" href = "#__codelineno-30-101" > < / a > < span class = "kd" > var< / span > < span class = "nv" > res< / span > < span class = "p" > =< / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "n" > repeating< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "bp" > count< / span > < span class = "p" > :< / span > < span class = "n" > size< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-30-102" name = "__codelineno-30-102" href = "#__codelineno-30-102" > < / a > < span class = "k" > for< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > ,< / span > < span class = "n" > j< / span > < span class = "p" > )< / span > < span class = "k" > in< / span > < span class = "n" > sequence< / span > < span class = "p" > (< / span > < span class = "bp" > first< / span > < span class = "p" > :< / span > < span class = "p" > (< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "n" > front< / span > < span class = "p" > ),< / span > < span class = "n" > next< / span > < span class = "p" > :< / span > < span class = "p" > {< / span > < span class = "nv" > $0< / span > < span class = "o" > < < / span > < span class = "kc" > self< / span > < span class = "p" > .< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > ?< / span > < span class = "p" > (< / span > < span class = "nv" > $0< / span > < span class = "o" > +< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span > < span class = "nv" > $1< / span > < span class = "o" > +< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span > < span class = "p" > :< / span > < span class = "kc" > nil< / span > < span class = "p" > })< / span > < span class = "p" > {< / span >
< a id = "__codelineno-30-103" name = "__codelineno-30-103" href = "#__codelineno-30-103" > < / a > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "p" > =< / span > < span class = "n" > nums< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > :< / span > < span class = "n" > j< / span > < span class = "p" > )]< / span >
< a id = "__codelineno-30-104" name = "__codelineno-30-104" href = "#__codelineno-30-104" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-105" name = "__codelineno-30-105" href = "#__codelineno-30-105" > < / a > < span class = "k" > return< / span > < span class = "n" > res< / span >
< a id = "__codelineno-30-106" name = "__codelineno-30-106" href = "#__codelineno-30-106" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-30-107" name = "__codelineno-30-107" href = "#__codelineno-30-107" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_deque.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-31-1" name = "__codelineno-31-1" href = "#__codelineno-31-1" > < / a > < span class = "p" > [< / span > < span class = "n" > class< / span > < span class = "p" > ]{< / span > < span class = "n" > ArrayDeque< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "n" > func< / span > < span class = "p" > ]{}< / span >
2023-02-16 02:20:55 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-02 02:38:32 +08:00
< div class = "highlight" > < span class = "filename" > array_deque.dart< / span > < pre > < span > < / span > < code > < a id = "__codelineno-32-1" name = "__codelineno-32-1" href = "#__codelineno-32-1" > < / a > < span class = "cm" > /* 基于环形数组实现的双向队列 */< / span >
< a id = "__codelineno-32-2" name = "__codelineno-32-2" href = "#__codelineno-32-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nc" > ArrayDeque< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-3" name = "__codelineno-32-3" href = "#__codelineno-32-3" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > _nums< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储双向队列元素的数组< / span >
< a id = "__codelineno-32-4" name = "__codelineno-32-4" href = "#__codelineno-32-4" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-32-5" name = "__codelineno-32-5" href = "#__codelineno-32-5" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 双向队列长度< / span >
< a id = "__codelineno-32-6" name = "__codelineno-32-6" href = "#__codelineno-32-6" > < / a >
< a id = "__codelineno-32-7" name = "__codelineno-32-7" href = "#__codelineno-32-7" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-32-8" name = "__codelineno-32-8" href = "#__codelineno-32-8" > < / a > < span class = "w" > < / span > < span class = "n" > ArrayDeque< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-9" name = "__codelineno-32-9" href = "#__codelineno-32-9" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > _nums< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "p" > .< / span > < span class = "n" > filled< / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-10" name = "__codelineno-32-10" href = "#__codelineno-32-10" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "n" > _queSize< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-11" name = "__codelineno-32-11" href = "#__codelineno-32-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-12" name = "__codelineno-32-12" href = "#__codelineno-32-12" > < / a >
< a id = "__codelineno-32-13" name = "__codelineno-32-13" href = "#__codelineno-32-13" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的容量 */< / span >
< a id = "__codelineno-32-14" name = "__codelineno-32-14" href = "#__codelineno-32-14" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-15" name = "__codelineno-32-15" href = "#__codelineno-32-15" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _nums< / span > < span class = "p" > .< / span > < span class = "n" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-16" name = "__codelineno-32-16" href = "#__codelineno-32-16" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-17" name = "__codelineno-32-17" href = "#__codelineno-32-17" > < / a >
< a id = "__codelineno-32-18" name = "__codelineno-32-18" href = "#__codelineno-32-18" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取双向队列的长度 */< / span >
< a id = "__codelineno-32-19" name = "__codelineno-32-19" href = "#__codelineno-32-19" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-20" name = "__codelineno-32-20" href = "#__codelineno-32-20" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-21" name = "__codelineno-32-21" href = "#__codelineno-32-21" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-22" name = "__codelineno-32-22" href = "#__codelineno-32-22" > < / a >
< a id = "__codelineno-32-23" name = "__codelineno-32-23" href = "#__codelineno-32-23" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断双向队列是否为空 */< / span >
< a id = "__codelineno-32-24" name = "__codelineno-32-24" href = "#__codelineno-32-24" > < / a > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-25" name = "__codelineno-32-25" href = "#__codelineno-32-25" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-26" name = "__codelineno-32-26" href = "#__codelineno-32-26" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-27" name = "__codelineno-32-27" href = "#__codelineno-32-27" > < / a >
< a id = "__codelineno-32-28" name = "__codelineno-32-28" href = "#__codelineno-32-28" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 计算环形数组索引 */< / span >
< a id = "__codelineno-32-29" name = "__codelineno-32-29" href = "#__codelineno-32-29" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-30" name = "__codelineno-32-30" href = "#__codelineno-32-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作实现数组首尾相连< / span >
< a id = "__codelineno-32-31" name = "__codelineno-32-31" href = "#__codelineno-32-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组尾部后，回到头部< / span >
< a id = "__codelineno-32-32" name = "__codelineno-32-32" href = "#__codelineno-32-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 i 越过数组头部后，回到尾部< / span >
< a id = "__codelineno-32-33" name = "__codelineno-32-33" href = "#__codelineno-32-33" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-32-34" name = "__codelineno-32-34" href = "#__codelineno-32-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-35" name = "__codelineno-32-35" href = "#__codelineno-32-35" > < / a >
< a id = "__codelineno-32-36" name = "__codelineno-32-36" href = "#__codelineno-32-36" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首入队 */< / span >
< a id = "__codelineno-32-37" name = "__codelineno-32-37" href = "#__codelineno-32-37" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushFirst< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-38" name = "__codelineno-32-38" href = "#__codelineno-32-38" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-39" name = "__codelineno-32-39" href = "#__codelineno-32-39" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "n" > Exception< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-40" name = "__codelineno-32-40" href = "#__codelineno-32-40" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-41" name = "__codelineno-32-41" href = "#__codelineno-32-41" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向左移动一位< / span >
< a id = "__codelineno-32-42" name = "__codelineno-32-42" href = "#__codelineno-32-42" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 _front 越过数组头部后回到尾部< / span >
< a id = "__codelineno-32-43" name = "__codelineno-32-43" href = "#__codelineno-32-43" > < / a > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-44" name = "__codelineno-32-44" href = "#__codelineno-32-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队首< / span >
< a id = "__codelineno-32-45" name = "__codelineno-32-45" href = "#__codelineno-32-45" > < / a > < span class = "w" > < / span > < span class = "n" > _nums< / span > < span class = "p" > [< / span > < span class = "n" > _front< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-46" name = "__codelineno-32-46" href = "#__codelineno-32-46" > < / a > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-47" name = "__codelineno-32-47" href = "#__codelineno-32-47" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-48" name = "__codelineno-32-48" href = "#__codelineno-32-48" > < / a >
< a id = "__codelineno-32-49" name = "__codelineno-32-49" href = "#__codelineno-32-49" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾入队 */< / span >
< a id = "__codelineno-32-50" name = "__codelineno-32-50" href = "#__codelineno-32-50" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pushLast< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-51" name = "__codelineno-32-51" href = "#__codelineno-32-51" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _queSize< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-52" name = "__codelineno-32-52" href = "#__codelineno-32-52" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "n" > Exception< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-53" name = "__codelineno-32-53" href = "#__codelineno-32-53" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-54" name = "__codelineno-32-54" href = "#__codelineno-32-54" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-32-55" name = "__codelineno-32-55" href = "#__codelineno-32-55" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-56" name = "__codelineno-32-56" href = "#__codelineno-32-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
< a id = "__codelineno-32-57" name = "__codelineno-32-57" href = "#__codelineno-32-57" > < / a > < span class = "w" > < / span > < span class = "n" > _nums< / span > < span class = "p" > [< / span > < span class = "n" > rear< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-58" name = "__codelineno-32-58" href = "#__codelineno-32-58" > < / a > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-59" name = "__codelineno-32-59" href = "#__codelineno-32-59" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-60" name = "__codelineno-32-60" href = "#__codelineno-32-60" > < / a >
< a id = "__codelineno-32-61" name = "__codelineno-32-61" href = "#__codelineno-32-61" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队首出队 */< / span >
< a id = "__codelineno-32-62" name = "__codelineno-32-62" href = "#__codelineno-32-62" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-63" name = "__codelineno-32-63" href = "#__codelineno-32-63" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-32-64" name = "__codelineno-32-64" href = "#__codelineno-32-64" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向右移动一位< / span >
< a id = "__codelineno-32-65" name = "__codelineno-32-65" href = "#__codelineno-32-65" > < / a > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-66" name = "__codelineno-32-66" href = "#__codelineno-32-66" > < / a > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-67" name = "__codelineno-32-67" href = "#__codelineno-32-67" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-68" name = "__codelineno-32-68" href = "#__codelineno-32-68" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-69" name = "__codelineno-32-69" href = "#__codelineno-32-69" > < / a >
< a id = "__codelineno-32-70" name = "__codelineno-32-70" href = "#__codelineno-32-70" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 队尾出队 */< / span >
< a id = "__codelineno-32-71" name = "__codelineno-32-71" href = "#__codelineno-32-71" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > popLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-72" name = "__codelineno-32-72" href = "#__codelineno-32-72" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-32-73" name = "__codelineno-32-73" href = "#__codelineno-32-73" > < / a > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-74" name = "__codelineno-32-74" href = "#__codelineno-32-74" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kt" > num< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-75" name = "__codelineno-32-75" href = "#__codelineno-32-75" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-76" name = "__codelineno-32-76" href = "#__codelineno-32-76" > < / a >
< a id = "__codelineno-32-77" name = "__codelineno-32-77" href = "#__codelineno-32-77" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-32-78" name = "__codelineno-32-78" href = "#__codelineno-32-78" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekFirst< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-79" name = "__codelineno-32-79" href = "#__codelineno-32-79" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-80" name = "__codelineno-32-80" href = "#__codelineno-32-80" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "n" > Exception< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-81" name = "__codelineno-32-81" href = "#__codelineno-32-81" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-82" name = "__codelineno-32-82" href = "#__codelineno-32-82" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _nums< / span > < span class = "p" > [< / span > < span class = "n" > _front< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-32-83" name = "__codelineno-32-83" href = "#__codelineno-32-83" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-84" name = "__codelineno-32-84" href = "#__codelineno-32-84" > < / a >
< a id = "__codelineno-32-85" name = "__codelineno-32-85" href = "#__codelineno-32-85" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队尾元素 */< / span >
< a id = "__codelineno-32-86" name = "__codelineno-32-86" href = "#__codelineno-32-86" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peekLast< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-87" name = "__codelineno-32-87" href = "#__codelineno-32-87" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-88" name = "__codelineno-32-88" href = "#__codelineno-32-88" > < / a > < span class = "w" > < / span > < span class = "k" > throw< / span > < span class = "w" > < / span > < span class = "n" > Exception< / span > < span class = "p" > (< / span > < span class = "s2" > " 双向队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-89" name = "__codelineno-32-89" href = "#__codelineno-32-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-90" name = "__codelineno-32-90" href = "#__codelineno-32-90" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾元素索引< / span >
< a id = "__codelineno-32-91" name = "__codelineno-32-91" href = "#__codelineno-32-91" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > last< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > _front< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-92" name = "__codelineno-32-92" href = "#__codelineno-32-92" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _nums< / span > < span class = "p" > [< / span > < span class = "n" > last< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-32-93" name = "__codelineno-32-93" href = "#__codelineno-32-93" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-94" name = "__codelineno-32-94" href = "#__codelineno-32-94" > < / a >
< a id = "__codelineno-32-95" name = "__codelineno-32-95" href = "#__codelineno-32-95" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组用于打印 */< / span >
< a id = "__codelineno-32-96" name = "__codelineno-32-96" href = "#__codelineno-32-96" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > toArray< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-97" name = "__codelineno-32-97" href = "#__codelineno-32-97" > < / a > < span class = "w" > < / span > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-32-98" name = "__codelineno-32-98" href = "#__codelineno-32-98" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "p" > .< / span > < span class = "n" > filled< / span > < span class = "p" > (< / span > < span class = "n" > _queSize< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > );< / span >
< a id = "__codelineno-32-99" name = "__codelineno-32-99" href = "#__codelineno-32-99" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "n" > _queSize< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-32-100" name = "__codelineno-32-100" href = "#__codelineno-32-100" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _nums< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > (< / span > < span class = "n" > j< / span > < span class = "p" > )];< / span >
< a id = "__codelineno-32-101" name = "__codelineno-32-101" href = "#__codelineno-32-101" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-102" name = "__codelineno-32-102" href = "#__codelineno-32-102" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-32-103" name = "__codelineno-32-103" href = "#__codelineno-32-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-32-104" name = "__codelineno-32-104" href = "#__codelineno-32-104" > < / a > < span class = "p" > }< / span >
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< h2 id = "533" > 5.3.3. 双向队列应用< a class = "headerlink" href = "#533" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 双向队列兼具栈与队列的逻辑，< strong > 因此它可以实现这两者的所有应用场景，同时提供更高的自由度< / strong > 。< / p >
< p > 我们知道，软件的“撤销”功能通常使用栈来实现：系统将每次更改操作 < code > push< / code > 到栈中，然后通过 < code > pop< / code > 实现撤销。然而，考虑到系统资源的限制，软件通常会限制撤销的步数（例如仅允许保存 < span class = "arithmatex" > \(50\)< / span > 步）。当栈的长度超过 < span class = "arithmatex" > \(50\)< / span > 时，软件需要在栈底（即队首）执行删除操作。< strong > 但栈无法实现该功能，此时就需要使用双向队列来替代栈< / strong > 。请注意，“撤销”的核心逻辑仍然遵循栈的先入后出原则，只是双向队列能够更加灵活地实现一些额外逻辑。< / p >
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< script id = "__config" type = "application/json" > { "base" : "../.." , "features" : [ "content.action.edit" , "content.code.annotate" , "content.code.copy" , "content.tabs.link" , "content.tooltips" , "navigation.indexes" , "navigation.sections" , "navigation.top" , "navigation.footer" , "navigation.tracking" , "search.highlight" , "search.share" , "search.suggest" , "toc.follow" ] , "search" : "../../assets/javascripts/workers/search.208ed371.min.js" , "translations" : { "clipboard.copied" : "\u5df2\u590d\u5236" , "clipboard.copy" : "\u590d\u5236" , "search.result.more.one" : "\u5728\u8be5\u9875\u4e0a\u8fd8\u6709 1 \u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u7ed3\u679c" , "search.result.more.other" : "\u5728\u8be5\u9875\u4e0a\u8fd8\u6709 # \u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u7ed3\u679c" , "search.result.none" : "\u6ca1\u6709\u627e\u5230\u7b26\u5408\u6761\u4ef6\u7684\u7ed3\u679c" , "search.result.one" : "\u627e\u5230 1 \u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u7ed3\u679c" , "search.result.other" : "# \u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u7ed3\u679c" , "search.result.placeholder" : "\u952e\u5165\u4ee5\u5f00\u59cb\u641c\u7d22" , "search.result.term.missing" : "\u7f3a\u5c11" , "select.version" : "\u9009\u62e9\u5f53\u524d\u7248\u672c" } } < / script >
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< script src = "../../assets/javascripts/bundle.fac441b0.min.js" > < / script >
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< script src = "../../javascripts/mathjax.js" > < / script >
< script src = "https://polyfill.io/v3/polyfill.min.js?features=es6" > < / script >
< script src = "https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js" > < / script >
< / body >
< / html >
