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跳转至
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Hello 算法
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5.2. 队列
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0. 写在前面
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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. 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. 复杂度分析
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2.1. 算法效率评估
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< a href = "../../chapter_computational_complexity/time_complexity/" class = "md-nav__link" >
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2.2. 时间复杂度
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< a href = "../../chapter_computational_complexity/space_complexity/" class = "md-nav__link" >
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2.3. 空间复杂度
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< a href = "../../chapter_computational_complexity/space_time_tradeoff/" class = "md-nav__link" >
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2.4. 权衡时间与空间
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< a href = "../../chapter_computational_complexity/summary/" class = "md-nav__link" >
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2.5. 小结
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3. 数据结构简介
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3. 数据结构简介
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3.1. 数据与内存
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< a href = "../../chapter_data_structure/classification_of_data_structure/" class = "md-nav__link" >
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3.2. 数据结构分类
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< a href = "../../chapter_data_structure/summary/" class = "md-nav__link" >
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3.3. 小结
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4. 数组与链表
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4. 数组与链表
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< li class = "md-nav__item" >
< a href = "../../chapter_array_and_linkedlist/array/" class = "md-nav__link" >
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4.1. 数组
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< a href = "../../chapter_array_and_linkedlist/linked_list/" class = "md-nav__link" >
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4.2. 链表
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< a href = "../../chapter_array_and_linkedlist/list/" class = "md-nav__link" >
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4.3. 列表
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< a href = "../../chapter_array_and_linkedlist/summary/" class = "md-nav__link" >
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4.4. 小结
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< label class = "md-nav__link" for = "__nav_6" id = "__nav_6_label" tabindex = "0" >
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5. 栈与队列
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5. 栈与队列
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< li class = "md-nav__item" >
< a href = "../stack/" class = "md-nav__link" >
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5.1. 栈
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5.2. 队列
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< a href = "./" class = "md-nav__link md-nav__link--active" >
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5.2. 队列
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目录
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< a href = "#521" class = "md-nav__link" >
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5.2.1. 队列常用操作
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< a href = "#522" class = "md-nav__link" >
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5.2.2. 队列实现
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< / a >
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< nav class = "md-nav" aria-label = "5.2.2. 队列实现" >
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< a href = "#_1" class = "md-nav__link" >
基于链表的实现
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< a href = "#_2" class = "md-nav__link" >
基于数组的实现
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5.2.3. 两种实现对比
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< a href = "#524" class = "md-nav__link" >
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5.2.4. 队列典型应用
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< a href = "../deque/" class = "md-nav__link" >
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5.3. 双向队列
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< a href = "../summary/" class = "md-nav__link" >
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5.4. 小结
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< label class = "md-nav__link" for = "__nav_7" id = "__nav_7_label" tabindex = "0" >
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6. 散列表
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< label class = "md-nav__title" for = "__nav_7" >
< span class = "md-nav__icon md-icon" > < / span >
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6. 散列表
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< li class = "md-nav__item" >
< a href = "../../chapter_hashing/hash_map/" class = "md-nav__link" >
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6.1. 哈希表
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< a href = "../../chapter_hashing/hash_collision/" class = "md-nav__link" >
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6.2. 哈希冲突处理
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< a href = "../../chapter_hashing/summary/" class = "md-nav__link" >
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6.3. 小结
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< label class = "md-nav__link" for = "__nav_8" id = "__nav_8_label" tabindex = "0" >
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7. 树
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7. 树
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< li class = "md-nav__item" >
< a href = "../../chapter_tree/binary_tree/" class = "md-nav__link" >
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7.1. 二叉树
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< li class = "md-nav__item" >
< a href = "../../chapter_tree/binary_tree_traversal/" class = "md-nav__link" >
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7.2. 二叉树遍历
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< a href = "../../chapter_tree/binary_search_tree/" class = "md-nav__link" >
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7.3. 二叉搜索树
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< a href = "../../chapter_tree/avl_tree/" class = "md-nav__link" >
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7.4. AVL 树 *
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< a href = "../../chapter_tree/summary/" class = "md-nav__link" >
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7.5. 小结
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< label class = "md-nav__link" for = "__nav_9" id = "__nav_9_label" tabindex = "0" >
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8. 堆
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< label class = "md-nav__title" for = "__nav_9" >
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8. 堆
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< li class = "md-nav__item" >
< a href = "../../chapter_heap/heap/" class = "md-nav__link" >
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8.1. 堆
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< a href = "../../chapter_heap/build_heap/" class = "md-nav__link" >
8.2. 建堆操作 *
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< a href = "../../chapter_heap/summary/" class = "md-nav__link" >
8.3. 小结
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< input class = "md-nav__toggle md-toggle " type = "checkbox" id = "__nav_10" >
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< label class = "md-nav__link" for = "__nav_10" id = "__nav_10_label" tabindex = "0" >
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9. 图
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< label class = "md-nav__title" for = "__nav_10" >
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9. 图
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< li class = "md-nav__item" >
< a href = "../../chapter_graph/graph/" class = "md-nav__link" >
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9.1. 图
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< a href = "../../chapter_graph/graph_operations/" class = "md-nav__link" >
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9.2. 图基础操作
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< li class = "md-nav__item" >
< a href = "../../chapter_graph/graph_traversal/" class = "md-nav__link" >
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9.3. 图的遍历（ ）
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< / a >
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< a href = "../../chapter_graph/summary/" class = "md-nav__link" >
9.4. 小结
< / a >
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< input class = "md-nav__toggle md-toggle " type = "checkbox" id = "__nav_11" >
< label class = "md-nav__link" for = "__nav_11" id = "__nav_11_label" tabindex = "0" >
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10. 查找算法
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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. 查找算法
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< / label >
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< li class = "md-nav__item" >
< a href = "../../chapter_searching/linear_search/" class = "md-nav__link" >
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10.1. 线性查找
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< / a >
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< li class = "md-nav__item" >
< a href = "../../chapter_searching/binary_search/" class = "md-nav__link" >
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10.2. 二分查找
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< li class = "md-nav__item" >
< a href = "../../chapter_searching/hashing_search/" class = "md-nav__link" >
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10.3. 哈希查找
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< li class = "md-nav__item" >
< a href = "../../chapter_searching/summary/" class = "md-nav__link" >
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10.4. 小结
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< input class = "md-nav__toggle md-toggle " type = "checkbox" id = "__nav_12" >
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< label class = "md-nav__link" for = "__nav_12" id = "__nav_12_label" tabindex = "0" >
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11. 排序算法
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< span class = "md-nav__icon md-icon" > < / span >
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< label class = "md-nav__title" for = "__nav_12" >
< span class = "md-nav__icon md-icon" > < / span >
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11. 排序算法
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/intro_to_sort/" class = "md-nav__link" >
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11.1. 排序简介
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< a href = "../../chapter_sorting/bubble_sort/" class = "md-nav__link" >
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11.2. 冒泡排序
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/insertion_sort/" class = "md-nav__link" >
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11.3. 插入排序
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/quick_sort/" class = "md-nav__link" >
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11.4. 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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11.5. 归并排序
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< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/counting_sort/" class = "md-nav__link" >
11.6. 计数排序（ ）
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../chapter_sorting/summary/" class = "md-nav__link" >
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11.7. 小结
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< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--section md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle " type = "checkbox" id = "__nav_13" >
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< label class = "md-nav__link" for = "__nav_13" id = "__nav_13_label" tabindex = "0" >
12. 附录
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" data-md-level = "1" aria-labelledby = "__nav_13_label" aria-expanded = "false" >
< label class = "md-nav__title" for = "__nav_13" >
< span class = "md-nav__icon md-icon" > < / span >
12. 附录
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< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
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12.1. 编程环境安装
< / a >
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12.2. 一起参与创作
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< / ul >
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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_reference/" > 参考文献< / a >
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< nav class = "md-nav" data-md-level = "1" aria-labelledby = "__nav_14_label" aria-expanded = "false" >
< label class = "md-nav__title" for = "__nav_14" >
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< span class = "md-nav__icon md-icon" > < / span >
参考文献
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< / ul >
< / nav >
< / li >
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< div class = "md-sidebar md-sidebar--secondary" data-md-component = "sidebar" data-md-type = "toc" >
< div class = "md-sidebar__scrollwrap" >
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< nav class = "md-nav md-nav--secondary" aria-label = "目录" >
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< span class = "md-nav__icon md-icon" > < / span >
目录
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< ul class = "md-nav__list" data-md-component = "toc" data-md-scrollfix >
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< a href = "#521" class = "md-nav__link" >
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5.2.1. 队列常用操作
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< li class = "md-nav__item" >
< a href = "#522" class = "md-nav__link" >
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5.2.2. 队列实现
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< / a >
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< ul class = "md-nav__list" >
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< a href = "#_1" class = "md-nav__link" >
基于链表的实现
< / a >
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< li class = "md-nav__item" >
< a href = "#_2" class = "md-nav__link" >
基于数组的实现
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5.2.3. 两种实现对比
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5.2.4. 队列典型应用
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< / a >
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< / ul >
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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/queue.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 = "52" > 5.2. 队列< a class = "headerlink" href = "#52" title = "Permanent link" > ¶ < / a > < / h1 >
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< p > 「队列 Queue」是一种遵循「先入先出 first in, first out」数据操作规则的线性数据结构。顾名思义， ， ， < / p >
< p > 我们将队列头部称为「队首」，队列尾部称为「队尾」，将把元素加入队尾的操作称为「入队」，删除队首元素的操作称为「出队」。< / p >
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< p > < img alt = "队列的先入先出规则" src = "../queue.assets/queue_operations.png" / > < / p >
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< p align = "center" > Fig. 队列的先入先出规则 < / p >
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< h2 id = "521" > 5.2.1. 队列常用操作< a class = "headerlink" href = "#521" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 队列的常用操作见下表。需要注意，不同编程语言的方法名是不同的，在这里我们采用与栈相同的方法命名。< / 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 > push()< / td >
< td > 元素入队，即将元素添加至队尾< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< tr >
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< td > pop()< / td >
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< td > 队首元素出队< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< tr >
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< td > peek()< / td >
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< td > 访问队首元素< / td >
< td > < span class = "arithmatex" > \(O(1)\)< / span > < / td >
< / tr >
< / tbody >
< / table >
< / div >
< p > 我们可以直接使用编程语言实现好的队列类。< / p >
< div class = "tabbed-set tabbed-alternate" data-tabs = "1:10" > < 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" / > < 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 > < / div >
< div class = "tabbed-content" >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-0-1" name = "__codelineno-0-1" href = "#__codelineno-0-1" > < / a > < span class = "cm" > /* 初始化队列 */< / span >
< a id = "__codelineno-0-2" name = "__codelineno-0-2" href = "#__codelineno-0-2" > < / a > < span class = "n" > Queue< / span > < span class = "o" > < < / span > < span class = "n" > Integer< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > queue< / 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" > queue< / span > < span class = "p" > .< / span > < span class = "na" > offer< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-6" name = "__codelineno-0-6" href = "#__codelineno-0-6" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "na" > offer< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-7" name = "__codelineno-0-7" href = "#__codelineno-0-7" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "na" > offer< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-8" name = "__codelineno-0-8" href = "#__codelineno-0-8" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "na" > offer< / span > < span class = "p" > (< / span > < span class = "mi" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-9" name = "__codelineno-0-9" href = "#__codelineno-0-9" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "na" > offer< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / 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" > /* 访问队首元素 */< / 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" > peek< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "na" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-0-13" name = "__codelineno-0-13" href = "#__codelineno-0-13" > < / a >
< a id = "__codelineno-0-14" name = "__codelineno-0-14" href = "#__codelineno-0-14" > < / a > < span class = "cm" > /* 元素出队 */< / span >
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< a id = "__codelineno-0-15" name = "__codelineno-0-15" href = "#__codelineno-0-15" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "na" > poll< / span > < span class = "p" > ();< / span >
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< a id = "__codelineno-0-16" name = "__codelineno-0-16" href = "#__codelineno-0-16" > < / a >
< a id = "__codelineno-0-17" name = "__codelineno-0-17" href = "#__codelineno-0-17" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-0-18" name = "__codelineno-0-18" href = "#__codelineno-0-18" > < / 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" > queue< / span > < span class = "p" > .< / span > < span class = "na" > size< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-0-19" name = "__codelineno-0-19" href = "#__codelineno-0-19" > < / a >
< a id = "__codelineno-0-20" name = "__codelineno-0-20" href = "#__codelineno-0-20" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-0-21" name = "__codelineno-0-21" href = "#__codelineno-0-21" > < / 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" > queue< / 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" > queue.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-1-1" name = "__codelineno-1-1" href = "#__codelineno-1-1" > < / a > < span class = "cm" > /* 初始化队列 */< / span >
< a id = "__codelineno-1-2" name = "__codelineno-1-2" href = "#__codelineno-1-2" > < / 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" > queue< / 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" > queue< / span > < span class = "p" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-6" name = "__codelineno-1-6" href = "#__codelineno-1-6" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-7" name = "__codelineno-1-7" href = "#__codelineno-1-7" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-8" name = "__codelineno-1-8" href = "#__codelineno-1-8" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "mi" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-9" name = "__codelineno-1-9" href = "#__codelineno-1-9" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / 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" > /* 访问队首元素 */< / 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" > queue< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-1-13" name = "__codelineno-1-13" href = "#__codelineno-1-13" > < / a >
< a id = "__codelineno-1-14" name = "__codelineno-1-14" href = "#__codelineno-1-14" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-1-15" name = "__codelineno-1-15" href = "#__codelineno-1-15" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > pop< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-1-16" name = "__codelineno-1-16" href = "#__codelineno-1-16" > < / a >
< a id = "__codelineno-1-17" name = "__codelineno-1-17" href = "#__codelineno-1-17" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-1-18" name = "__codelineno-1-18" href = "#__codelineno-1-18" > < / 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" > queue< / span > < span class = "p" > .< / span > < span class = "n" > size< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-1-19" name = "__codelineno-1-19" href = "#__codelineno-1-19" > < / a >
< a id = "__codelineno-1-20" name = "__codelineno-1-20" href = "#__codelineno-1-20" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-1-21" name = "__codelineno-1-21" href = "#__codelineno-1-21" > < / 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" > queue< / span > < span class = "p" > .< / span > < span class = "n" > empty< / span > < span class = "p" > ();< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-2-1" name = "__codelineno-2-1" href = "#__codelineno-2-1" > < / a > < span class = "sd" > " " " 初始化队列 " " " < / span >
< a id = "__codelineno-2-2" name = "__codelineno-2-2" href = "#__codelineno-2-2" > < / a > < span class = "c1" > # 在 Python 中，我们一般将双向队列类 deque 看作队列使用< / span >
< a id = "__codelineno-2-3" name = "__codelineno-2-3" href = "#__codelineno-2-3" > < / a > < span class = "c1" > # 虽然 queue.Queue() 是纯正的队列类，但不太好用，因此不建议< / span >
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< a id = "__codelineno-2-4" name = "__codelineno-2-4" href = "#__codelineno-2-4" > < / a > < span class = "n" > que< / 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 >
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< a id = "__codelineno-2-5" name = "__codelineno-2-5" href = "#__codelineno-2-5" > < / a >
< a id = "__codelineno-2-6" name = "__codelineno-2-6" href = "#__codelineno-2-6" > < / a > < span class = "sd" > " " " 元素入队 " " " < / span >
< a id = "__codelineno-2-7" name = "__codelineno-2-7" href = "#__codelineno-2-7" > < / a > < span class = "n" > que< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-8" name = "__codelineno-2-8" href = "#__codelineno-2-8" > < / a > < span class = "n" > que< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-9" name = "__codelineno-2-9" href = "#__codelineno-2-9" > < / a > < span class = "n" > que< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-10" name = "__codelineno-2-10" href = "#__codelineno-2-10" > < / a > < span class = "n" > que< / 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-2-11" name = "__codelineno-2-11" href = "#__codelineno-2-11" > < / a > < span class = "n" > que< / 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-2-12" name = "__codelineno-2-12" href = "#__codelineno-2-12" > < / a >
< a id = "__codelineno-2-13" name = "__codelineno-2-13" href = "#__codelineno-2-13" > < / a > < span class = "sd" > " " " 访问队首元素 " " " < / span >
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< a id = "__codelineno-2-14" name = "__codelineno-2-14" href = "#__codelineno-2-14" > < / a > < span class = "n" > front< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "n" > que< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ];< / span >
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< a id = "__codelineno-2-15" name = "__codelineno-2-15" href = "#__codelineno-2-15" > < / a >
< a id = "__codelineno-2-16" name = "__codelineno-2-16" href = "#__codelineno-2-16" > < / a > < span class = "sd" > " " " 元素出队 " " " < / span >
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< a id = "__codelineno-2-17" name = "__codelineno-2-17" href = "#__codelineno-2-17" > < / a > < span class = "n" > pop< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / span > < span class = "n" > que< / span > < span class = "o" > .< / span > < span class = "n" > popleft< / span > < span class = "p" > ()< / span >
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< a id = "__codelineno-2-18" name = "__codelineno-2-18" href = "#__codelineno-2-18" > < / a >
< a id = "__codelineno-2-19" name = "__codelineno-2-19" href = "#__codelineno-2-19" > < / a > < span class = "sd" > " " " 获取队列的长度 " " " < / span >
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< 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" > que< / span > < span class = "p" > )< / span >
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< a id = "__codelineno-2-21" name = "__codelineno-2-21" href = "#__codelineno-2-21" > < / a >
< a id = "__codelineno-2-22" name = "__codelineno-2-22" href = "#__codelineno-2-22" > < / a > < span class = "sd" > " " " 判断队列是否为空 " " " < / span >
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< 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" > que< / span > < span class = "p" > )< / span > < span class = "o" > ==< / span > < span class = "mi" > 0< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue_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 作为队列来使用< / span >
< a id = "__codelineno-3-3" name = "__codelineno-3-3" href = "#__codelineno-3-3" > < / a > < span class = "nx" > queue< / 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" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > PushBack< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-7" name = "__codelineno-3-7" href = "#__codelineno-3-7" > < / a > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > PushBack< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-8" name = "__codelineno-3-8" href = "#__codelineno-3-8" > < / a > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > PushBack< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-9" name = "__codelineno-3-9" href = "#__codelineno-3-9" > < / a > < span class = "nx" > queue< / 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-3-10" name = "__codelineno-3-10" href = "#__codelineno-3-10" > < / a > < span class = "nx" > queue< / 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-3-11" 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" > /* 访问队首元素 */< / span >
< a id = "__codelineno-3-13" name = "__codelineno-3-13" href = "#__codelineno-3-13" > < / a > < span class = "nx" > peek< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > Front< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-14" name = "__codelineno-3-14" href = "#__codelineno-3-14" > < / a >
< a id = "__codelineno-3-15" name = "__codelineno-3-15" href = "#__codelineno-3-15" > < / a > < span class = "cm" > /* 元素出队 */< / span >
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< a id = "__codelineno-3-16" name = "__codelineno-3-16" href = "#__codelineno-3-16" > < / a > < span class = "nx" > pop< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > Front< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-17" name = "__codelineno-3-17" href = "#__codelineno-3-17" > < / a > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > Remove< / span > < span class = "p" > (< / span > < span class = "nx" > pop< / span > < span class = "p" > )< / span >
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< a id = "__codelineno-3-18" name = "__codelineno-3-18" href = "#__codelineno-3-18" > < / a >
< a id = "__codelineno-3-19" name = "__codelineno-3-19" href = "#__codelineno-3-19" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-3-20" name = "__codelineno-3-20" href = "#__codelineno-3-20" > < / a > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > Len< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-21" name = "__codelineno-3-21" href = "#__codelineno-3-21" > < / a >
< a id = "__codelineno-3-22" name = "__codelineno-3-22" href = "#__codelineno-3-22" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-3-23" name = "__codelineno-3-23" href = "#__codelineno-3-23" > < / a > < span class = "nx" > isEmpty< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > queue< / 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" > queue.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 没有内置的队列，可以把 Array 当作队列来使用< / 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" > queue< / 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" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-7" name = "__codelineno-4-7" href = "#__codelineno-4-7" > < / a > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 3< / span > < span class = "p" > );< / span >
< a id = "__codelineno-4-8" name = "__codelineno-4-8" href = "#__codelineno-4-8" > < / a > < span class = "nx" > queue< / 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-4-9" name = "__codelineno-4-9" href = "#__codelineno-4-9" > < / a > < span class = "nx" > queue< / 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-4-10" name = "__codelineno-4-10" href = "#__codelineno-4-10" > < / a > < span class = "nx" > queue< / 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-4-11" name = "__codelineno-4-11" href = "#__codelineno-4-11" > < / a >
< a id = "__codelineno-4-12" name = "__codelineno-4-12" href = "#__codelineno-4-12" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-4-13" name = "__codelineno-4-13" href = "#__codelineno-4-13" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > peek< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > queue< / span > < span class = "p" > [< / span > < span class = "mf" > 0< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-4-14" name = "__codelineno-4-14" href = "#__codelineno-4-14" > < / a >
< a id = "__codelineno-4-15" name = "__codelineno-4-15" href = "#__codelineno-4-15" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-4-16" name = "__codelineno-4-16" href = "#__codelineno-4-16" > < / a > < span class = "c1" > // 底层是数组，因此 shift() 方法的时间复杂度为 O(n)< / span >
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< 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" > pop< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > shift< / span > < span class = "p" > ();< / span >
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< a id = "__codelineno-4-18" name = "__codelineno-4-18" href = "#__codelineno-4-18" > < / a >
< a id = "__codelineno-4-19" name = "__codelineno-4-19" href = "#__codelineno-4-19" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-4-20" name = "__codelineno-4-20" href = "#__codelineno-4-20" > < / 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" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-4-21" name = "__codelineno-4-21" href = "#__codelineno-4-21" > < / a >
< a id = "__codelineno-4-22" name = "__codelineno-4-22" href = "#__codelineno-4-22" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-4-23" name = "__codelineno-4-23" href = "#__codelineno-4-23" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > empty< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > queue< / 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" > 0< / span > < span class = "p" > ;< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue.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 没有内置的队列，可以把 Array 当作队列来使用 < / 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" > queue< / 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" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-7" name = "__codelineno-5-7" href = "#__codelineno-5-7" > < / a > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > push< / span > < span class = "p" > (< / span > < span class = "mf" > 3< / span > < span class = "p" > );< / span >
< a id = "__codelineno-5-8" name = "__codelineno-5-8" href = "#__codelineno-5-8" > < / a > < span class = "nx" > queue< / 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-5-9" name = "__codelineno-5-9" href = "#__codelineno-5-9" > < / a > < span class = "nx" > queue< / 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-5-10" name = "__codelineno-5-10" href = "#__codelineno-5-10" > < / a > < span class = "nx" > queue< / 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-5-11" name = "__codelineno-5-11" href = "#__codelineno-5-11" > < / a >
< a id = "__codelineno-5-12" name = "__codelineno-5-12" href = "#__codelineno-5-12" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-5-13" name = "__codelineno-5-13" href = "#__codelineno-5-13" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > peek< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > queue< / span > < span class = "p" > [< / span > < span class = "mf" > 0< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-5-14" name = "__codelineno-5-14" href = "#__codelineno-5-14" > < / a >
< a id = "__codelineno-5-15" name = "__codelineno-5-15" href = "#__codelineno-5-15" > < / a > < span class = "cm" > /* 元素出队 */< / span >
< a id = "__codelineno-5-16" name = "__codelineno-5-16" href = "#__codelineno-5-16" > < / a > < span class = "c1" > // 底层是数组，因此 shift() 方法的时间复杂度为 O(n)< / span >
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< 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" > pop< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > shift< / span > < span class = "p" > ();< / span >
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< a id = "__codelineno-5-18" name = "__codelineno-5-18" href = "#__codelineno-5-18" > < / a >
< a id = "__codelineno-5-19" name = "__codelineno-5-19" href = "#__codelineno-5-19" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-5-20" name = "__codelineno-5-20" href = "#__codelineno-5-20" > < / 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" > queue< / span > < span class = "p" > .< / span > < span class = "nx" > length< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-5-21" name = "__codelineno-5-21" href = "#__codelineno-5-21" > < / a >
< a id = "__codelineno-5-22" name = "__codelineno-5-22" href = "#__codelineno-5-22" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-5-23" name = "__codelineno-5-23" href = "#__codelineno-5-23" > < / a > < span class = "kd" > const< / span > < span class = "w" > < / span > < span class = "nx" > empty< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > queue< / 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" > 0< / span > < span class = "p" > ;< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-6-1" name = "__codelineno-6-1" href = "#__codelineno-6-1" > < / a >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue.cs< / span > < pre > < span > < / span > < code > < a id = "__codelineno-7-1" name = "__codelineno-7-1" href = "#__codelineno-7-1" > < / a > < span class = "cm" > /* 初始化队列 */< / span >
< a id = "__codelineno-7-2" name = "__codelineno-7-2" href = "#__codelineno-7-2" > < / 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" > queue< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-7-3" name = "__codelineno-7-3" href = "#__codelineno-7-3" > < / a >
< a id = "__codelineno-7-4" name = "__codelineno-7-4" href = "#__codelineno-7-4" > < / a > < span class = "cm" > /* 元素入队 */< / span >
< a id = "__codelineno-7-5" name = "__codelineno-7-5" href = "#__codelineno-7-5" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Enqueue< / span > < span class = "p" > (< / span > < span class = "m" > 1< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-6" name = "__codelineno-7-6" href = "#__codelineno-7-6" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Enqueue< / span > < span class = "p" > (< / span > < span class = "m" > 3< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-7" name = "__codelineno-7-7" href = "#__codelineno-7-7" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Enqueue< / span > < span class = "p" > (< / span > < span class = "m" > 2< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-8" name = "__codelineno-7-8" href = "#__codelineno-7-8" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Enqueue< / span > < span class = "p" > (< / span > < span class = "m" > 5< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-9" name = "__codelineno-7-9" href = "#__codelineno-7-9" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Enqueue< / span > < span class = "p" > (< / span > < span class = "m" > 4< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-10" name = "__codelineno-7-10" href = "#__codelineno-7-10" > < / a >
< a id = "__codelineno-7-11" name = "__codelineno-7-11" href = "#__codelineno-7-11" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-7-12" name = "__codelineno-7-12" href = "#__codelineno-7-12" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peek< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-7-13" name = "__codelineno-7-13" href = "#__codelineno-7-13" > < / a >
< a id = "__codelineno-7-14" name = "__codelineno-7-14" href = "#__codelineno-7-14" > < / a > < span class = "cm" > /* 元素出队 */< / span >
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< a id = "__codelineno-7-15" name = "__codelineno-7-15" href = "#__codelineno-7-15" > < / a > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Dequeue< / span > < span class = "p" > ();< / span >
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< a id = "__codelineno-7-16" name = "__codelineno-7-16" href = "#__codelineno-7-16" > < / a >
< a id = "__codelineno-7-17" name = "__codelineno-7-17" href = "#__codelineno-7-17" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-7-18" name = "__codelineno-7-18" href = "#__codelineno-7-18" > < / 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" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Count< / span > < span class = "p" > ();< / 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" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-7-21" name = "__codelineno-7-21" href = "#__codelineno-7-21" > < / 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" > queue< / span > < span class = "p" > .< / span > < span class = "n" > Count< / 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 >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue.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 没有内置的队列类，可以把 Array 当作队列来使用< / span >
< a id = "__codelineno-8-3" name = "__codelineno-8-3" href = "#__codelineno-8-3" > < / a > < span class = "kd" > var< / span > < span class = "nv" > queue< / 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" > queue< / span > < span class = "p" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-7" name = "__codelineno-8-7" href = "#__codelineno-8-7" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 3< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-8" name = "__codelineno-8-8" href = "#__codelineno-8-8" > < / a > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-9" name = "__codelineno-8-9" href = "#__codelineno-8-9" > < / a > < span class = "n" > queue< / 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-8-10" name = "__codelineno-8-10" href = "#__codelineno-8-10" > < / a > < span class = "n" > queue< / 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-8-11" 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" > /* 访问队首元素 */< / span >
< a id = "__codelineno-8-13" name = "__codelineno-8-13" href = "#__codelineno-8-13" > < / a > < span class = "kd" > let< / span > < span class = "nv" > peek< / span > < span class = "p" > =< / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "bp" > first< / span > < span class = "p" > !< / span >
< a id = "__codelineno-8-14" name = "__codelineno-8-14" href = "#__codelineno-8-14" > < / a >
< a id = "__codelineno-8-15" name = "__codelineno-8-15" href = "#__codelineno-8-15" > < / a > < span class = "cm" > /* 元素出队 */< / span >
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< a id = "__codelineno-8-16" name = "__codelineno-8-16" href = "#__codelineno-8-16" > < / a > < span class = "c1" > // 由于是数组，因此 removeFirst 的复杂度为 O(n)< / span >
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< a id = "__codelineno-8-17" name = "__codelineno-8-17" href = "#__codelineno-8-17" > < / a > < span class = "kd" > let< / span > < span class = "nv" > pool< / span > < span class = "p" > =< / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "n" > removeFirst< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-8-18" name = "__codelineno-8-18" href = "#__codelineno-8-18" > < / a >
< a id = "__codelineno-8-19" name = "__codelineno-8-19" href = "#__codelineno-8-19" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-8-20" name = "__codelineno-8-20" href = "#__codelineno-8-20" > < / a > < span class = "kd" > let< / span > < span class = "nv" > size< / span > < span class = "p" > =< / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "bp" > count< / span >
< a id = "__codelineno-8-21" name = "__codelineno-8-21" href = "#__codelineno-8-21" > < / a >
< a id = "__codelineno-8-22" name = "__codelineno-8-22" href = "#__codelineno-8-22" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-8-23" name = "__codelineno-8-23" href = "#__codelineno-8-23" > < / a > < span class = "kd" > let< / span > < span class = "nv" > isEmpty< / span > < span class = "p" > =< / span > < span class = "n" > queue< / span > < span class = "p" > .< / span > < span class = "bp" > isEmpty< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > queue.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-9-1" name = "__codelineno-9-1" href = "#__codelineno-9-1" > < / a >
< / code > < / pre > < / div >
< / div >
< / div >
< / div >
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< h2 id = "522" > 5.2.2. 队列实现< a class = "headerlink" href = "#522" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 队列需要一种可以在一端添加，并在另一端删除的数据结构，也可以使用链表或数组来实现。< / p >
< h3 id = "_1" > 基于链表的实现< a class = "headerlink" href = "#_1" title = "Permanent link" > ¶ < / a > < / h3 >
< p > 我们将链表的「头结点」和「尾结点」分别看作是队首和队尾，并规定队尾只可添加结点，队首只可删除结点。< / p >
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< div class = "tabbed-set tabbed-alternate" data-tabs = "2:3" > < 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" / > < div class = "tabbed-labels" > < label for = "__tabbed_2_1" > LinkedListQueue< / label > < label for = "__tabbed_2_2" > push()< / label > < label for = "__tabbed_2_3" > pop()< / label > < / div >
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< div class = "tabbed-content" >
< div class = "tabbed-block" >
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< p > < img alt = "基于链表实现队列的入队出队操作" src = "../queue.assets/linkedlist_queue.png" / > < / p >
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< / div >
< div class = "tabbed-block" >
< p > < img alt = "linkedlist_queue_push" src = "../queue.assets/linkedlist_queue_push.png" / > < / p >
< / div >
< div class = "tabbed-block" >
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< p > < img alt = "linkedlist_queue_pop" src = "../queue.assets/linkedlist_queue_pop.png" / > < / p >
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< / div >
< / div >
< / div >
< p > 以下是使用链表实现队列的示例代码。< / p >
< div class = "tabbed-set tabbed-alternate" data-tabs = "3:10" > < 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" / > < 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 > < / div >
< div class = "tabbed-content" >
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< div class = "highlight" > < span class = "filename" > linkedlist_queue.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-10-1" name = "__codelineno-10-1" href = "#__codelineno-10-1" > < / a > < span class = "cm" > /* 基于链表实现的队列 */< / span >
< a id = "__codelineno-10-2" name = "__codelineno-10-2" href = "#__codelineno-10-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > LinkedListQueue< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-3" name = "__codelineno-10-3" href = "#__codelineno-10-3" > < / 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" > // 头结点 front ，尾结点 rear < / span >
< a id = "__codelineno-10-4" name = "__codelineno-10-4" href = "#__codelineno-10-4" > < / 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" > 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-10-5" name = "__codelineno-10-5" href = "#__codelineno-10-5" > < / a >
< a id = "__codelineno-10-6" name = "__codelineno-10-6" href = "#__codelineno-10-6" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "nf" > LinkedListQueue< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-7" name = "__codelineno-10-7" href = "#__codelineno-10-7" > < / a > < span class = "w" > < / 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-10-8" name = "__codelineno-10-8" href = "#__codelineno-10-8" > < / a > < 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-10-9" name = "__codelineno-10-9" href = "#__codelineno-10-9" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-10" name = "__codelineno-10-10" href = "#__codelineno-10-10" > < / a >
< a id = "__codelineno-10-11" name = "__codelineno-10-11" href = "#__codelineno-10-11" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-10-12" name = "__codelineno-10-12" href = "#__codelineno-10-12" > < / 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-10-13" name = "__codelineno-10-13" href = "#__codelineno-10-13" > < / 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-10-14" name = "__codelineno-10-14" href = "#__codelineno-10-14" > < / a > < span class = "w" > < / span > < span class = "p" > }< / 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 = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-10-17" name = "__codelineno-10-17" href = "#__codelineno-10-17" > < / 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-10-18" name = "__codelineno-10-18" href = "#__codelineno-10-18" > < / 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-10-19" name = "__codelineno-10-19" href = "#__codelineno-10-19" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-20" name = "__codelineno-10-20" href = "#__codelineno-10-20" > < / a >
< a id = "__codelineno-10-21" name = "__codelineno-10-21" href = "#__codelineno-10-21" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-10-22" name = "__codelineno-10-22" href = "#__codelineno-10-22" > < / 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" > 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 = "p" > {< / span >
< a id = "__codelineno-10-23" name = "__codelineno-10-23" href = "#__codelineno-10-23" > < / a > < span class = "w" > < / span > < span class = "c1" > // 尾结点后添加 num< / span >
< a id = "__codelineno-10-24" name = "__codelineno-10-24" href = "#__codelineno-10-24" > < / 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-10-25" name = "__codelineno-10-25" href = "#__codelineno-10-25" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-10-26" name = "__codelineno-10-26" href = "#__codelineno-10-26" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / 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 > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-27" name = "__codelineno-10-27" href = "#__codelineno-10-27" > < / 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-10-28" name = "__codelineno-10-28" href = "#__codelineno-10-28" > < / 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-10-29" name = "__codelineno-10-29" href = "#__codelineno-10-29" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列不为空，则将该结点添加到尾结点后< / span >
< a id = "__codelineno-10-30" name = "__codelineno-10-30" href = "#__codelineno-10-30" > < / 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-10-31" name = "__codelineno-10-31" href = "#__codelineno-10-31" > < / 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-10-32" name = "__codelineno-10-32" href = "#__codelineno-10-32" > < / 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-10-33" name = "__codelineno-10-33" href = "#__codelineno-10-33" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-34" name = "__codelineno-10-34" href = "#__codelineno-10-34" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-35" name = "__codelineno-10-35" href = "#__codelineno-10-35" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-36" name = "__codelineno-10-36" href = "#__codelineno-10-36" > < / a >
< a id = "__codelineno-10-37" name = "__codelineno-10-37" href = "#__codelineno-10-37" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-10-38" name = "__codelineno-10-38" href = "#__codelineno-10-38" > < / 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" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-10-39" name = "__codelineno-10-39" href = "#__codelineno-10-39" > < / 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" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-10-40" name = "__codelineno-10-40" href = "#__codelineno-10-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头结点< / span >
< a id = "__codelineno-10-41" name = "__codelineno-10-41" href = "#__codelineno-10-41" > < / 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" > front< / span > < span class = "p" > .< / span > < span class = "na" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-42" name = "__codelineno-10-42" href = "#__codelineno-10-42" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-43" name = "__codelineno-10-43" href = "#__codelineno-10-43" > < / 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-10-44" name = "__codelineno-10-44" href = "#__codelineno-10-44" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-45" name = "__codelineno-10-45" href = "#__codelineno-10-45" > < / a >
< a id = "__codelineno-10-46" name = "__codelineno-10-46" href = "#__codelineno-10-46" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-10-47" name = "__codelineno-10-47" href = "#__codelineno-10-47" > < / 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" > peek< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-48" name = "__codelineno-10-48" href = "#__codelineno-10-48" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / 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-10-49" name = "__codelineno-10-49" href = "#__codelineno-10-49" > < / 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" > EmptyStackException< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-10-50" name = "__codelineno-10-50" href = "#__codelineno-10-50" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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-10-51" name = "__codelineno-10-51" href = "#__codelineno-10-51" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-52" name = "__codelineno-10-52" href = "#__codelineno-10-52" > < / a >
< a id = "__codelineno-10-53" name = "__codelineno-10-53" href = "#__codelineno-10-53" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 将链表转化为 Array 并返回 */< / span >
< a id = "__codelineno-10-54" name = "__codelineno-10-54" href = "#__codelineno-10-54" > < / 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-10-55" name = "__codelineno-10-55" href = "#__codelineno-10-55" > < / 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-10-56" name = "__codelineno-10-56" href = "#__codelineno-10-56" > < / 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-10-57" name = "__codelineno-10-57" href = "#__codelineno-10-57" > < / 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-10-58" name = "__codelineno-10-58" href = "#__codelineno-10-58" > < / 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-10-59" name = "__codelineno-10-59" href = "#__codelineno-10-59" > < / 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-10-60" name = "__codelineno-10-60" href = "#__codelineno-10-60" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-61" name = "__codelineno-10-61" href = "#__codelineno-10-61" > < / 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-10-62" name = "__codelineno-10-62" href = "#__codelineno-10-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-63" name = "__codelineno-10-63" href = "#__codelineno-10-63" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_queue.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-11-1" name = "__codelineno-11-1" href = "#__codelineno-11-1" > < / a > < span class = "cm" > /* 基于链表实现的队列 */< / span >
< a id = "__codelineno-11-2" name = "__codelineno-11-2" href = "#__codelineno-11-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > LinkedListQueue< / 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 = "k" > private< / span > < span class = "o" > :< / 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 = "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" > // 头结点 front ，尾结点 rear < / span >
< a id = "__codelineno-11-5" name = "__codelineno-11-5" href = "#__codelineno-11-5" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "p" > ;< / 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 = "k" > public< / span > < span class = "o" > :< / span >
< a id = "__codelineno-11-8" name = "__codelineno-11-8" href = "#__codelineno-11-8" > < / a > < span class = "w" > < / span > < span class = "n" > LinkedListQueue< / span > < span class = "p" > ()< / span > < span class = "w" > < / 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" > front< / 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-11-10" name = "__codelineno-11-10" href = "#__codelineno-11-10" > < / 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" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-11" name = "__codelineno-11-11" href = "#__codelineno-11-11" > < / a > < 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-11-12" name = "__codelineno-11-12" href = "#__codelineno-11-12" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-13" name = "__codelineno-11-13" href = "#__codelineno-11-13" > < / a >
< a id = "__codelineno-11-14" name = "__codelineno-11-14" href = "#__codelineno-11-14" > < / a > < span class = "w" > < / span > < span class = "o" > ~< / span > < span class = "n" > LinkedListQueue< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-03-16 18:20:59 +08:00
< a id = "__codelineno-11-15" name = "__codelineno-11-15" href = "#__codelineno-11-15" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历链表删除结点，释放内存< / span >
< a id = "__codelineno-11-16" name = "__codelineno-11-16" href = "#__codelineno-11-16" > < / a > < span class = "w" > < / span > < span class = "n" > freeMemoryLinkedList< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "p" > );< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-11-17" name = "__codelineno-11-17" href = "#__codelineno-11-17" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-18" name = "__codelineno-11-18" href = "#__codelineno-11-18" > < / a >
< a id = "__codelineno-11-19" name = "__codelineno-11-19" href = "#__codelineno-11-19" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-11-20" name = "__codelineno-11-20" href = "#__codelineno-11-20" > < / 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-11-21" name = "__codelineno-11-21" href = "#__codelineno-11-21" > < / 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-11-22" name = "__codelineno-11-22" href = "#__codelineno-11-22" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-23" name = "__codelineno-11-23" href = "#__codelineno-11-23" > < / a >
< a id = "__codelineno-11-24" name = "__codelineno-11-24" href = "#__codelineno-11-24" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-11-25" name = "__codelineno-11-25" href = "#__codelineno-11-25" > < / a > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > empty< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-26" name = "__codelineno-11-26" href = "#__codelineno-11-26" > < / 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-11-27" name = "__codelineno-11-27" href = "#__codelineno-11-27" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-28" name = "__codelineno-11-28" href = "#__codelineno-11-28" > < / a >
< a id = "__codelineno-11-29" name = "__codelineno-11-29" href = "#__codelineno-11-29" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-11-30" name = "__codelineno-11-30" href = "#__codelineno-11-30" > < / 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 = "p" > {< / span >
< a id = "__codelineno-11-31" name = "__codelineno-11-31" href = "#__codelineno-11-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 尾结点后添加 num< / span >
< a id = "__codelineno-11-32" name = "__codelineno-11-32" href = "#__codelineno-11-32" > < / 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 = "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-11-33" name = "__codelineno-11-33" href = "#__codelineno-11-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-11-34" name = "__codelineno-11-34" href = "#__codelineno-11-34" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / 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" > nullptr< / span > < span class = "p" > )< / span > < span class = "w" > < / 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 = "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-11-36" name = "__codelineno-11-36" href = "#__codelineno-11-36" > < / 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-11-37" name = "__codelineno-11-37" href = "#__codelineno-11-37" > < / a > < span class = "w" > < / 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" > // 如果队列不为空，则将该结点添加到尾结点后< / 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 = "p" > {< / span >
< a id = "__codelineno-11-40" name = "__codelineno-11-40" href = "#__codelineno-11-40" > < / 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-11-41" name = "__codelineno-11-41" href = "#__codelineno-11-41" > < / 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-11-42" name = "__codelineno-11-42" href = "#__codelineno-11-42" > < / a > < span class = "w" > < / 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" > queSize< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-44" name = "__codelineno-11-44" href = "#__codelineno-11-44" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-45" name = "__codelineno-11-45" href = "#__codelineno-11-45" > < / a >
< a id = "__codelineno-11-46" name = "__codelineno-11-46" href = "#__codelineno-11-46" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-11-47" name = "__codelineno-11-47" href = "#__codelineno-11-47" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-11-48" name = "__codelineno-11-48" href = "#__codelineno-11-48" > < / 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" > peek< / 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 = "c1" > // 删除头结点< / span >
< a id = "__codelineno-11-50" name = "__codelineno-11-50" href = "#__codelineno-11-50" > < / a > < span class = "w" > < / span > < span class = "n" > ListNode< / 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" > front< / 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" > front< / 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-11-52" name = "__codelineno-11-52" href = "#__codelineno-11-52" > < / a > < span class = "w" > < / span > < span class = "c1" > // 释放内存< / span >
< a id = "__codelineno-11-53" name = "__codelineno-11-53" href = "#__codelineno-11-53" > < / a > < span class = "w" > < / span > < span class = "k" > delete< / span > < span class = "w" > < / span > < span class = "n" > tmp< / span > < span class = "p" > ;< / span > < span class = "w" > < / span >
< a id = "__codelineno-11-54" name = "__codelineno-11-54" href = "#__codelineno-11-54" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-55" name = "__codelineno-11-55" href = "#__codelineno-11-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-56" name = "__codelineno-11-56" href = "#__codelineno-11-56" > < / a >
< a id = "__codelineno-11-57" name = "__codelineno-11-57" href = "#__codelineno-11-57" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-11-58" name = "__codelineno-11-58" href = "#__codelineno-11-58" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peek< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-59" name = "__codelineno-11-59" href = "#__codelineno-11-59" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / 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-11-60" name = "__codelineno-11-60" href = "#__codelineno-11-60" > < / 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" > " 队列为空" < / 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 = "k" > return< / 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-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 >
< a id = "__codelineno-11-64" name = "__codelineno-11-64" href = "#__codelineno-11-64" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 将链表转化为 Vector 并返回 */< / span >
< a id = "__codelineno-11-65" name = "__codelineno-11-65" href = "#__codelineno-11-65" > < / 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-11-66" name = "__codelineno-11-66" href = "#__codelineno-11-66" > < / 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-11-67" name = "__codelineno-11-67" href = "#__codelineno-11-67" > < / 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-11-68" name = "__codelineno-11-68" href = "#__codelineno-11-68" > < / 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-11-69" name = "__codelineno-11-69" href = "#__codelineno-11-69" > < / 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-11-70" name = "__codelineno-11-70" href = "#__codelineno-11-70" > < / 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-11-71" name = "__codelineno-11-71" href = "#__codelineno-11-71" > < / a > < 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-73" name = "__codelineno-11-73" href = "#__codelineno-11-73" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-74" name = "__codelineno-11-74" href = "#__codelineno-11-74" > < / a > < span class = "p" > };< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-03-03 02:46:43 +08:00
< div class = "highlight" > < span class = "filename" > linkedlist_queue.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-12-1" name = "__codelineno-12-1" href = "#__codelineno-12-1" > < / a > < span class = "k" > class< / span > < span class = "nc" > LinkedListQueue< / span > < span class = "p" > :< / span >
< a id = "__codelineno-12-2" name = "__codelineno-12-2" href = "#__codelineno-12-2" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 基于链表实现的队列 " " " < / span >
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< a id = "__codelineno-12-3" name = "__codelineno-12-3" href = "#__codelineno-12-3" > < / a > < span class = "k" > def< / span > < span class = "fm" > __init__< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-12-4" name = "__codelineno-12-4" href = "#__codelineno-12-4" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 构造方法 " " " < / span >
2023-03-23 18:57:04 +08:00
< a id = "__codelineno-12-5" name = "__codelineno-12-5" href = "#__codelineno-12-5" > < / 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" > # 头结点 front< / span >
< a id = "__codelineno-12-6" name = "__codelineno-12-6" href = "#__codelineno-12-6" > < / 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" > # 尾结点 rear< / span >
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< a id = "__codelineno-12-7" name = "__codelineno-12-7" href = "#__codelineno-12-7" > < / 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 >
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< a id = "__codelineno-12-8" name = "__codelineno-12-8" href = "#__codelineno-12-8" > < / a >
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< a id = "__codelineno-12-9" name = "__codelineno-12-9" href = "#__codelineno-12-9" > < / 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 >
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< a id = "__codelineno-12-10" name = "__codelineno-12-10" href = "#__codelineno-12-10" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 获取队列的长度 " " " < / span >
< a id = "__codelineno-12-11" name = "__codelineno-12-11" href = "#__codelineno-12-11" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span >
< a id = "__codelineno-12-12" name = "__codelineno-12-12" href = "#__codelineno-12-12" > < / a >
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< a id = "__codelineno-12-13" name = "__codelineno-12-13" href = "#__codelineno-12-13" > < / 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 >
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< a id = "__codelineno-12-14" name = "__codelineno-12-14" href = "#__codelineno-12-14" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 判断队列是否为空 " " " < / span >
< a id = "__codelineno-12-15" name = "__codelineno-12-15" href = "#__codelineno-12-15" > < / a > < span class = "k" > return< / span > < span class = "ow" > not< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span >
< a id = "__codelineno-12-16" name = "__codelineno-12-16" href = "#__codelineno-12-16" > < / a >
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< a id = "__codelineno-12-17" name = "__codelineno-12-17" href = "#__codelineno-12-17" > < / 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 = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-12-18" name = "__codelineno-12-18" href = "#__codelineno-12-18" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 入队 " " " < / span >
< a id = "__codelineno-12-19" name = "__codelineno-12-19" href = "#__codelineno-12-19" > < / a > < span class = "c1" > # 尾结点后添加 num< / span >
< a id = "__codelineno-12-20" name = "__codelineno-12-20" href = "#__codelineno-12-20" > < / 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-12-21" name = "__codelineno-12-21" href = "#__codelineno-12-21" > < / a > < span class = "c1" > # 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-12-22" name = "__codelineno-12-22" href = "#__codelineno-12-22" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "ow" > is< / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-12-23" name = "__codelineno-12-23" href = "#__codelineno-12-23" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-12-24" name = "__codelineno-12-24" href = "#__codelineno-12-24" > < / a > < 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-12-25" name = "__codelineno-12-25" href = "#__codelineno-12-25" > < / a > < span class = "c1" > # 如果队列不为空，则将该结点添加到尾结点后< / span >
< a id = "__codelineno-12-26" name = "__codelineno-12-26" href = "#__codelineno-12-26" > < / a > < span class = "k" > else< / span > < span class = "p" > :< / span >
< a id = "__codelineno-12-27" name = "__codelineno-12-27" href = "#__codelineno-12-27" > < / 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-12-28" name = "__codelineno-12-28" href = "#__codelineno-12-28" > < / a > < 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-12-29" name = "__codelineno-12-29" href = "#__codelineno-12-29" > < / 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-12-30" name = "__codelineno-12-30" href = "#__codelineno-12-30" > < / a >
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< a id = "__codelineno-12-31" name = "__codelineno-12-31" href = "#__codelineno-12-31" > < / 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 = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
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< a id = "__codelineno-12-32" name = "__codelineno-12-32" href = "#__codelineno-12-32" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 出队 " " " < / span >
< a id = "__codelineno-12-33" name = "__codelineno-12-33" href = "#__codelineno-12-33" > < / a > < span class = "n" > num< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > peek< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-12-34" name = "__codelineno-12-34" href = "#__codelineno-12-34" > < / a > < span class = "c1" > # 删除头结点< / span >
< a id = "__codelineno-12-35" name = "__codelineno-12-35" href = "#__codelineno-12-35" > < / 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" > __front< / span > < span class = "o" > .< / span > < span class = "n" > next< / span >
< a id = "__codelineno-12-36" name = "__codelineno-12-36" href = "#__codelineno-12-36" > < / 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-12-37" name = "__codelineno-12-37" href = "#__codelineno-12-37" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-12-38" name = "__codelineno-12-38" href = "#__codelineno-12-38" > < / a >
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< a id = "__codelineno-12-39" name = "__codelineno-12-39" href = "#__codelineno-12-39" > < / a > < span class = "k" > def< / span > < span class = "nf" > peek< / 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 >
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< a id = "__codelineno-12-40" name = "__codelineno-12-40" href = "#__codelineno-12-40" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 访问队首元素 " " " < / span >
< a id = "__codelineno-12-41" name = "__codelineno-12-41" href = "#__codelineno-12-41" > < / a > < span class = "k" > if< / 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 > < span class = "p" > :< / span >
< a id = "__codelineno-12-42" name = "__codelineno-12-42" href = "#__codelineno-12-42" > < / a > < span class = "nb" > print< / span > < span class = "p" > (< / span > < span class = "s2" > " 队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-12-43" name = "__codelineno-12-43" href = "#__codelineno-12-43" > < / a > < span class = "k" > return< / span > < span class = "kc" > False< / span >
< a id = "__codelineno-12-44" name = "__codelineno-12-44" href = "#__codelineno-12-44" > < / a > < span class = "k" > return< / 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-12-45" name = "__codelineno-12-45" href = "#__codelineno-12-45" > < / a >
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< a id = "__codelineno-12-46" name = "__codelineno-12-46" href = "#__codelineno-12-46" > < / a > < span class = "k" > def< / span > < span class = "nf" > to_list< / 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 >
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< a id = "__codelineno-12-47" name = "__codelineno-12-47" href = "#__codelineno-12-47" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 转化为列表用于打印 " " " < / span >
< a id = "__codelineno-12-48" name = "__codelineno-12-48" href = "#__codelineno-12-48" > < / a > < span class = "n" > queue< / span > < span class = "o" > =< / span > < span class = "p" > []< / span >
< a id = "__codelineno-12-49" name = "__codelineno-12-49" href = "#__codelineno-12-49" > < / a > < span class = "n" > temp< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span >
< a id = "__codelineno-12-50" name = "__codelineno-12-50" href = "#__codelineno-12-50" > < / a > < span class = "k" > while< / span > < span class = "n" > temp< / span > < span class = "p" > :< / span >
< a id = "__codelineno-12-51" name = "__codelineno-12-51" href = "#__codelineno-12-51" > < / a > < span class = "n" > queue< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "n" > temp< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-12-52" name = "__codelineno-12-52" href = "#__codelineno-12-52" > < / a > < span class = "n" > temp< / span > < span class = "o" > =< / span > < span class = "n" > temp< / span > < span class = "o" > .< / span > < span class = "n" > next< / span >
< a id = "__codelineno-12-53" name = "__codelineno-12-53" href = "#__codelineno-12-53" > < / a > < span class = "k" > return< / span > < span class = "n" > queue< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_queue.go< / span > < pre > < span > < / span > < code > < a id = "__codelineno-13-1" name = "__codelineno-13-1" href = "#__codelineno-13-1" > < / a > < span class = "cm" > /* 基于链表实现的队列 */< / span >
< a id = "__codelineno-13-2" name = "__codelineno-13-2" href = "#__codelineno-13-2" > < / a > < span class = "kd" > type< / span > < span class = "w" > < / span > < span class = "nx" > linkedListQueue< / span > < span class = "w" > < / span > < span class = "kd" > struct< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-13-3" name = "__codelineno-13-3" href = "#__codelineno-13-3" > < / a > < span class = "w" > < / span > < span class = "c1" > // 使用内置包 list 来实现队列< / span >
< a id = "__codelineno-13-4" name = "__codelineno-13-4" href = "#__codelineno-13-4" > < / 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-13-5" name = "__codelineno-13-5" href = "#__codelineno-13-5" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-13-6" name = "__codelineno-13-6" href = "#__codelineno-13-6" > < / a >
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< a id = "__codelineno-13-7" name = "__codelineno-13-7" href = "#__codelineno-13-7" > < / a > < span class = "cm" > /* 初始化队列 */< / span >
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< a id = "__codelineno-13-8" name = "__codelineno-13-8" href = "#__codelineno-13-8" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "nx" > newLinkedListQueue< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > linkedListQueue< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-13-9" name = "__codelineno-13-9" href = "#__codelineno-13-9" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "nx" > linkedListQueue< / span > < span class = "p" > {< / span >
< a id = "__codelineno-13-10" name = "__codelineno-13-10" href = "#__codelineno-13-10" > < / 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 >
< a id = "__codelineno-13-11" name = "__codelineno-13-11" href = "#__codelineno-13-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-13-12" name = "__codelineno-13-12" href = "#__codelineno-13-12" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-13-13" name = "__codelineno-13-13" href = "#__codelineno-13-13" > < / a >
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< a id = "__codelineno-13-14" name = "__codelineno-13-14" href = "#__codelineno-13-14" > < / a > < span class = "cm" > /* 入队 */< / span >
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< a id = "__codelineno-13-15" name = "__codelineno-13-15" href = "#__codelineno-13-15" > < / 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" > linkedListQueue< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > push< / 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-13-16" name = "__codelineno-13-16" href = "#__codelineno-13-16" > < / 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" > PushBack< / span > < span class = "p" > (< / span > < span class = "nx" > value< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-17" name = "__codelineno-13-17" href = "#__codelineno-13-17" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-13-18" name = "__codelineno-13-18" href = "#__codelineno-13-18" > < / a >
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< a id = "__codelineno-13-19" name = "__codelineno-13-19" href = "#__codelineno-13-19" > < / a > < span class = "cm" > /* 出队 */< / span >
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< a id = "__codelineno-13-20" name = "__codelineno-13-20" href = "#__codelineno-13-20" > < / 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" > linkedListQueue< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
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< a id = "__codelineno-13-21" name = "__codelineno-13-21" href = "#__codelineno-13-21" > < / 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-13-22" name = "__codelineno-13-22" href = "#__codelineno-13-22" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-13-23" name = "__codelineno-13-23" href = "#__codelineno-13-23" > < / a > < span class = "w" > < / 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 = "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-13-25" name = "__codelineno-13-25" href = "#__codelineno-13-25" > < / 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-13-26" name = "__codelineno-13-26" href = "#__codelineno-13-26" > < / 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-13-27" name = "__codelineno-13-27" href = "#__codelineno-13-27" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-13-28" name = "__codelineno-13-28" href = "#__codelineno-13-28" > < / a >
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< a id = "__codelineno-13-29" name = "__codelineno-13-29" href = "#__codelineno-13-29" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
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< a id = "__codelineno-13-30" name = "__codelineno-13-30" href = "#__codelineno-13-30" > < / 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" > linkedListQueue< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > peek< / 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-13-31" name = "__codelineno-13-31" href = "#__codelineno-13-31" > < / 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-13-32" name = "__codelineno-13-32" href = "#__codelineno-13-32" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-13-33" name = "__codelineno-13-33" href = "#__codelineno-13-33" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-13-34" name = "__codelineno-13-34" href = "#__codelineno-13-34" > < / 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-13-35" name = "__codelineno-13-35" href = "#__codelineno-13-35" > < / 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-13-36" name = "__codelineno-13-36" href = "#__codelineno-13-36" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-13-37" name = "__codelineno-13-37" href = "#__codelineno-13-37" > < / a >
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< a id = "__codelineno-13-38" name = "__codelineno-13-38" href = "#__codelineno-13-38" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
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< a id = "__codelineno-13-39" name = "__codelineno-13-39" href = "#__codelineno-13-39" > < / 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" > linkedListQueue< / 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-13-40" name = "__codelineno-13-40" href = "#__codelineno-13-40" > < / 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-13-41" name = "__codelineno-13-41" href = "#__codelineno-13-41" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-13-42" name = "__codelineno-13-42" href = "#__codelineno-13-42" > < / a >
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< a id = "__codelineno-13-43" name = "__codelineno-13-43" href = "#__codelineno-13-43" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
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< a id = "__codelineno-13-44" name = "__codelineno-13-44" href = "#__codelineno-13-44" > < / 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" > linkedListQueue< / 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-13-45" name = "__codelineno-13-45" href = "#__codelineno-13-45" > < / 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-13-46" name = "__codelineno-13-46" href = "#__codelineno-13-46" > < / a > < span class = "p" > }< / span >
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< a id = "__codelineno-13-47" name = "__codelineno-13-47" href = "#__codelineno-13-47" > < / a >
< a id = "__codelineno-13-48" name = "__codelineno-13-48" href = "#__codelineno-13-48" > < / a > < span class = "cm" > /* 获取 List 用于打印 */< / span >
< a id = "__codelineno-13-49" name = "__codelineno-13-49" href = "#__codelineno-13-49" > < / 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" > linkedListQueue< / 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-13-50" name = "__codelineno-13-50" href = "#__codelineno-13-50" > < / 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-13-51" name = "__codelineno-13-51" href = "#__codelineno-13-51" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_queue.js< / span > < pre > < span > < / span > < code > < a id = "__codelineno-14-1" name = "__codelineno-14-1" href = "#__codelineno-14-1" > < / a > < span class = "cm" > /* 基于链表实现的队列 */< / span >
< a id = "__codelineno-14-2" name = "__codelineno-14-2" href = "#__codelineno-14-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > LinkedListQueue< / 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 = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 头结点 #front< / span >
< a id = "__codelineno-14-4" name = "__codelineno-14-4" href = "#__codelineno-14-4" > < / 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" > // 尾结点 #rear< / span >
< a id = "__codelineno-14-5" name = "__codelineno-14-5" href = "#__codelineno-14-5" > < / a > < span class = "w" > < / 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-14-6" name = "__codelineno-14-6" href = "#__codelineno-14-6" > < / a >
< a id = "__codelineno-14-7" name = "__codelineno-14-7" href = "#__codelineno-14-7" > < / 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-14-8" name = "__codelineno-14-8" href = "#__codelineno-14-8" > < / 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-14-9" name = "__codelineno-14-9" href = "#__codelineno-14-9" > < / 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-14-10" name = "__codelineno-14-10" href = "#__codelineno-14-10" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-11" name = "__codelineno-14-11" href = "#__codelineno-14-11" > < / a >
< a id = "__codelineno-14-12" name = "__codelineno-14-12" href = "#__codelineno-14-12" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-14-13" name = "__codelineno-14-13" href = "#__codelineno-14-13" > < / a > < span class = "w" > < / span > < span class = "nx" > get< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-14" name = "__codelineno-14-14" href = "#__codelineno-14-14" > < / 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-14-15" name = "__codelineno-14-15" href = "#__codelineno-14-15" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-16" name = "__codelineno-14-16" href = "#__codelineno-14-16" > < / a >
< a id = "__codelineno-14-17" name = "__codelineno-14-17" href = "#__codelineno-14-17" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-14-18" name = "__codelineno-14-18" href = "#__codelineno-14-18" > < / 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-14-19" name = "__codelineno-14-19" href = "#__codelineno-14-19" > < / 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" > 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-14-20" name = "__codelineno-14-20" href = "#__codelineno-14-20" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-21" name = "__codelineno-14-21" href = "#__codelineno-14-21" > < / a >
< a id = "__codelineno-14-22" name = "__codelineno-14-22" href = "#__codelineno-14-22" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-14-23" name = "__codelineno-14-23" href = "#__codelineno-14-23" > < / a > < span class = "w" > < / span > < span class = "nx" > push< / 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-14-24" name = "__codelineno-14-24" href = "#__codelineno-14-24" > < / a > < span class = "w" > < / span > < span class = "c1" > // 尾结点后添加 num< / span >
< a id = "__codelineno-14-25" name = "__codelineno-14-25" href = "#__codelineno-14-25" > < / 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" > num< / 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 = "c1" > // 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-14-27" name = "__codelineno-14-27" href = "#__codelineno-14-27" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "o" > !< / 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 = "p" > {< / span >
< a id = "__codelineno-14-28" name = "__codelineno-14-28" href = "#__codelineno-14-28" > < / 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 >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-14-29" name = "__codelineno-14-29" href = "#__codelineno-14-29" > < / 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 >
2023-02-08 16:47:58 +08:00
< a id = "__codelineno-14-30" name = "__codelineno-14-30" href = "#__codelineno-14-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列不为空，则将该结点添加到尾结点后< / span >
< a id = "__codelineno-14-31" name = "__codelineno-14-31" href = "#__codelineno-14-31" > < / 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-14-32" name = "__codelineno-14-32" href = "#__codelineno-14-32" > < / 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 = "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-14-33" name = "__codelineno-14-33" href = "#__codelineno-14-33" > < / 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 >
< a id = "__codelineno-14-34" name = "__codelineno-14-34" href = "#__codelineno-14-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-35" name = "__codelineno-14-35" href = "#__codelineno-14-35" > < / 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-14-36" name = "__codelineno-14-36" href = "#__codelineno-14-36" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-37" name = "__codelineno-14-37" href = "#__codelineno-14-37" > < / a >
< a id = "__codelineno-14-38" name = "__codelineno-14-38" href = "#__codelineno-14-38" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-14-39" name = "__codelineno-14-39" href = "#__codelineno-14-39" > < / a > < span class = "w" > < / span > < span class = "nx" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 16:47:58 +08:00
< a id = "__codelineno-14-40" name = "__codelineno-14-40" href = "#__codelineno-14-40" > < / 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" > peek< / 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 = "c1" > // 删除头结点< / span >
< a id = "__codelineno-14-42" name = "__codelineno-14-42" href = "#__codelineno-14-42" > < / 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 = "err" > #< / span > < span class = "nx" > front< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-14-43" name = "__codelineno-14-43" href = "#__codelineno-14-43" > < / 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-14-44" name = "__codelineno-14-44" href = "#__codelineno-14-44" > < / 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-14-45" name = "__codelineno-14-45" href = "#__codelineno-14-45" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-46" name = "__codelineno-14-46" href = "#__codelineno-14-46" > < / a >
< a id = "__codelineno-14-47" name = "__codelineno-14-47" href = "#__codelineno-14-47" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-14-48" name = "__codelineno-14-48" href = "#__codelineno-14-48" > < / a > < span class = "w" > < / span > < span class = "nx" > peek< / span > < span class = "p" > ()< / span > < 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 = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / 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-14-50" name = "__codelineno-14-50" href = "#__codelineno-14-50" > < / a > < 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 = "s2" > " 队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-14-51" name = "__codelineno-14-51" href = "#__codelineno-14-51" > < / 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" > front< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-14-52" name = "__codelineno-14-52" href = "#__codelineno-14-52" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-53" name = "__codelineno-14-53" href = "#__codelineno-14-53" > < / a >
< a id = "__codelineno-14-54" name = "__codelineno-14-54" href = "#__codelineno-14-54" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 将链表转化为 Array 并返回 */< / span >
< a id = "__codelineno-14-55" name = "__codelineno-14-55" href = "#__codelineno-14-55" > < / 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-14-56" name = "__codelineno-14-56" href = "#__codelineno-14-56" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > node< / 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-14-57" name = "__codelineno-14-57" href = "#__codelineno-14-57" > < / 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 = "ow" > new< / span > < span class = "w" > < / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > size< / 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 = "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" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > .< / span > < span class = "nx" > length< / 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 = "p" > {< / span >
< a id = "__codelineno-14-59" name = "__codelineno-14-59" href = "#__codelineno-14-59" > < / 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 = "nx" > node< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-14-60" name = "__codelineno-14-60" href = "#__codelineno-14-60" > < / a > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-14-61" name = "__codelineno-14-61" href = "#__codelineno-14-61" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-62" name = "__codelineno-14-62" href = "#__codelineno-14-62" > < / 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-14-63" name = "__codelineno-14-63" href = "#__codelineno-14-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-64" name = "__codelineno-14-64" href = "#__codelineno-14-64" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_queue.ts< / span > < pre > < span > < / span > < code > < a id = "__codelineno-15-1" name = "__codelineno-15-1" href = "#__codelineno-15-1" > < / a > < span class = "cm" > /* 基于链表实现的队列 */< / span >
< 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" > LinkedListQueue< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-15-3" name = "__codelineno-15-3" href = "#__codelineno-15-3" > < / 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 = "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" > // 头结点 front< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-15-4" name = "__codelineno-15-4" href = "#__codelineno-15-4" > < / 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 = "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" > // 尾结点 rear< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-5" name = "__codelineno-15-5" href = "#__codelineno-15-5" > < / 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 = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 0< / span > < span class = "p" > ;< / span >
2023-02-08 16:47:58 +08:00
< a id = "__codelineno-15-6" name = "__codelineno-15-6" href = "#__codelineno-15-6" > < / a >
< 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 = "w" > < / span > < span class = "p" > {< / span >
< 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" > 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-15-9" 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" > 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-15-10" name = "__codelineno-15-10" href = "#__codelineno-15-10" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-11" name = "__codelineno-15-11" href = "#__codelineno-15-11" > < / a >
< a id = "__codelineno-15-12" name = "__codelineno-15-12" href = "#__codelineno-15-12" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-15-13" name = "__codelineno-15-13" href = "#__codelineno-15-13" > < / a > < span class = "w" > < / span > < span class = "nx" > get< / span > < 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-15-14" name = "__codelineno-15-14" href = "#__codelineno-15-14" > < / 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-15-15" name = "__codelineno-15-15" href = "#__codelineno-15-15" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-16" name = "__codelineno-15-16" href = "#__codelineno-15-16" > < / a >
< a id = "__codelineno-15-17" name = "__codelineno-15-17" href = "#__codelineno-15-17" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-15-18" name = "__codelineno-15-18" href = "#__codelineno-15-18" > < / 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-15-19" name = "__codelineno-15-19" href = "#__codelineno-15-19" > < / 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" > 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-15-20" name = "__codelineno-15-20" href = "#__codelineno-15-20" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-21" name = "__codelineno-15-21" href = "#__codelineno-15-21" > < / a >
< a id = "__codelineno-15-22" name = "__codelineno-15-22" href = "#__codelineno-15-22" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-15-23" name = "__codelineno-15-23" href = "#__codelineno-15-23" > < / a > < span class = "w" > < / span > < span class = "nx" > push< / 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-15-24" name = "__codelineno-15-24" href = "#__codelineno-15-24" > < / a > < span class = "w" > < / span > < span class = "c1" > // 尾结点后添加 num< / span >
< a id = "__codelineno-15-25" name = "__codelineno-15-25" href = "#__codelineno-15-25" > < / 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" > num< / span > < span class = "p" > );< / span >
< a id = "__codelineno-15-26" name = "__codelineno-15-26" href = "#__codelineno-15-26" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-15-27" name = "__codelineno-15-27" href = "#__codelineno-15-27" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "o" > !< / 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 = "p" > {< / span >
< a id = "__codelineno-15-28" name = "__codelineno-15-28" href = "#__codelineno-15-28" > < / 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 >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-15-29" name = "__codelineno-15-29" href = "#__codelineno-15-29" > < / 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 >
2023-02-08 16:47:58 +08:00
< a id = "__codelineno-15-30" name = "__codelineno-15-30" href = "#__codelineno-15-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列不为空，则将该结点添加到尾结点后< / span >
< a id = "__codelineno-15-31" name = "__codelineno-15-31" href = "#__codelineno-15-31" > < / 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-15-32" name = "__codelineno-15-32" href = "#__codelineno-15-32" > < / a > < span class = "w" > < / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > rear< / span > < span class = "o" > !< / 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-15-33" name = "__codelineno-15-33" href = "#__codelineno-15-33" > < / 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-15-34" name = "__codelineno-15-34" href = "#__codelineno-15-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< 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 = "nx" > queSize< / span > < span class = "o" > ++< / 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 = "p" > }< / span >
< a id = "__codelineno-15-37" name = "__codelineno-15-37" href = "#__codelineno-15-37" > < / a >
< a id = "__codelineno-15-38" name = "__codelineno-15-38" href = "#__codelineno-15-38" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-15-39" name = "__codelineno-15-39" href = "#__codelineno-15-39" > < / a > < span class = "w" > < / span > < span class = "nx" > pop< / 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 >
2023-02-08 16:47:58 +08:00
< a id = "__codelineno-15-40" name = "__codelineno-15-40" href = "#__codelineno-15-40" > < / 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" > peek< / span > < span class = "p" > ();< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-15-41" name = "__codelineno-15-41" href = "#__codelineno-15-41" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "o" > !< / 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 = "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" > ' 队列为空' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-15-42" name = "__codelineno-15-42" href = "#__codelineno-15-42" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头结点< / span >
< a id = "__codelineno-15-43" name = "__codelineno-15-43" href = "#__codelineno-15-43" > < / 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" > front< / span > < span class = "p" > .< / span > < span class = "nx" > next< / 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 = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-45" name = "__codelineno-15-45" href = "#__codelineno-15-45" > < / 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-15-46" name = "__codelineno-15-46" href = "#__codelineno-15-46" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-47" name = "__codelineno-15-47" href = "#__codelineno-15-47" > < / a >
< a id = "__codelineno-15-48" name = "__codelineno-15-48" href = "#__codelineno-15-48" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-15-49" name = "__codelineno-15-49" href = "#__codelineno-15-49" > < / a > < span class = "w" > < / span > < span class = "nx" > peek< / 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-15-50" name = "__codelineno-15-50" href = "#__codelineno-15-50" > < / 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" > size< / 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 = "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" > ' 队列为空' < / span > < span class = "p" > );< / span >
< a id = "__codelineno-15-51" name = "__codelineno-15-51" href = "#__codelineno-15-51" > < / 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" > front< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "nx" > val< / 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 = "p" > }< / span >
< a id = "__codelineno-15-53" name = "__codelineno-15-53" href = "#__codelineno-15-53" > < / a >
< a id = "__codelineno-15-54" name = "__codelineno-15-54" href = "#__codelineno-15-54" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 将链表转化为 Array 并返回 */< / span >
< a id = "__codelineno-15-55" name = "__codelineno-15-55" href = "#__codelineno-15-55" > < / 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-15-56" name = "__codelineno-15-56" href = "#__codelineno-15-56" > < / a > < span class = "w" > < / span > < span class = "kd" > let< / span > < span class = "w" > < / span > < span class = "nx" > node< / 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-15-57" name = "__codelineno-15-57" href = "#__codelineno-15-57" > < / 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 = "ow" > new< / span > < span class = "w" > < / span > < span class = "nb" > Array< / span > < span class = "o" > < < / span > < span class = "kt" > number< / span > < span class = "o" > > < / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "p" > );< / span >
< a id = "__codelineno-15-58" name = "__codelineno-15-58" href = "#__codelineno-15-58" > < / 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" > i< / span > < span class = "w" > < / span > < span class = "o" > < < / span > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > .< / span > < span class = "nx" > length< / 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 = "p" > {< / span >
< a id = "__codelineno-15-59" name = "__codelineno-15-59" href = "#__codelineno-15-59" > < / 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 = "nx" > node< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "nx" > val< / 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 = "nx" > node< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nx" > node< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "nx" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-61" name = "__codelineno-15-61" href = "#__codelineno-15-61" > < / a > < span class = "w" > < / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > res< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-15-63" name = "__codelineno-15-63" href = "#__codelineno-15-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-15-64" name = "__codelineno-15-64" href = "#__codelineno-15-64" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-02-11 18:21:51 +08:00
< div class = "highlight" > < span class = "filename" > linkedlist_queue.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-16-1" name = "__codelineno-16-1" href = "#__codelineno-16-1" > < / a > < span class = "p" > [< / span > < span class = "n" > class< / span > < span class = "p" > ]{< / span > < span class = "n" > linkedListQueue< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "n" > func< / span > < span class = "p" > ]{}< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_queue.cs< / span > < pre > < span > < / span > < code > < a id = "__codelineno-17-1" name = "__codelineno-17-1" href = "#__codelineno-17-1" > < / a > < span class = "cm" > /* 基于链表实现的队列 */< / span >
< a id = "__codelineno-17-2" name = "__codelineno-17-2" href = "#__codelineno-17-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > LinkedListQueue< / span >
< a id = "__codelineno-17-3" name = "__codelineno-17-3" href = "#__codelineno-17-3" > < / a > < span class = "p" > {< / span >
< a id = "__codelineno-17-4" name = "__codelineno-17-4" href = "#__codelineno-17-4" > < / 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" > // 头结点 front ，尾结点 rear < / span >
< a id = "__codelineno-17-5" name = "__codelineno-17-5" href = "#__codelineno-17-5" > < / 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 = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
2023-02-08 22:16:28 +08:00
< a id = "__codelineno-17-6" name = "__codelineno-17-6" href = "#__codelineno-17-6" > < / a >
< a id = "__codelineno-17-7" name = "__codelineno-17-7" href = "#__codelineno-17-7" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "nf" > LinkedListQueue< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-17-8" name = "__codelineno-17-8" href = "#__codelineno-17-8" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-9" name = "__codelineno-17-9" href = "#__codelineno-17-9" > < / 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-17-10" name = "__codelineno-17-10" href = "#__codelineno-17-10" > < / 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-17-11" name = "__codelineno-17-11" href = "#__codelineno-17-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-12" name = "__codelineno-17-12" href = "#__codelineno-17-12" > < / a >
< a id = "__codelineno-17-13" name = "__codelineno-17-13" href = "#__codelineno-17-13" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-17-14" name = "__codelineno-17-14" href = "#__codelineno-17-14" > < / 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" > size< / 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 = "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" > queSize< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-17" name = "__codelineno-17-17" href = "#__codelineno-17-17" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-18" name = "__codelineno-17-18" href = "#__codelineno-17-18" > < / a >
< a id = "__codelineno-17-19" name = "__codelineno-17-19" href = "#__codelineno-17-19" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-17-20" name = "__codelineno-17-20" href = "#__codelineno-17-20" > < / 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 >
< a id = "__codelineno-17-21" name = "__codelineno-17-21" href = "#__codelineno-17-21" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-22" name = "__codelineno-17-22" href = "#__codelineno-17-22" > < / 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-17-23" name = "__codelineno-17-23" href = "#__codelineno-17-23" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-24" name = "__codelineno-17-24" href = "#__codelineno-17-24" > < / a >
< a id = "__codelineno-17-25" name = "__codelineno-17-25" href = "#__codelineno-17-25" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-17-26" name = "__codelineno-17-26" href = "#__codelineno-17-26" > < / 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" > push< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span >
< a id = "__codelineno-17-27" name = "__codelineno-17-27" href = "#__codelineno-17-27" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-28" name = "__codelineno-17-28" href = "#__codelineno-17-28" > < / a > < span class = "w" > < / span > < span class = "c1" > // 尾结点后添加 num< / span >
< a id = "__codelineno-17-29" name = "__codelineno-17-29" href = "#__codelineno-17-29" > < / 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-17-30" name = "__codelineno-17-30" href = "#__codelineno-17-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-17-31" name = "__codelineno-17-31" href = "#__codelineno-17-31" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / 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" > null< / span > < span class = "p" > )< / span >
< a id = "__codelineno-17-32" name = "__codelineno-17-32" href = "#__codelineno-17-32" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-33" name = "__codelineno-17-33" href = "#__codelineno-17-33" > < / 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-17-34" name = "__codelineno-17-34" href = "#__codelineno-17-34" > < / 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-17-35" name = "__codelineno-17-35" href = "#__codelineno-17-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列不为空，则将该结点添加到尾结点后< / span >
< a id = "__codelineno-17-36" name = "__codelineno-17-36" href = "#__codelineno-17-36" > < / a > < span class = "w" > < / 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 = "k" > else< / span > < span class = "w" > < / span > < span class = "nf" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / 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-17-38" name = "__codelineno-17-38" href = "#__codelineno-17-38" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-39" name = "__codelineno-17-39" href = "#__codelineno-17-39" > < / 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-17-40" name = "__codelineno-17-40" href = "#__codelineno-17-40" > < / 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-17-41" name = "__codelineno-17-41" href = "#__codelineno-17-41" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-42" name = "__codelineno-17-42" href = "#__codelineno-17-42" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / 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 = "p" > }< / span >
< a id = "__codelineno-17-44" name = "__codelineno-17-44" href = "#__codelineno-17-44" > < / a >
< a id = "__codelineno-17-45" name = "__codelineno-17-45" href = "#__codelineno-17-45" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-17-46" name = "__codelineno-17-46" href = "#__codelineno-17-46" > < / 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" > pop< / span > < span class = "p" > ()< / span >
2023-02-08 22:16:28 +08:00
< a id = "__codelineno-17-47" name = "__codelineno-17-47" href = "#__codelineno-17-47" > < / a > < span class = "w" > < / 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 = "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" > peek< / 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" > // 删除头结点< / span >
< a id = "__codelineno-17-50" name = "__codelineno-17-50" href = "#__codelineno-17-50" > < / 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" > front< / span > < span class = "o" > ?.< / span > < span class = "n" > next< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-51" name = "__codelineno-17-51" href = "#__codelineno-17-51" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-52" name = "__codelineno-17-52" href = "#__codelineno-17-52" > < / 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-17-53" name = "__codelineno-17-53" href = "#__codelineno-17-53" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-54" name = "__codelineno-17-54" href = "#__codelineno-17-54" > < / a >
< a id = "__codelineno-17-55" name = "__codelineno-17-55" href = "#__codelineno-17-55" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-17-56" name = "__codelineno-17-56" href = "#__codelineno-17-56" > < / 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" > peek< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-17-57" name = "__codelineno-17-57" href = "#__codelineno-17-57" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-58" name = "__codelineno-17-58" href = "#__codelineno-17-58" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / 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 = "m" > 0< / span > < span class = "w" > < / span > < span class = "o" > ||< / span > < 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-17-59" name = "__codelineno-17-59" href = "#__codelineno-17-59" > < / 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" > Exception< / 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 = "n" > front< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-17-61" name = "__codelineno-17-61" href = "#__codelineno-17-61" > < / a > < span class = "w" > < / span > < 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 = "w" > < / span > < span class = "cm" > /* 将链表转化为 Array 并返回 */< / span >
< a id = "__codelineno-17-64" name = "__codelineno-17-64" href = "#__codelineno-17-64" > < / 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 >
< a id = "__codelineno-17-65" name = "__codelineno-17-65" href = "#__codelineno-17-65" > < / a > < span class = "w" > < / 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 = "k" > if< / span > < span class = "w" > < / 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" > null< / span > < span class = "p" > )< / span >
< a id = "__codelineno-17-67" name = "__codelineno-17-67" href = "#__codelineno-17-67" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > Array< / span > < span class = "p" > .< / span > < span class = "n" > Empty< / span > < span class = "o" > < < / span > < span class = "kt" > int< / span > < span class = "o" > > < / span > < span class = "p" > ();< / span >
< a id = "__codelineno-17-68" name = "__codelineno-17-68" href = "#__codelineno-17-68" > < / a >
< a id = "__codelineno-17-69" name = "__codelineno-17-69" href = "#__codelineno-17-69" > < / 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-17-70" name = "__codelineno-17-70" href = "#__codelineno-17-70" > < / 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-17-71" name = "__codelineno-17-71" href = "#__codelineno-17-71" > < / 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 >
< a id = "__codelineno-17-72" name = "__codelineno-17-72" href = "#__codelineno-17-72" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-17-73" name = "__codelineno-17-73" href = "#__codelineno-17-73" > < / 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-17-74" name = "__codelineno-17-74" href = "#__codelineno-17-74" > < / 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-17-75" name = "__codelineno-17-75" href = "#__codelineno-17-75" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-76" name = "__codelineno-17-76" href = "#__codelineno-17-76" > < / 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-17-77" name = "__codelineno-17-77" href = "#__codelineno-17-77" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-17-78" name = "__codelineno-17-78" href = "#__codelineno-17-78" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > linkedlist_queue.swift< / span > < pre > < span > < / span > < code > < a id = "__codelineno-18-1" name = "__codelineno-18-1" href = "#__codelineno-18-1" > < / a > < span class = "cm" > /* 基于链表实现的队列 */< / span >
< a id = "__codelineno-18-2" name = "__codelineno-18-2" href = "#__codelineno-18-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > LinkedListQueue< / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-3" name = "__codelineno-18-3" href = "#__codelineno-18-3" > < / 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" > // 头结点< / span >
< a id = "__codelineno-18-4" name = "__codelineno-18-4" href = "#__codelineno-18-4" > < / 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" > // 尾结点< / span >
< a id = "__codelineno-18-5" name = "__codelineno-18-5" href = "#__codelineno-18-5" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > _size< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-18-6" name = "__codelineno-18-6" href = "#__codelineno-18-6" > < / a >
< a id = "__codelineno-18-7" name = "__codelineno-18-7" href = "#__codelineno-18-7" > < / a > < span class = "kd" > init< / span > < span class = "p" > ()< / span > < span class = "p" > {}< / span >
< a id = "__codelineno-18-8" name = "__codelineno-18-8" href = "#__codelineno-18-8" > < / a >
< a id = "__codelineno-18-9" name = "__codelineno-18-9" href = "#__codelineno-18-9" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-18-10" name = "__codelineno-18-10" href = "#__codelineno-18-10" > < / 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-18-11" name = "__codelineno-18-11" href = "#__codelineno-18-11" > < / a > < span class = "n" > _size< / 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" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-18-15" name = "__codelineno-18-15" href = "#__codelineno-18-15" > < / 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-18-16" name = "__codelineno-18-16" href = "#__codelineno-18-16" > < / a > < span class = "n" > size< / span > < span class = "p" > ()< / span > < span class = "p" > ==< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-18-17" name = "__codelineno-18-17" href = "#__codelineno-18-17" > < / a > < span class = "p" > }< / 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 = "cm" > /* 入队 */< / span >
< a id = "__codelineno-18-20" name = "__codelineno-18-20" href = "#__codelineno-18-20" > < / a > < 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 = "p" > {< / span >
< a id = "__codelineno-18-21" name = "__codelineno-18-21" href = "#__codelineno-18-21" > < / a > < span class = "c1" > // 尾结点后添加 num< / span >
< a id = "__codelineno-18-22" name = "__codelineno-18-22" href = "#__codelineno-18-22" > < / 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" > x< / span > < span class = "p" > :< / span > < span class = "n" > num< / span > < span class = "p" > )< / span >
< a id = "__codelineno-18-23" name = "__codelineno-18-23" href = "#__codelineno-18-23" > < / a > < span class = "c1" > // 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-18-24" name = "__codelineno-18-24" href = "#__codelineno-18-24" > < / a > < span class = "k" > if< / span > < span class = "n" > front< / span > < span class = "p" > ==< / span > < span class = "kc" > nil< / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-25" name = "__codelineno-18-25" href = "#__codelineno-18-25" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-18-26" name = "__codelineno-18-26" href = "#__codelineno-18-26" > < / a > < span class = "n" > rear< / span > < span class = "p" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-18-27" name = "__codelineno-18-27" href = "#__codelineno-18-27" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-28" name = "__codelineno-18-28" href = "#__codelineno-18-28" > < / a > < span class = "c1" > // 如果队列不为空，则将该结点添加到尾结点后< / span >
< a id = "__codelineno-18-29" name = "__codelineno-18-29" href = "#__codelineno-18-29" > < / a > < span class = "k" > else< / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-30" name = "__codelineno-18-30" href = "#__codelineno-18-30" > < / 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-18-31" name = "__codelineno-18-31" href = "#__codelineno-18-31" > < / a > < span class = "n" > rear< / span > < span class = "p" > =< / span > < span class = "n" > node< / span >
< a id = "__codelineno-18-32" name = "__codelineno-18-32" href = "#__codelineno-18-32" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-33" name = "__codelineno-18-33" href = "#__codelineno-18-33" > < / a > < span class = "n" > _size< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-18-34" name = "__codelineno-18-34" href = "#__codelineno-18-34" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-35" name = "__codelineno-18-35" href = "#__codelineno-18-35" > < / a >
< a id = "__codelineno-18-36" name = "__codelineno-18-36" href = "#__codelineno-18-36" > < / a > < span class = "cm" > /* 出队 */< / span >
< a id = "__codelineno-18-37" name = "__codelineno-18-37" href = "#__codelineno-18-37" > < / a > < span class = "p" > @< / span > < span class = "n" > discardableResult< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-18-38" name = "__codelineno-18-38" href = "#__codelineno-18-38" > < / a > < span class = "kd" > func< / span > < span class = "nf" > pop< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-18-39" name = "__codelineno-18-39" href = "#__codelineno-18-39" > < / a > < span class = "kd" > let< / span > < span class = "nv" > num< / span > < span class = "p" > =< / span > < span class = "n" > peek< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-18-40" name = "__codelineno-18-40" href = "#__codelineno-18-40" > < / a > < span class = "c1" > // 删除头结点< / span >
< a id = "__codelineno-18-41" name = "__codelineno-18-41" href = "#__codelineno-18-41" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "n" > front< / span > < span class = "p" > ?.< / span > < span class = "n" > next< / span >
< a id = "__codelineno-18-42" name = "__codelineno-18-42" href = "#__codelineno-18-42" > < / a > < span class = "n" > _size< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-18-43" name = "__codelineno-18-43" href = "#__codelineno-18-43" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-18-44" name = "__codelineno-18-44" href = "#__codelineno-18-44" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-45" name = "__codelineno-18-45" href = "#__codelineno-18-45" > < / a >
< a id = "__codelineno-18-46" name = "__codelineno-18-46" href = "#__codelineno-18-46" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-18-47" name = "__codelineno-18-47" href = "#__codelineno-18-47" > < / a > < span class = "kd" > func< / span > < span class = "nf" > peek< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-48" name = "__codelineno-18-48" href = "#__codelineno-18-48" > < / a > < span class = "k" > if< / span > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-49" name = "__codelineno-18-49" href = "#__codelineno-18-49" > < / a > < span class = "bp" > fatalError< / span > < span class = "p" > (< / span > < span class = "s" > " 队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-18-50" name = "__codelineno-18-50" href = "#__codelineno-18-50" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-51" name = "__codelineno-18-51" href = "#__codelineno-18-51" > < / a > < span class = "k" > return< / span > < span class = "n" > front< / span > < span class = "p" > !.< / span > < span class = "n" > val< / span >
< a id = "__codelineno-18-52" name = "__codelineno-18-52" href = "#__codelineno-18-52" > < / a > < span class = "p" > }< / span >
2023-02-08 20:30:33 +08:00
< a id = "__codelineno-18-53" name = "__codelineno-18-53" href = "#__codelineno-18-53" > < / a >
< a id = "__codelineno-18-54" name = "__codelineno-18-54" href = "#__codelineno-18-54" > < / a > < span class = "cm" > /* 将链表转化为 Array 并返回 */< / span >
< a id = "__codelineno-18-55" name = "__codelineno-18-55" href = "#__codelineno-18-55" > < / 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-18-56" name = "__codelineno-18-56" href = "#__codelineno-18-56" > < / a > < span class = "kd" > var< / span > < span class = "nv" > node< / span > < span class = "p" > =< / span > < span class = "n" > front< / span >
< a id = "__codelineno-18-57" name = "__codelineno-18-57" href = "#__codelineno-18-57" > < / 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-18-58" name = "__codelineno-18-58" href = "#__codelineno-18-58" > < / 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-18-59" name = "__codelineno-18-59" href = "#__codelineno-18-59" > < / 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-18-60" name = "__codelineno-18-60" href = "#__codelineno-18-60" > < / 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-18-61" name = "__codelineno-18-61" href = "#__codelineno-18-61" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-62" name = "__codelineno-18-62" href = "#__codelineno-18-62" > < / a > < span class = "k" > return< / span > < span class = "n" > res< / span >
< a id = "__codelineno-18-63" name = "__codelineno-18-63" href = "#__codelineno-18-63" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-18-64" name = "__codelineno-18-64" href = "#__codelineno-18-64" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-02-09 22:55:35 +08:00
< div class = "highlight" > < span class = "filename" > linkedlist_queue.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-19-1" name = "__codelineno-19-1" href = "#__codelineno-19-1" > < / a > < span class = "c1" > // 基于链表实现的队列< / span >
< a id = "__codelineno-19-2" name = "__codelineno-19-2" href = "#__codelineno-19-2" > < / a > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > LinkedListQueue< / 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-19-3" name = "__codelineno-19-3" href = "#__codelineno-19-3" > < / 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-19-4" name = "__codelineno-19-4" href = "#__codelineno-19-4" > < / 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-19-5" name = "__codelineno-19-5" href = "#__codelineno-19-5" > < / a >
< a id = "__codelineno-19-6" name = "__codelineno-19-6" href = "#__codelineno-19-6" > < / 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" > inc< / span > < span class = "p" > .< / 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" > // 头结点 front< / span >
< a id = "__codelineno-19-7" name = "__codelineno-19-7" href = "#__codelineno-19-7" > < / 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" > inc< / span > < span class = "p" > .< / 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" > // 尾结点 rear< / span >
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< a id = "__codelineno-19-8" name = "__codelineno-19-8" href = "#__codelineno-19-8" > < / 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" > // 队列的长度< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-19-9" name = "__codelineno-19-9" href = "#__codelineno-19-9" > < / 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-19-10" name = "__codelineno-19-10" href = "#__codelineno-19-10" > < / 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-19-11" name = "__codelineno-19-11" href = "#__codelineno-19-11" > < / a >
2023-02-10 01:03:44 +08:00
< a id = "__codelineno-19-12" name = "__codelineno-19-12" href = "#__codelineno-19-12" > < / a > < span class = "w" > < / span > < span class = "c1" > // 构造方法（分配内存+初始化队列）< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-19-13" name = "__codelineno-19-13" href = "#__codelineno-19-13" > < / 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-19-14" name = "__codelineno-19-14" href = "#__codelineno-19-14" > < / 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-19-15" name = "__codelineno-19-15" href = "#__codelineno-19-15" > < / 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-19-16" name = "__codelineno-19-16" href = "#__codelineno-19-16" > < / 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-19-17" name = "__codelineno-19-17" href = "#__codelineno-19-17" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-19-18" name = "__codelineno-19-18" href = "#__codelineno-19-18" > < / 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-19-19" name = "__codelineno-19-19" href = "#__codelineno-19-19" > < / 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 >
2023-03-13 22:41:04 +08:00
< a id = "__codelineno-19-20" name = "__codelineno-19-20" href = "#__codelineno-19-20" > < / 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 >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-19-21" name = "__codelineno-19-21" href = "#__codelineno-19-21" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-19-22" name = "__codelineno-19-22" href = "#__codelineno-19-22" > < / a >
2023-02-10 01:03:44 +08:00
< a id = "__codelineno-19-23" name = "__codelineno-19-23" href = "#__codelineno-19-23" > < / a > < span class = "w" > < / span > < span class = "c1" > // 析构方法（释放内存）< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-19-24" name = "__codelineno-19-24" href = "#__codelineno-19-24" > < / 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-19-25" name = "__codelineno-19-25" href = "#__codelineno-19-25" > < / 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-19-26" name = "__codelineno-19-26" href = "#__codelineno-19-26" > < / 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-19-27" name = "__codelineno-19-27" href = "#__codelineno-19-27" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-19-28" name = "__codelineno-19-28" href = "#__codelineno-19-28" > < / a >
< a id = "__codelineno-19-29" name = "__codelineno-19-29" href = "#__codelineno-19-29" > < / a > < span class = "w" > < / span > < span class = "c1" > // 获取队列的长度< / span >
< a id = "__codelineno-19-30" name = "__codelineno-19-30" href = "#__codelineno-19-30" > < / 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 >
2023-03-13 22:41:04 +08:00
< a id = "__codelineno-19-31" name = "__codelineno-19-31" href = "#__codelineno-19-31" > < / 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 >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-19-32" name = "__codelineno-19-32" href = "#__codelineno-19-32" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-19-33" name = "__codelineno-19-33" href = "#__codelineno-19-33" > < / a >
< a id = "__codelineno-19-34" name = "__codelineno-19-34" href = "#__codelineno-19-34" > < / a > < span class = "w" > < / span > < span class = "c1" > // 判断队列是否为空< / span >
< a id = "__codelineno-19-35" name = "__codelineno-19-35" href = "#__codelineno-19-35" > < / 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-19-36" name = "__codelineno-19-36" href = "#__codelineno-19-36" > < / 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-19-37" name = "__codelineno-19-37" href = "#__codelineno-19-37" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-19-38" name = "__codelineno-19-38" href = "#__codelineno-19-38" > < / a >
< a id = "__codelineno-19-39" name = "__codelineno-19-39" href = "#__codelineno-19-39" > < / a > < span class = "w" > < / span > < span class = "c1" > // 访问队首元素< / span >
< a id = "__codelineno-19-40" name = "__codelineno-19-40" href = "#__codelineno-19-40" > < / 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" > peek< / 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-19-41" name = "__codelineno-19-41" href = "#__codelineno-19-41" > < / 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" > 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 > < span class = "w" > < / span > < span class = "nb" > @panic< / span > < span class = "p" > (< / span > < span class = "s" > " 队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-19-42" name = "__codelineno-19-42" href = "#__codelineno-19-42" > < / 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-19-43" name = "__codelineno-19-43" href = "#__codelineno-19-43" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-19-44" name = "__codelineno-19-44" href = "#__codelineno-19-44" > < / a >
< a id = "__codelineno-19-45" name = "__codelineno-19-45" href = "#__codelineno-19-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 入队< / span >
< a id = "__codelineno-19-46" name = "__codelineno-19-46" href = "#__codelineno-19-46" > < / 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 = "o" > !< / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-47" name = "__codelineno-19-47" href = "#__codelineno-19-47" > < / a > < span class = "w" > < / span > < span class = "c1" > // 尾结点后添加 num< / span >
< a id = "__codelineno-19-48" name = "__codelineno-19-48" href = "#__codelineno-19-48" > < / 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" > inc< / 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-19-49" name = "__codelineno-19-49" href = "#__codelineno-19-49" > < / 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-19-50" name = "__codelineno-19-50" href = "#__codelineno-19-50" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列为空，则令头、尾结点都指向该结点< / span >
< a id = "__codelineno-19-51" name = "__codelineno-19-51" href = "#__codelineno-19-51" > < / 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" > front< / 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-19-52" name = "__codelineno-19-52" href = "#__codelineno-19-52" > < / 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-19-53" name = "__codelineno-19-53" href = "#__codelineno-19-53" > < / 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-19-54" name = "__codelineno-19-54" href = "#__codelineno-19-54" > < / a > < span class = "w" > < / span > < span class = "c1" > // 如果队列不为空，则将该结点添加到尾结点后< / span >
< a id = "__codelineno-19-55" name = "__codelineno-19-55" href = "#__codelineno-19-55" > < / 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-19-56" name = "__codelineno-19-56" href = "#__codelineno-19-56" > < / 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-19-57" name = "__codelineno-19-57" href = "#__codelineno-19-57" > < / 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-19-58" name = "__codelineno-19-58" href = "#__codelineno-19-58" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-03-13 22:41:04 +08:00
< a id = "__codelineno-19-59" name = "__codelineno-19-59" href = "#__codelineno-19-59" > < / 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 >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-19-60" name = "__codelineno-19-60" href = "#__codelineno-19-60" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / 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 = "w" > < / span > < span class = "c1" > // 出队< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-19-63" name = "__codelineno-19-63" href = "#__codelineno-19-63" > < / 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" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-19-64" name = "__codelineno-19-64" href = "#__codelineno-19-64" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / 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" > self< / span > < span class = "p" > .< / span > < span class = "n" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-19-65" name = "__codelineno-19-65" href = "#__codelineno-19-65" > < / a > < span class = "w" > < / span > < span class = "c1" > // 删除头结点< / span >
< a id = "__codelineno-19-66" name = "__codelineno-19-66" href = "#__codelineno-19-66" > < / 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" > 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 >
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< a id = "__codelineno-19-67" name = "__codelineno-19-67" href = "#__codelineno-19-67" > < / 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 >
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< a id = "__codelineno-19-68" name = "__codelineno-19-68" href = "#__codelineno-19-68" > < / 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-19-69" name = "__codelineno-19-69" href = "#__codelineno-19-69" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-19-70" name = "__codelineno-19-70" href = "#__codelineno-19-70" > < / a >
< a id = "__codelineno-19-71" name = "__codelineno-19-71" href = "#__codelineno-19-71" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将链表转换为数组< / span >
< a id = "__codelineno-19-72" name = "__codelineno-19-72" href = "#__codelineno-19-72" > < / 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-19-73" name = "__codelineno-19-73" href = "#__codelineno-19-73" > < / 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-19-74" name = "__codelineno-19-74" href = "#__codelineno-19-74" > < / 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-19-75" name = "__codelineno-19-75" href = "#__codelineno-19-75" > < / 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-19-76" name = "__codelineno-19-76" href = "#__codelineno-19-76" > < / 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-19-77" name = "__codelineno-19-77" href = "#__codelineno-19-77" > < / 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-19-78" name = "__codelineno-19-78" href = "#__codelineno-19-78" > < / 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-19-79" name = "__codelineno-19-79" href = "#__codelineno-19-79" > < / 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-19-80" name = "__codelineno-19-80" href = "#__codelineno-19-80" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-19-81" name = "__codelineno-19-81" href = "#__codelineno-19-81" > < / 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-19-82" name = "__codelineno-19-82" href = "#__codelineno-19-82" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-19-83" name = "__codelineno-19-83" href = "#__codelineno-19-83" > < / a > < span class = "w" > < / span > < span class = "p" > };< / span >
< a id = "__codelineno-19-84" name = "__codelineno-19-84" href = "#__codelineno-19-84" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< / div >
< / div >
< h3 id = "_2" > 基于数组的实现< a class = "headerlink" href = "#_2" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > 数组的删除首元素的时间复杂度为 < span class = "arithmatex" > \(O(n)\)< / span > ，这会导致出队操作效率低下。然而，我们可以采取下述的巧妙方法来避免这个问题。< / p >
< p > 考虑借助一个变量 < code > front< / code > 来指向队首元素的索引，并维护变量 < code > queSize< / code > 来记录队列长度。我们定义 < code > rear = front + queSize< / code > ，该公式计算出来的 < code > rear< / code > 指向“队尾元素索引 < span class = "arithmatex" > \(+1\)< / span > ”的位置。< / p >
< p > 在该设计下，< strong > 数组中包含元素的有效区间为 < code > [front, rear - 1]< / code > < / strong > ，进而< / p >
< ul >
< li > 对于入队操作，将输入元素赋值给 < code > rear< / code > 索引处，并将 < code > queSize< / code > 自增 < span class = "arithmatex" > \(1\)< / span > 即可；< / li >
< li > 对于出队操作，仅需将 < code > front< / code > 自增 < span class = "arithmatex" > \(1\)< / span > ，并将 < code > queSize< / code > 自减 < span class = "arithmatex" > \(1\)< / span > 即可；< / li >
< / ul >
< p > 观察发现，入队与出队操作都仅需单次操作即可完成，时间复杂度皆为 < span class = "arithmatex" > \(O(1)\)< / span > 。< / p >
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< div class = "tabbed-set tabbed-alternate" data-tabs = "4:3" > < 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" / > < div class = "tabbed-labels" > < label for = "__tabbed_4_1" > ArrayQueue< / label > < label for = "__tabbed_4_2" > push()< / label > < label for = "__tabbed_4_3" > pop()< / label > < / div >
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< div class = "tabbed-content" >
< div class = "tabbed-block" >
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< p > < img alt = "基于数组实现队列的入队出队操作" src = "../queue.assets/array_queue.png" / > < / p >
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< / div >
< div class = "tabbed-block" >
< p > < img alt = "array_queue_push" src = "../queue.assets/array_queue_push.png" / > < / p >
< / div >
< div class = "tabbed-block" >
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< p > < img alt = "array_queue_pop" src = "../queue.assets/array_queue_pop.png" / > < / p >
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< / div >
< / div >
< / div >
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< p > 细心的同学可能会发现一个问题：在不断入队与出队的过程中，< code > front< / code > 和 < code > rear< / code > 都在向右移动，< strong > 在到达数组尾部后就无法继续移动了< / strong > 。为解决此问题，< strong > 我们考虑将数组看作是首尾相接的< / strong > ，这样的数组被称为「环形数组」。< / p >
< p > 对于环形数组，我们需要令 < code > front< / code > 或 < code > rear< / code > 在越过数组尾部后，直接绕回到数组头部接续遍历。这种周期性规律可以通过「取余操作」来实现，详情请见以下代码。< / p >
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< div class = "tabbed-set tabbed-alternate" data-tabs = "5:10" > < 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" / > < 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 > < / div >
< div class = "tabbed-content" >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_queue.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-20-1" name = "__codelineno-20-1" href = "#__codelineno-20-1" > < / a > < span class = "cm" > /* 基于环形数组实现的队列 */< / span >
< a id = "__codelineno-20-2" name = "__codelineno-20-2" href = "#__codelineno-20-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > ArrayQueue< / 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 = "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" > // 用于存储队列元素的数组< / span >
< a id = "__codelineno-20-4" name = "__codelineno-20-4" href = "#__codelineno-20-4" > < / 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-20-5" name = "__codelineno-20-5" href = "#__codelineno-20-5" > < / 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" > // 队列长度< / span >
< a id = "__codelineno-20-6" name = "__codelineno-20-6" href = "#__codelineno-20-6" > < / a >
< a id = "__codelineno-20-7" name = "__codelineno-20-7" href = "#__codelineno-20-7" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "nf" > ArrayQueue< / 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-20-8" name = "__codelineno-20-8" href = "#__codelineno-20-8" > < / a > < span class = "w" > < / 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 = "o" > [< / span > < span class = "n" > capacity< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-9" name = "__codelineno-20-9" href = "#__codelineno-20-9" > < / 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-20-10" name = "__codelineno-20-10" href = "#__codelineno-20-10" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-11" name = "__codelineno-20-11" href = "#__codelineno-20-11" > < / a >
< a id = "__codelineno-20-12" name = "__codelineno-20-12" href = "#__codelineno-20-12" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的容量 */< / span >
< a id = "__codelineno-20-13" name = "__codelineno-20-13" href = "#__codelineno-20-13" > < / 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-20-14" name = "__codelineno-20-14" href = "#__codelineno-20-14" > < / 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-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 >
< a id = "__codelineno-20-17" name = "__codelineno-20-17" href = "#__codelineno-20-17" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-20-18" name = "__codelineno-20-18" href = "#__codelineno-20-18" > < / 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-20-19" name = "__codelineno-20-19" href = "#__codelineno-20-19" > < / 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-20-20" name = "__codelineno-20-20" href = "#__codelineno-20-20" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-21" name = "__codelineno-20-21" href = "#__codelineno-20-21" > < / a >
< a id = "__codelineno-20-22" name = "__codelineno-20-22" href = "#__codelineno-20-22" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-20-23" name = "__codelineno-20-23" href = "#__codelineno-20-23" > < / 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-20-24" name = "__codelineno-20-24" href = "#__codelineno-20-24" > < / 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-20-25" name = "__codelineno-20-25" href = "#__codelineno-20-25" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-26" name = "__codelineno-20-26" href = "#__codelineno-20-26" > < / a >
< a id = "__codelineno-20-27" name = "__codelineno-20-27" href = "#__codelineno-20-27" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-20-28" name = "__codelineno-20-28" href = "#__codelineno-20-28" > < / 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" > 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 = "p" > {< / span >
< a id = "__codelineno-20-29" name = "__codelineno-20-29" href = "#__codelineno-20-29" > < / 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-20-30" name = "__codelineno-20-30" href = "#__codelineno-20-30" > < / 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" > " 队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-20-31" name = "__codelineno-20-31" href = "#__codelineno-20-31" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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 = "p" > }< / span >
< a id = "__codelineno-20-33" name = "__codelineno-20-33" href = "#__codelineno-20-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-20-34" name = "__codelineno-20-34" href = "#__codelineno-20-34" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
< a id = "__codelineno-20-35" name = "__codelineno-20-35" href = "#__codelineno-20-35" > < / 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 = "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 > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ();< / span >
2023-02-16 02:20:55 +08:00
< a id = "__codelineno-20-36" name = "__codelineno-20-36" href = "#__codelineno-20-36" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-20-37" name = "__codelineno-20-37" href = "#__codelineno-20-37" > < / 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-20-38" name = "__codelineno-20-38" href = "#__codelineno-20-38" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / 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 = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-20-42" name = "__codelineno-20-42" href = "#__codelineno-20-42" > < / 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" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-20-43" name = "__codelineno-20-43" href = "#__codelineno-20-43" > < / 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" > peek< / 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 = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-20-45" name = "__codelineno-20-45" href = "#__codelineno-20-45" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / 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 > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-20-46" name = "__codelineno-20-46" href = "#__codelineno-20-46" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-20-47" name = "__codelineno-20-47" href = "#__codelineno-20-47" > < / 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-20-48" name = "__codelineno-20-48" href = "#__codelineno-20-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-49" name = "__codelineno-20-49" href = "#__codelineno-20-49" > < / a >
< a id = "__codelineno-20-50" name = "__codelineno-20-50" href = "#__codelineno-20-50" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-20-51" name = "__codelineno-20-51" href = "#__codelineno-20-51" > < / 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" > peek< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-20-52" name = "__codelineno-20-52" href = "#__codelineno-20-52" > < / 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-20-53" name = "__codelineno-20-53" href = "#__codelineno-20-53" > < / 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" > EmptyStackException< / 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" > nums< / span > < span class = "o" > [< / span > < span class = "n" > front< / span > < span class = "o" > ]< / 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 = "cm" > /* 返回数组 */< / span >
< a id = "__codelineno-20-58" name = "__codelineno-20-58" href = "#__codelineno-20-58" > < / 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-20-59" name = "__codelineno-20-59" href = "#__codelineno-20-59" > < / 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-20-60" name = "__codelineno-20-60" href = "#__codelineno-20-60" > < / 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-20-61" name = "__codelineno-20-61" href = "#__codelineno-20-61" > < / 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-20-62" name = "__codelineno-20-62" href = "#__codelineno-20-62" > < / 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" > j< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span > < span class = "o" > ]< / 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 = "p" > }< / span >
< a id = "__codelineno-20-64" name = "__codelineno-20-64" href = "#__codelineno-20-64" > < / 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-20-65" name = "__codelineno-20-65" href = "#__codelineno-20-65" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-20-66" name = "__codelineno-20-66" href = "#__codelineno-20-66" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_queue.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-21-1" name = "__codelineno-21-1" href = "#__codelineno-21-1" > < / a > < span class = "cm" > /* 基于环形数组实现的队列 */< / span >
< a id = "__codelineno-21-2" name = "__codelineno-21-2" href = "#__codelineno-21-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > ArrayQueue< / 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 = "k" > private< / span > < span class = "o" > :< / span >
< a id = "__codelineno-21-4" name = "__codelineno-21-4" href = "#__codelineno-21-4" > < / 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-21-5" name = "__codelineno-21-5" href = "#__codelineno-21-5" > < / 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-21-6" name = "__codelineno-21-6" href = "#__codelineno-21-6" > < / 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" > // 队列长度< / span >
< a id = "__codelineno-21-7" name = "__codelineno-21-7" href = "#__codelineno-21-7" > < / 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-21-8" name = "__codelineno-21-8" href = "#__codelineno-21-8" > < / a >
< a id = "__codelineno-21-9" name = "__codelineno-21-9" href = "#__codelineno-21-9" > < / a > < span class = "k" > public< / span > < span class = "o" > :< / span >
< a id = "__codelineno-21-10" name = "__codelineno-21-10" href = "#__codelineno-21-10" > < / a > < span class = "w" > < / span > < span class = "n" > ArrayQueue< / 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-21-11" name = "__codelineno-21-11" href = "#__codelineno-21-11" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化数组< / span >
< a id = "__codelineno-21-12" name = "__codelineno-21-12" href = "#__codelineno-21-12" > < / a > < span class = "w" > < / 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-21-13" name = "__codelineno-21-13" href = "#__codelineno-21-13" > < / a > < span class = "w" > < / 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-21-14" name = "__codelineno-21-14" href = "#__codelineno-21-14" > < / 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-21-15" name = "__codelineno-21-15" href = "#__codelineno-21-15" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-16" name = "__codelineno-21-16" href = "#__codelineno-21-16" > < / a >
< a id = "__codelineno-21-17" name = "__codelineno-21-17" href = "#__codelineno-21-17" > < / a > < span class = "w" > < / span > < span class = "o" > ~< / span > < span class = "n" > ArrayQueue< / span > < span class = "p" > ()< / span > < span class = "w" > < / 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" > delete< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "n" > nums< / 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" > /* 获取队列的容量 */< / 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" > capacity< / 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 = "n" > queCapacity< / 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" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-21-27" name = "__codelineno-21-27" href = "#__codelineno-21-27" > < / 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-21-28" 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" > queSize< / 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" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-21-32" name = "__codelineno-21-32" href = "#__codelineno-21-32" > < / a > < span class = "w" > < / span > < span class = "kt" > bool< / span > < span class = "w" > < / span > < span class = "n" > empty< / 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 = "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-21-34" name = "__codelineno-21-34" href = "#__codelineno-21-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-35" name = "__codelineno-21-35" href = "#__codelineno-21-35" > < / a >
< a id = "__codelineno-21-36" name = "__codelineno-21-36" href = "#__codelineno-21-36" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-21-37" name = "__codelineno-21-37" href = "#__codelineno-21-37" > < / 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 = "p" > {< / span >
< a id = "__codelineno-21-38" name = "__codelineno-21-38" href = "#__codelineno-21-38" > < / 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" > queCapacity< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-39" name = "__codelineno-21-39" href = "#__codelineno-21-39" > < / 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" > " 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-21-40" name = "__codelineno-21-40" href = "#__codelineno-21-40" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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 = "p" > }< / span >
< a id = "__codelineno-21-42" name = "__codelineno-21-42" href = "#__codelineno-21-42" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算队尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-21-43" name = "__codelineno-21-43" href = "#__codelineno-21-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
< a id = "__codelineno-21-44" name = "__codelineno-21-44" href = "#__codelineno-21-44" > < / 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 = "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 > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > queCapacity< / span > < span class = "p" > ;< / span >
2023-02-16 02:20:55 +08:00
< a id = "__codelineno-21-45" name = "__codelineno-21-45" href = "#__codelineno-21-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-21-46" name = "__codelineno-21-46" href = "#__codelineno-21-46" > < / 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-21-47" name = "__codelineno-21-47" href = "#__codelineno-21-47" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / 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 = "p" > }< / span >
< a id = "__codelineno-21-49" name = "__codelineno-21-49" href = "#__codelineno-21-49" > < / a >
< a id = "__codelineno-21-50" name = "__codelineno-21-50" href = "#__codelineno-21-50" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-21-51" name = "__codelineno-21-51" href = "#__codelineno-21-51" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-21-52" name = "__codelineno-21-52" href = "#__codelineno-21-52" > < / 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" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-21-53" name = "__codelineno-21-53" href = "#__codelineno-21-53" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-21-54" name = "__codelineno-21-54" href = "#__codelineno-21-54" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / 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 > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > queCapacity< / 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" > queSize< / span > < span class = "o" > --< / 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" > /* 访问队首元素 */< / span >
< a id = "__codelineno-21-59" name = "__codelineno-21-59" href = "#__codelineno-21-59" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > peek< / 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 = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > empty< / 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 = "k" > throw< / span > < span class = "w" > < / span > < span class = "n" > out_of_range< / span > < span class = "p" > (< / span > < span class = "s" > " 队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-62" name = "__codelineno-21-62" href = "#__codelineno-21-62" > < / 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-21-63" name = "__codelineno-21-63" href = "#__codelineno-21-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-64" name = "__codelineno-21-64" href = "#__codelineno-21-64" > < / a >
< a id = "__codelineno-21-65" name = "__codelineno-21-65" href = "#__codelineno-21-65" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 将数组转化为 Vector 并返回 */< / span >
< a id = "__codelineno-21-66" name = "__codelineno-21-66" href = "#__codelineno-21-66" > < / 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 >
2023-02-08 22:16:28 +08:00
< a id = "__codelineno-21-67" name = "__codelineno-21-67" href = "#__codelineno-21-67" > < / 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-21-68" name = "__codelineno-21-68" href = "#__codelineno-21-68" > < / 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" > arr< / span > < span class = "p" > (< / span > < span class = "n" > queSize< / 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 = "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-21-70" name = "__codelineno-21-70" href = "#__codelineno-21-70" > < / 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" > 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" > queCapacity< / 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 = "p" > }< / span >
< a id = "__codelineno-21-72" name = "__codelineno-21-72" href = "#__codelineno-21-72" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > arr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-73" name = "__codelineno-21-73" href = "#__codelineno-21-73" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-74" name = "__codelineno-21-74" href = "#__codelineno-21-74" > < / a > < span class = "p" > };< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-03-03 02:46:43 +08:00
< div class = "highlight" > < span class = "filename" > array_queue.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-22-1" name = "__codelineno-22-1" href = "#__codelineno-22-1" > < / a > < span class = "k" > class< / span > < span class = "nc" > ArrayQueue< / span > < span class = "p" > :< / span >
< a id = "__codelineno-22-2" name = "__codelineno-22-2" href = "#__codelineno-22-2" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 基于环形数组实现的队列 " " " < / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-22-3" name = "__codelineno-22-3" href = "#__codelineno-22-3" > < / 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" > size< / 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 >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-4" name = "__codelineno-22-4" href = "#__codelineno-22-4" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 构造方法 " " " < / span >
2023-03-23 18:57:04 +08:00
< a id = "__codelineno-22-5" name = "__codelineno-22-5" href = "#__codelineno-22-5" > < / 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" > size< / span > < span class = "c1" > # 用于存储队列元素的数组< / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-22-6" name = "__codelineno-22-6" href = "#__codelineno-22-6" > < / 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 > < span class = "c1" > # 队首指针，指向队首元素< / span >
< a id = "__codelineno-22-7" name = "__codelineno-22-7" href = "#__codelineno-22-7" > < / 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" > # 队列长度< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-8" name = "__codelineno-22-8" href = "#__codelineno-22-8" > < / a >
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< a id = "__codelineno-22-9" name = "__codelineno-22-9" href = "#__codelineno-22-9" > < / 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 >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-10" name = "__codelineno-22-10" href = "#__codelineno-22-10" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 获取队列的容量 " " " < / span >
< a id = "__codelineno-22-11" name = "__codelineno-22-11" href = "#__codelineno-22-11" > < / 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 >
< a id = "__codelineno-22-12" name = "__codelineno-22-12" href = "#__codelineno-22-12" > < / a >
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< a id = "__codelineno-22-13" name = "__codelineno-22-13" href = "#__codelineno-22-13" > < / 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 >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-14" name = "__codelineno-22-14" href = "#__codelineno-22-14" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 获取队列的长度 " " " < / span >
< a id = "__codelineno-22-15" name = "__codelineno-22-15" href = "#__codelineno-22-15" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __size< / span >
< a id = "__codelineno-22-16" name = "__codelineno-22-16" href = "#__codelineno-22-16" > < / a >
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< a id = "__codelineno-22-17" name = "__codelineno-22-17" href = "#__codelineno-22-17" > < / 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 >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-18" name = "__codelineno-22-18" href = "#__codelineno-22-18" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 判断队列是否为空 " " " < / span >
< a id = "__codelineno-22-19" name = "__codelineno-22-19" href = "#__codelineno-22-19" > < / 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-22-20" name = "__codelineno-22-20" href = "#__codelineno-22-20" > < / a >
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< a id = "__codelineno-22-21" name = "__codelineno-22-21" href = "#__codelineno-22-21" > < / 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 = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-22" name = "__codelineno-22-22" href = "#__codelineno-22-22" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 入队 " " " < / span >
< a id = "__codelineno-22-23" name = "__codelineno-22-23" href = "#__codelineno-22-23" > < / a > < span class = "k" > assert< / 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 > < span class = "s2" > " 队列已满" < / span >
< a id = "__codelineno-22-24" name = "__codelineno-22-24" href = "#__codelineno-22-24" > < / a > < span class = "c1" > # 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-22-25" name = "__codelineno-22-25" href = "#__codelineno-22-25" > < / a > < span class = "c1" > # 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
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< a id = "__codelineno-22-26" name = "__codelineno-22-26" href = "#__codelineno-22-26" > < / a > < span class = "n" > rear< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "o" > =< / 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 > < span class = "o" > %< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-27" name = "__codelineno-22-27" href = "#__codelineno-22-27" > < / a > < span class = "c1" > # 将 num 添加至队尾< / span >
< a id = "__codelineno-22-28" name = "__codelineno-22-28" href = "#__codelineno-22-28" > < / 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-22-29" name = "__codelineno-22-29" href = "#__codelineno-22-29" > < / 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-22-30" name = "__codelineno-22-30" href = "#__codelineno-22-30" > < / a >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-22-31" name = "__codelineno-22-31" href = "#__codelineno-22-31" > < / 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 = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-32" name = "__codelineno-22-32" href = "#__codelineno-22-32" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 出队 " " " < / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-22-33" name = "__codelineno-22-33" href = "#__codelineno-22-33" > < / a > < span class = "n" > num< / 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" > peek< / span > < span class = "p" > ()< / span >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-34" name = "__codelineno-22-34" href = "#__codelineno-22-34" > < / a > < span class = "c1" > # 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-22-35" name = "__codelineno-22-35" href = "#__codelineno-22-35" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __front< / span > < span class = "o" > =< / 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 > < 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-22-36" name = "__codelineno-22-36" href = "#__codelineno-22-36" > < / 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-22-37" name = "__codelineno-22-37" href = "#__codelineno-22-37" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-22-38" name = "__codelineno-22-38" href = "#__codelineno-22-38" > < / a >
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< a id = "__codelineno-22-39" name = "__codelineno-22-39" href = "#__codelineno-22-39" > < / a > < span class = "k" > def< / span > < span class = "nf" > peek< / 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 >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-40" name = "__codelineno-22-40" href = "#__codelineno-22-40" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 访问队首元素 " " " < / span >
< a id = "__codelineno-22-41" name = "__codelineno-22-41" href = "#__codelineno-22-41" > < / a > < span class = "k" > assert< / span > < span class = "ow" > not< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > is_empty< / span > < span class = "p" > (),< / span > < span class = "s2" > " 队列为空" < / span >
< a id = "__codelineno-22-42" name = "__codelineno-22-42" href = "#__codelineno-22-42" > < / 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-22-43" name = "__codelineno-22-43" href = "#__codelineno-22-43" > < / a >
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< a id = "__codelineno-22-44" name = "__codelineno-22-44" href = "#__codelineno-22-44" > < / a > < span class = "k" > def< / span > < span class = "nf" > to_list< / 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 >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-45" name = "__codelineno-22-45" href = "#__codelineno-22-45" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 返回列表用于打印 " " " < / span >
2023-03-23 18:57:04 +08:00
< a id = "__codelineno-22-46" name = "__codelineno-22-46" href = "#__codelineno-22-46" > < / a > < span class = "n" > res< / 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 = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "p" > ()< / span >
2023-03-12 18:46:10 +08:00
< a id = "__codelineno-22-47" name = "__codelineno-22-47" href = "#__codelineno-22-47" > < / a > < span class = "n" > j< / 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 >
2023-03-03 02:46:43 +08:00
< a id = "__codelineno-22-48" name = "__codelineno-22-48" href = "#__codelineno-22-48" > < / 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-22-49" name = "__codelineno-22-49" href = "#__codelineno-22-49" > < / 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 = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > __nums< / span > < span class = "p" > [(< / span > < span class = "n" > j< / 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-22-50" name = "__codelineno-22-50" href = "#__codelineno-22-50" > < / a > < span class = "n" > j< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-22-51" name = "__codelineno-22-51" href = "#__codelineno-22-51" > < / a > < span class = "k" > return< / span > < span class = "n" > res< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_queue.go< / 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队列 */< / span >
< a id = "__codelineno-23-2" name = "__codelineno-23-2" href = "#__codelineno-23-2" > < / a > < span class = "kd" > type< / span > < span class = "w" > < / span > < span class = "nx" > arrayQueue< / span > < span class = "w" > < / span > < span class = "kd" > struct< / 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 = "nx" > nums< / span > < span class = "w" > < / span > < span class = "p" > []< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 用于存储队列元素的数组< / span >
< a id = "__codelineno-23-4" name = "__codelineno-23-4" href = "#__codelineno-23-4" > < / 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-23-5" name = "__codelineno-23-5" href = "#__codelineno-23-5" > < / 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" > // 队列长度< / span >
< a id = "__codelineno-23-6" name = "__codelineno-23-6" href = "#__codelineno-23-6" > < / 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-23-7" name = "__codelineno-23-7" href = "#__codelineno-23-7" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-23-8" name = "__codelineno-23-8" href = "#__codelineno-23-8" > < / a >
2023-02-09 04:43:20 +08:00
< a id = "__codelineno-23-9" name = "__codelineno-23-9" href = "#__codelineno-23-9" > < / a > < span class = "cm" > /* 初始化队列 */< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-10" name = "__codelineno-23-10" href = "#__codelineno-23-10" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "nx" > newArrayQueue< / 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" > arrayQueue< / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "nx" > arrayQueue< / 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 = "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-23-13" name = "__codelineno-23-13" href = "#__codelineno-23-13" > < / 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-23-14" name = "__codelineno-23-14" href = "#__codelineno-23-14" > < / 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-23-15" name = "__codelineno-23-15" href = "#__codelineno-23-15" > < / 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-23-16" name = "__codelineno-23-16" href = "#__codelineno-23-16" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-17" name = "__codelineno-23-17" href = "#__codelineno-23-17" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-23-18" name = "__codelineno-23-18" href = "#__codelineno-23-18" > < / a >
2023-02-09 04:43:20 +08:00
< a id = "__codelineno-23-19" name = "__codelineno-23-19" href = "#__codelineno-23-19" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-20" name = "__codelineno-23-20" href = "#__codelineno-23-20" > < / 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" > arrayQueue< / 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-23-21" name = "__codelineno-23-21" href = "#__codelineno-23-21" > < / 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-23-22" name = "__codelineno-23-22" href = "#__codelineno-23-22" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-23-23" name = "__codelineno-23-23" href = "#__codelineno-23-23" > < / a >
2023-02-09 04:43:20 +08:00
< a id = "__codelineno-23-24" name = "__codelineno-23-24" href = "#__codelineno-23-24" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-25" name = "__codelineno-23-25" href = "#__codelineno-23-25" > < / 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" > arrayQueue< / 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-23-26" name = "__codelineno-23-26" href = "#__codelineno-23-26" > < / 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-23-27" name = "__codelineno-23-27" href = "#__codelineno-23-27" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-23-28" name = "__codelineno-23-28" href = "#__codelineno-23-28" > < / a >
2023-02-09 04:43:20 +08:00
< a id = "__codelineno-23-29" name = "__codelineno-23-29" href = "#__codelineno-23-29" > < / a > < span class = "cm" > /* 入队 */< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-30" name = "__codelineno-23-30" href = "#__codelineno-23-30" > < / 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" > arrayQueue< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > push< / 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-23-31" name = "__codelineno-23-31" href = "#__codelineno-23-31" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当 rear == queCapacity 表示队列已满< / span >
< a id = "__codelineno-23-32" name = "__codelineno-23-32" href = "#__codelineno-23-32" > < / 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-23-33" name = "__codelineno-23-33" href = "#__codelineno-23-33" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span >
< a id = "__codelineno-23-34" name = "__codelineno-23-34" href = "#__codelineno-23-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-23-35" name = "__codelineno-23-35" href = "#__codelineno-23-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-23-36" name = "__codelineno-23-36" href = "#__codelineno-23-36" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
< a id = "__codelineno-23-37" name = "__codelineno-23-37" href = "#__codelineno-23-37" > < / a > < span class = "w" > < / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / 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 > < 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 >
2023-02-16 02:20:55 +08:00
< a id = "__codelineno-23-38" name = "__codelineno-23-38" href = "#__codelineno-23-38" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-39" name = "__codelineno-23-39" href = "#__codelineno-23-39" > < / 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-23-40" name = "__codelineno-23-40" href = "#__codelineno-23-40" > < / 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-23-41" name = "__codelineno-23-41" href = "#__codelineno-23-41" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-23-42" name = "__codelineno-23-42" href = "#__codelineno-23-42" > < / a >
2023-02-09 04:43:20 +08:00
< a id = "__codelineno-23-43" name = "__codelineno-23-43" href = "#__codelineno-23-43" > < / a > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-23-44" name = "__codelineno-23-44" href = "#__codelineno-23-44" > < / 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" > arrayQueue< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > any< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-45" name = "__codelineno-23-45" href = "#__codelineno-23-45" > < / 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" > peek< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-23-46" name = "__codelineno-23-46" href = "#__codelineno-23-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-23-47" name = "__codelineno-23-47" href = "#__codelineno-23-47" > < / 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 = "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 > < 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-23-48" name = "__codelineno-23-48" href = "#__codelineno-23-48" > < / 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-23-49" name = "__codelineno-23-49" href = "#__codelineno-23-49" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > num< / span >
< a id = "__codelineno-23-50" name = "__codelineno-23-50" href = "#__codelineno-23-50" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-23-51" name = "__codelineno-23-51" href = "#__codelineno-23-51" > < / a >
2023-02-09 04:43:20 +08:00
< a id = "__codelineno-23-52" name = "__codelineno-23-52" href = "#__codelineno-23-52" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-53" name = "__codelineno-23-53" href = "#__codelineno-23-53" > < / 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" > arrayQueue< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > peek< / 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-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 = "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-23-55" name = "__codelineno-23-55" href = "#__codelineno-23-55" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-23-56" name = "__codelineno-23-56" href = "#__codelineno-23-56" > < / a > < span class = "w" > < / 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 = "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-23-58" name = "__codelineno-23-58" href = "#__codelineno-23-58" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-23-59" name = "__codelineno-23-59" href = "#__codelineno-23-59" > < / a >
2023-02-09 04:43:20 +08:00
< a id = "__codelineno-23-60" name = "__codelineno-23-60" href = "#__codelineno-23-60" > < / a > < span class = "cm" > /* 获取 Slice 用于打印 */< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-23-61" name = "__codelineno-23-61" href = "#__codelineno-23-61" > < / 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" > arrayQueue< / 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-23-62" name = "__codelineno-23-62" href = "#__codelineno-23-62" > < / a > < span class = "w" > < / span > < span class = "nx" > rear< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / 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-23-63" name = "__codelineno-23-63" href = "#__codelineno-23-63" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < 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" > queCapacity< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-23-64" name = "__codelineno-23-64" href = "#__codelineno-23-64" > < / 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" > queCapacity< / span >
< a id = "__codelineno-23-65" name = "__codelineno-23-65" href = "#__codelineno-23-65" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nb" > append< / span > < span class = "p" > (< / 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 = "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 = "o" > ...< / span > < span class = "p" > )< / span >
< a id = "__codelineno-23-66" name = "__codelineno-23-66" href = "#__codelineno-23-66" > < / a > < 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 = "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 > < span class = "nx" > rear< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-23-68" name = "__codelineno-23-68" href = "#__codelineno-23-68" > < / a > < span class = "p" > }< / span >
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_queue.js< / span > < pre > < span > < / span > < code > < a id = "__codelineno-24-1" name = "__codelineno-24-1" href = "#__codelineno-24-1" > < / a > < span class = "cm" > /* 基于环形数组实现的队列 */< / span >
< a id = "__codelineno-24-2" name = "__codelineno-24-2" href = "#__codelineno-24-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > ArrayQueue< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-24-3" name = "__codelineno-24-3" href = "#__codelineno-24-3" > < / 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" > // 用于存储队列元素的数组< / span >
< a id = "__codelineno-24-4" name = "__codelineno-24-4" href = "#__codelineno-24-4" > < / a > < span class = "w" > < / 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 > < span class = "w" > < / span > < span class = "c1" > // 队首指针，指向队首元素< / span >
< a id = "__codelineno-24-5" name = "__codelineno-24-5" href = "#__codelineno-24-5" > < / a > < span class = "w" > < / 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 = "c1" > // 队列长度< / span >
< a id = "__codelineno-24-6" name = "__codelineno-24-6" href = "#__codelineno-24-6" > < / a >
< a id = "__codelineno-24-7" name = "__codelineno-24-7" href = "#__codelineno-24-7" > < / 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-24-8" name = "__codelineno-24-8" href = "#__codelineno-24-8" > < / 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-24-9" name = "__codelineno-24-9" href = "#__codelineno-24-9" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-10" name = "__codelineno-24-10" href = "#__codelineno-24-10" > < / a >
< a id = "__codelineno-24-11" name = "__codelineno-24-11" href = "#__codelineno-24-11" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的容量 */< / span >
< a id = "__codelineno-24-12" name = "__codelineno-24-12" href = "#__codelineno-24-12" > < / a > < span class = "w" > < / span > < span class = "nx" > get< / span > < span class = "w" > < / span > < span class = "nx" > capacity< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-24-13" name = "__codelineno-24-13" href = "#__codelineno-24-13" > < / 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-24-14" name = "__codelineno-24-14" href = "#__codelineno-24-14" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-15" name = "__codelineno-24-15" href = "#__codelineno-24-15" > < / a >
< a id = "__codelineno-24-16" name = "__codelineno-24-16" href = "#__codelineno-24-16" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-24-17" name = "__codelineno-24-17" href = "#__codelineno-24-17" > < / a > < span class = "w" > < / span > < span class = "nx" > get< / span > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-24-18" name = "__codelineno-24-18" href = "#__codelineno-24-18" > < / 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-24-19" name = "__codelineno-24-19" href = "#__codelineno-24-19" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-20" name = "__codelineno-24-20" href = "#__codelineno-24-20" > < / a >
< a id = "__codelineno-24-21" name = "__codelineno-24-21" href = "#__codelineno-24-21" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-24-22" name = "__codelineno-24-22" href = "#__codelineno-24-22" > < / a > < span class = "w" > < / span > < span class = "nx" > empty< / span > < span class = "p" > ()< / span > < span class = "w" > < / 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 = "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-24-24" name = "__codelineno-24-24" href = "#__codelineno-24-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-25" name = "__codelineno-24-25" href = "#__codelineno-24-25" > < / a >
< a id = "__codelineno-24-26" name = "__codelineno-24-26" href = "#__codelineno-24-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-24-27" name = "__codelineno-24-27" href = "#__codelineno-24-27" > < / a > < span class = "w" > < / span > < span class = "nx" > push< / 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-24-28" name = "__codelineno-24-28" href = "#__codelineno-24-28" > < / 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" > size< / 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-24-29" name = "__codelineno-24-29" href = "#__codelineno-24-29" > < / 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 = "s2" > " 队列已满" < / 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 = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-24-31" name = "__codelineno-24-31" href = "#__codelineno-24-31" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-32" name = "__codelineno-24-32" href = "#__codelineno-24-32" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-24-33" name = "__codelineno-24-33" href = "#__codelineno-24-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
< a id = "__codelineno-24-34" name = "__codelineno-24-34" href = "#__codelineno-24-34" > < / 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 = "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 = "nx" > size< / 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 >
2023-02-16 02:20:55 +08:00
< a id = "__codelineno-24-35" name = "__codelineno-24-35" href = "#__codelineno-24-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-24-36" name = "__codelineno-24-36" href = "#__codelineno-24-36" > < / 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-24-37" name = "__codelineno-24-37" href = "#__codelineno-24-37" > < / 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-24-38" name = "__codelineno-24-38" href = "#__codelineno-24-38" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-39" name = "__codelineno-24-39" href = "#__codelineno-24-39" > < / a >
< a id = "__codelineno-24-40" name = "__codelineno-24-40" href = "#__codelineno-24-40" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-24-41" name = "__codelineno-24-41" href = "#__codelineno-24-41" > < / a > < span class = "w" > < / span > < span class = "nx" > pop< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-24-42" name = "__codelineno-24-42" href = "#__codelineno-24-42" > < / 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" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-24-43" name = "__codelineno-24-43" href = "#__codelineno-24-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-24-44" name = "__codelineno-24-44" href = "#__codelineno-24-44" > < / 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 = "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 > < 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-24-45" name = "__codelineno-24-45" href = "#__codelineno-24-45" > < / 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-24-46" name = "__codelineno-24-46" href = "#__codelineno-24-46" > < / 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-24-47" name = "__codelineno-24-47" href = "#__codelineno-24-47" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-48" name = "__codelineno-24-48" href = "#__codelineno-24-48" > < / a >
< a id = "__codelineno-24-49" name = "__codelineno-24-49" href = "#__codelineno-24-49" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-24-50" name = "__codelineno-24-50" href = "#__codelineno-24-50" > < / a > < span class = "w" > < / span > < span class = "nx" > peek< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-24-51" name = "__codelineno-24-51" href = "#__codelineno-24-51" > < / 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" > empty< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-24-52" name = "__codelineno-24-52" href = "#__codelineno-24-52" > < / a > < 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 = "s2" > " 队列为空" < / 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 = "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-24-54" name = "__codelineno-24-54" href = "#__codelineno-24-54" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-02-08 16:47:58 +08:00
< a id = "__codelineno-24-55" name = "__codelineno-24-55" href = "#__codelineno-24-55" > < / a >
< a id = "__codelineno-24-56" name = "__codelineno-24-56" href = "#__codelineno-24-56" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回 Array */< / span >
< a id = "__codelineno-24-57" name = "__codelineno-24-57" href = "#__codelineno-24-57" > < / 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-24-58" name = "__codelineno-24-58" href = "#__codelineno-24-58" > < / 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-24-59" name = "__codelineno-24-59" href = "#__codelineno-24-59" > < / 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 = "ow" > new< / span > < span class = "w" > < / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "p" > );< / span >
< a id = "__codelineno-24-60" name = "__codelineno-24-60" href = "#__codelineno-24-60" > < / 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 = "nx" > size< / 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-24-61" name = "__codelineno-24-61" href = "#__codelineno-24-61" > < / a > < span class = "w" > < / span > < span class = "nx" > arr< / 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 = "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" > capacity< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-24-62" name = "__codelineno-24-62" href = "#__codelineno-24-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-63" name = "__codelineno-24-63" href = "#__codelineno-24-63" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-24-64" name = "__codelineno-24-64" href = "#__codelineno-24-64" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-24-65" name = "__codelineno-24-65" href = "#__codelineno-24-65" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_queue.ts< / 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队列 */< / span >
< a id = "__codelineno-25-2" name = "__codelineno-25-2" href = "#__codelineno-25-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nx" > ArrayQueue< / 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 = "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 = "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-25-5" name = "__codelineno-25-5" href = "#__codelineno-25-5" > < / 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" > // 队列长度< / span >
< a id = "__codelineno-25-6" name = "__codelineno-25-6" href = "#__codelineno-25-6" > < / a >
< a id = "__codelineno-25-7" name = "__codelineno-25-7" href = "#__codelineno-25-7" > < / 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-25-8" name = "__codelineno-25-8" href = "#__codelineno-25-8" > < / 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-25-9" name = "__codelineno-25-9" href = "#__codelineno-25-9" > < / 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" > 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-25-10" name = "__codelineno-25-10" href = "#__codelineno-25-10" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-11" name = "__codelineno-25-11" href = "#__codelineno-25-11" > < / a >
< a id = "__codelineno-25-12" name = "__codelineno-25-12" href = "#__codelineno-25-12" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的容量 */< / span >
< a id = "__codelineno-25-13" name = "__codelineno-25-13" href = "#__codelineno-25-13" > < / a > < span class = "w" > < / span > < span class = "nx" > get< / span > < 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-25-14" name = "__codelineno-25-14" href = "#__codelineno-25-14" > < / 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-25-15" name = "__codelineno-25-15" href = "#__codelineno-25-15" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-16" name = "__codelineno-25-16" href = "#__codelineno-25-16" > < / a >
< a id = "__codelineno-25-17" name = "__codelineno-25-17" href = "#__codelineno-25-17" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-25-18" name = "__codelineno-25-18" href = "#__codelineno-25-18" > < / a > < span class = "w" > < / span > < span class = "nx" > get< / span > < 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-25-19" name = "__codelineno-25-19" href = "#__codelineno-25-19" > < / 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-25-20" name = "__codelineno-25-20" href = "#__codelineno-25-20" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-21" name = "__codelineno-25-21" href = "#__codelineno-25-21" > < / a >
< a id = "__codelineno-25-22" name = "__codelineno-25-22" href = "#__codelineno-25-22" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-25-23" name = "__codelineno-25-23" href = "#__codelineno-25-23" > < / a > < span class = "w" > < / span > < span class = "nx" > empty< / 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-25-24" name = "__codelineno-25-24" href = "#__codelineno-25-24" > < / 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-25-25" name = "__codelineno-25-25" href = "#__codelineno-25-25" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-26" name = "__codelineno-25-26" href = "#__codelineno-25-26" > < / a >
< a id = "__codelineno-25-27" name = "__codelineno-25-27" href = "#__codelineno-25-27" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-25-28" name = "__codelineno-25-28" href = "#__codelineno-25-28" > < / a > < span class = "w" > < / span > < span class = "nx" > push< / 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-25-29" name = "__codelineno-25-29" href = "#__codelineno-25-29" > < / 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" > size< / 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-25-30" name = "__codelineno-25-30" href = "#__codelineno-25-30" > < / 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 = "s2" > " 队列已满" < / 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 = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-25-32" name = "__codelineno-25-32" href = "#__codelineno-25-32" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-33" name = "__codelineno-25-33" href = "#__codelineno-25-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-25-34" name = "__codelineno-25-34" href = "#__codelineno-25-34" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
< a id = "__codelineno-25-35" name = "__codelineno-25-35" href = "#__codelineno-25-35" > < / 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 = "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 > < 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 >
2023-02-16 02:20:55 +08:00
< a id = "__codelineno-25-36" name = "__codelineno-25-36" href = "#__codelineno-25-36" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-25-37" name = "__codelineno-25-37" href = "#__codelineno-25-37" > < / 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-25-38" name = "__codelineno-25-38" href = "#__codelineno-25-38" > < / 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-25-39" name = "__codelineno-25-39" href = "#__codelineno-25-39" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-40" name = "__codelineno-25-40" href = "#__codelineno-25-40" > < / a >
< a id = "__codelineno-25-41" name = "__codelineno-25-41" href = "#__codelineno-25-41" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-25-42" name = "__codelineno-25-42" href = "#__codelineno-25-42" > < / a > < span class = "w" > < / span > < span class = "nx" > pop< / 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 >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-25-43" name = "__codelineno-25-43" href = "#__codelineno-25-43" > < / 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" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-25-44" name = "__codelineno-25-44" href = "#__codelineno-25-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-25-45" name = "__codelineno-25-45" href = "#__codelineno-25-45" > < / 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 = "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 > < 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-25-46" name = "__codelineno-25-46" href = "#__codelineno-25-46" > < / 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-25-47" name = "__codelineno-25-47" href = "#__codelineno-25-47" > < / 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-25-48" name = "__codelineno-25-48" href = "#__codelineno-25-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-49" name = "__codelineno-25-49" href = "#__codelineno-25-49" > < / a >
< a id = "__codelineno-25-50" name = "__codelineno-25-50" href = "#__codelineno-25-50" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-25-51" name = "__codelineno-25-51" href = "#__codelineno-25-51" > < / a > < span class = "w" > < / span > < span class = "nx" > peek< / 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-25-52" name = "__codelineno-25-52" href = "#__codelineno-25-52" > < / 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" > empty< / 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" > 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 = "s2" > " 队列为空" < / 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 = "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-25-55" name = "__codelineno-25-55" href = "#__codelineno-25-55" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-02-08 16:47:58 +08:00
< a id = "__codelineno-25-56" name = "__codelineno-25-56" href = "#__codelineno-25-56" > < / a >
< a id = "__codelineno-25-57" name = "__codelineno-25-57" href = "#__codelineno-25-57" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回 Array */< / span >
< a id = "__codelineno-25-58" name = "__codelineno-25-58" href = "#__codelineno-25-58" > < / 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-25-59" name = "__codelineno-25-59" href = "#__codelineno-25-59" > < / 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-25-60" name = "__codelineno-25-60" href = "#__codelineno-25-60" > < / 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 = "ow" > new< / span > < span class = "w" > < / span > < span class = "nb" > Array< / span > < span class = "p" > (< / span > < span class = "k" > this< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "p" > );< / span >
< a id = "__codelineno-25-61" name = "__codelineno-25-61" href = "#__codelineno-25-61" > < / 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" > size< / 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-25-62" name = "__codelineno-25-62" href = "#__codelineno-25-62" > < / a > < span class = "w" > < / span > < span class = "nx" > arr< / 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 = "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" > capacity< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-25-63" name = "__codelineno-25-63" href = "#__codelineno-25-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-64" name = "__codelineno-25-64" href = "#__codelineno-25-64" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > arr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-25-65" name = "__codelineno-25-65" href = "#__codelineno-25-65" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-25-66" name = "__codelineno-25-66" href = "#__codelineno-25-66" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-02-11 18:21:51 +08:00
< div class = "highlight" > < span class = "filename" > array_queue.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-26-1" name = "__codelineno-26-1" href = "#__codelineno-26-1" > < / a > < span class = "p" > [< / span > < span class = "n" > class< / span > < span class = "p" > ]{< / span > < span class = "n" > arrayQueue< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "n" > func< / span > < span class = "p" > ]{}< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_queue.cs< / 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队列 */< / span >
< a id = "__codelineno-27-2" name = "__codelineno-27-2" href = "#__codelineno-27-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > ArrayQueue< / span >
< a id = "__codelineno-27-3" name = "__codelineno-27-3" href = "#__codelineno-27-3" > < / a > < span class = "p" > {< / 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 = "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" > // 用于存储队列元素的数组< / 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 = "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-27-6" name = "__codelineno-27-6" href = "#__codelineno-27-6" > < / 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" > // 队列长度< / span >
< a id = "__codelineno-27-7" name = "__codelineno-27-7" href = "#__codelineno-27-7" > < / a >
< a id = "__codelineno-27-8" name = "__codelineno-27-8" href = "#__codelineno-27-8" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "nf" > ArrayQueue< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / 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 = "p" > {< / span >
< a id = "__codelineno-27-10" name = "__codelineno-27-10" href = "#__codelineno-27-10" > < / a > < span class = "w" > < / 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-27-11" name = "__codelineno-27-11" href = "#__codelineno-27-11" > < / 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-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 = "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 >
< a id = "__codelineno-27-16" name = "__codelineno-27-16" href = "#__codelineno-27-16" > < / a > < span class = "w" > < / 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 = "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-27-18" name = "__codelineno-27-18" href = "#__codelineno-27-18" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-19" name = "__codelineno-27-19" href = "#__codelineno-27-19" > < / a >
< a id = "__codelineno-27-20" name = "__codelineno-27-20" href = "#__codelineno-27-20" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-27-21" name = "__codelineno-27-21" href = "#__codelineno-27-21" > < / 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 >
< 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 > < 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-27-24" name = "__codelineno-27-24" href = "#__codelineno-27-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-25" name = "__codelineno-27-25" href = "#__codelineno-27-25" > < / a >
< a id = "__codelineno-27-26" name = "__codelineno-27-26" href = "#__codelineno-27-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-27-27" name = "__codelineno-27-27" href = "#__codelineno-27-27" > < / 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 >
< a id = "__codelineno-27-28" name = "__codelineno-27-28" href = "#__codelineno-27-28" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-29" name = "__codelineno-27-29" href = "#__codelineno-27-29" > < / 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-27-30" name = "__codelineno-27-30" href = "#__codelineno-27-30" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-27-31" name = "__codelineno-27-31" href = "#__codelineno-27-31" > < / a >
< a id = "__codelineno-27-32" name = "__codelineno-27-32" href = "#__codelineno-27-32" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 入队 */< / span >
< a id = "__codelineno-27-33" name = "__codelineno-27-33" href = "#__codelineno-27-33" > < / 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" > push< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > num< / span > < span class = "p" > )< / span >
< a id = "__codelineno-27-34" name = "__codelineno-27-34" href = "#__codelineno-27-34" > < / a > < span class = "w" > < / 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 = "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 >
< a id = "__codelineno-27-36" name = "__codelineno-27-36" href = "#__codelineno-27-36" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-37" name = "__codelineno-27-37" href = "#__codelineno-27-37" > < / 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" > " 队列已满" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-27-38" name = "__codelineno-27-38" href = "#__codelineno-27-38" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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 = "p" > }< / span >
< a id = "__codelineno-27-40" name = "__codelineno-27-40" href = "#__codelineno-27-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-27-41" name = "__codelineno-27-41" href = "#__codelineno-27-41" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
< a id = "__codelineno-27-42" name = "__codelineno-27-42" href = "#__codelineno-27-42" > < / 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 = "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 > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ();< / span >
2023-02-16 02:20:55 +08:00
< a id = "__codelineno-27-43" name = "__codelineno-27-43" href = "#__codelineno-27-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
2023-02-08 14:54:41 +08:00
< a id = "__codelineno-27-44" name = "__codelineno-27-44" href = "#__codelineno-27-44" > < / 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-27-45" name = "__codelineno-27-45" href = "#__codelineno-27-45" > < / a > < span class = "w" > < / span > < span class = "n" > queSize< / span > < span class = "o" > ++< / 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 = "p" > }< / span >
< a id = "__codelineno-27-47" name = "__codelineno-27-47" href = "#__codelineno-27-47" > < / a >
< a id = "__codelineno-27-48" name = "__codelineno-27-48" href = "#__codelineno-27-48" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 出队 */< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-27-49" name = "__codelineno-27-49" href = "#__codelineno-27-49" > < / 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" > pop< / span > < span class = "p" > ()< / span >
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< a id = "__codelineno-27-50" name = "__codelineno-27-50" href = "#__codelineno-27-50" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-51" name = "__codelineno-27-51" href = "#__codelineno-27-51" > < / 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" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-27-52" name = "__codelineno-27-52" href = "#__codelineno-27-52" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-27-53" name = "__codelineno-27-53" href = "#__codelineno-27-53" > < / a > < span class = "w" > < / span > < span class = "n" > front< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "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 > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "n" > capacity< / 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 = "n" > queSize< / span > < span class = "o" > --< / 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 = "w" > < / span > < span class = "n" > num< / 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 >
< a id = "__codelineno-27-58" name = "__codelineno-27-58" href = "#__codelineno-27-58" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-27-59" name = "__codelineno-27-59" href = "#__codelineno-27-59" > < / 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" > peek< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-27-60" name = "__codelineno-27-60" href = "#__codelineno-27-60" > < / a > < span class = "w" > < / 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" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > isEmpty< / 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 = "k" > throw< / span > < span class = "w" > < / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "nf" > Exception< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-27-63" name = "__codelineno-27-63" href = "#__codelineno-27-63" > < / 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-27-64" name = "__codelineno-27-64" href = "#__codelineno-27-64" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-27-65" name = "__codelineno-27-65" href = "#__codelineno-27-65" > < / a >
< a id = "__codelineno-27-66" name = "__codelineno-27-66" href = "#__codelineno-27-66" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 返回数组 */< / span >
< a id = "__codelineno-27-67" name = "__codelineno-27-67" href = "#__codelineno-27-67" > < / 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 >
< a id = "__codelineno-27-68" name = "__codelineno-27-68" href = "#__codelineno-27-68" > < / a > < span class = "w" > < / 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 = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-27-70" name = "__codelineno-27-70" href = "#__codelineno-27-70" > < / 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-27-71" name = "__codelineno-27-71" href = "#__codelineno-27-71" > < / 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 >
< a id = "__codelineno-27-72" name = "__codelineno-27-72" href = "#__codelineno-27-72" > < / a > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-27-73" name = "__codelineno-27-73" href = "#__codelineno-27-73" > < / 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" > 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 = "n" > capacity< / span > < span class = "p" > ()];< / span >
< a id = "__codelineno-27-74" name = "__codelineno-27-74" href = "#__codelineno-27-74" > < / a > < 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > res< / 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 = "p" > }< / span >
< a id = "__codelineno-27-77" name = "__codelineno-27-77" href = "#__codelineno-27-77" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
< div class = "highlight" > < span class = "filename" > array_queue.swift< / 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队列 */< / span >
< a id = "__codelineno-28-2" name = "__codelineno-28-2" href = "#__codelineno-28-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > ArrayQueue< / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-3" name = "__codelineno-28-3" href = "#__codelineno-28-3" > < / 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" > // 用于存储队列元素的数组< / span >
< a id = "__codelineno-28-4" name = "__codelineno-28-4" href = "#__codelineno-28-4" > < / a > < span class = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > front< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / 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 = "kd" > private< / span > < span class = "kd" > var< / span > < span class = "nv" > queSize< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span > < span class = "c1" > // 队列长度< / span >
< a id = "__codelineno-28-6" name = "__codelineno-28-6" href = "#__codelineno-28-6" > < / a >
< a id = "__codelineno-28-7" name = "__codelineno-28-7" href = "#__codelineno-28-7" > < / 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-28-8" name = "__codelineno-28-8" href = "#__codelineno-28-8" > < / a > < span class = "c1" > // 初始化数组< / span >
< a id = "__codelineno-28-9" name = "__codelineno-28-9" href = "#__codelineno-28-9" > < / 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-28-10" name = "__codelineno-28-10" href = "#__codelineno-28-10" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-11" name = "__codelineno-28-11" href = "#__codelineno-28-11" > < / a >
< a id = "__codelineno-28-12" name = "__codelineno-28-12" href = "#__codelineno-28-12" > < / a > < span class = "cm" > /* 获取队列的容量 */< / span >
< a id = "__codelineno-28-13" name = "__codelineno-28-13" href = "#__codelineno-28-13" > < / 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-28-14" name = "__codelineno-28-14" href = "#__codelineno-28-14" > < / a > < span class = "n" > nums< / span > < span class = "p" > .< / span > < span class = "bp" > count< / span >
< a id = "__codelineno-28-15" name = "__codelineno-28-15" href = "#__codelineno-28-15" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-16" name = "__codelineno-28-16" href = "#__codelineno-28-16" > < / a >
< a id = "__codelineno-28-17" name = "__codelineno-28-17" href = "#__codelineno-28-17" > < / a > < span class = "cm" > /* 获取队列的长度 */< / span >
< a id = "__codelineno-28-18" name = "__codelineno-28-18" href = "#__codelineno-28-18" > < / 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-28-19" name = "__codelineno-28-19" href = "#__codelineno-28-19" > < / a > < span class = "n" > queSize< / span >
< a id = "__codelineno-28-20" name = "__codelineno-28-20" href = "#__codelineno-28-20" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-21" name = "__codelineno-28-21" href = "#__codelineno-28-21" > < / a >
< a id = "__codelineno-28-22" name = "__codelineno-28-22" href = "#__codelineno-28-22" > < / a > < span class = "cm" > /* 判断队列是否为空 */< / span >
< a id = "__codelineno-28-23" name = "__codelineno-28-23" href = "#__codelineno-28-23" > < / 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-28-24" name = "__codelineno-28-24" href = "#__codelineno-28-24" > < / a > < span class = "n" > queSize< / span > < span class = "p" > ==< / span > < span class = "mi" > 0< / 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" > /* 入队 */< / span >
< a id = "__codelineno-28-28" name = "__codelineno-28-28" href = "#__codelineno-28-28" > < / a > < 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 = "p" > {< / span >
< a id = "__codelineno-28-29" name = "__codelineno-28-29" href = "#__codelineno-28-29" > < / 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-28-30" name = "__codelineno-28-30" href = "#__codelineno-28-30" > < / a > < span class = "bp" > print< / span > < span class = "p" > (< / span > < span class = "s" > " 队列已满" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-28-31" name = "__codelineno-28-31" href = "#__codelineno-28-31" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-28-32" name = "__codelineno-28-32" href = "#__codelineno-28-32" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-33" name = "__codelineno-28-33" href = "#__codelineno-28-33" > < / a > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-28-34" name = "__codelineno-28-34" href = "#__codelineno-28-34" > < / a > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
< a id = "__codelineno-28-35" name = "__codelineno-28-35" href = "#__codelineno-28-35" > < / a > < span class = "kd" > let< / span > < span class = "nv" > rear< / span > < span class = "p" > =< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "o" > +< / span > < span class = "n" > queSize< / span > < span class = "p" > )< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span >
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< a id = "__codelineno-28-36" name = "__codelineno-28-36" href = "#__codelineno-28-36" > < / a > < span class = "c1" > // 将 num 添加至队尾< / span >
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< a id = "__codelineno-28-37" name = "__codelineno-28-37" href = "#__codelineno-28-37" > < / 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-28-38" name = "__codelineno-28-38" href = "#__codelineno-28-38" > < / a > < span class = "n" > queSize< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-28-39" name = "__codelineno-28-39" href = "#__codelineno-28-39" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-40" name = "__codelineno-28-40" href = "#__codelineno-28-40" > < / a >
< a id = "__codelineno-28-41" name = "__codelineno-28-41" href = "#__codelineno-28-41" > < / a > < span class = "cm" > /* 出队 */< / span >
< a id = "__codelineno-28-42" name = "__codelineno-28-42" href = "#__codelineno-28-42" > < / a > < span class = "p" > @< / span > < span class = "n" > discardableResult< / span >
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< a id = "__codelineno-28-43" name = "__codelineno-28-43" href = "#__codelineno-28-43" > < / a > < span class = "kd" > func< / span > < span class = "nf" > pop< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
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< a id = "__codelineno-28-44" name = "__codelineno-28-44" href = "#__codelineno-28-44" > < / a > < span class = "kd" > let< / span > < span class = "nv" > num< / span > < span class = "p" > =< / span > < span class = "n" > peek< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-28-45" name = "__codelineno-28-45" href = "#__codelineno-28-45" > < / a > < span class = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-28-46" name = "__codelineno-28-46" href = "#__codelineno-28-46" > < / a > < span class = "n" > front< / span > < span class = "p" > =< / span > < span class = "p" > (< / span > < span class = "n" > front< / span > < span class = "o" > +< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-28-47" name = "__codelineno-28-47" href = "#__codelineno-28-47" > < / a > < span class = "n" > queSize< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-28-48" name = "__codelineno-28-48" href = "#__codelineno-28-48" > < / a > < span class = "k" > return< / span > < span class = "n" > num< / span >
< a id = "__codelineno-28-49" name = "__codelineno-28-49" href = "#__codelineno-28-49" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-50" name = "__codelineno-28-50" href = "#__codelineno-28-50" > < / a >
< a id = "__codelineno-28-51" name = "__codelineno-28-51" href = "#__codelineno-28-51" > < / a > < span class = "cm" > /* 访问队首元素 */< / span >
< a id = "__codelineno-28-52" name = "__codelineno-28-52" href = "#__codelineno-28-52" > < / a > < span class = "kd" > func< / span > < span class = "nf" > peek< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-53" name = "__codelineno-28-53" href = "#__codelineno-28-53" > < / a > < span class = "k" > if< / span > < span class = "bp" > isEmpty< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-28-54" name = "__codelineno-28-54" href = "#__codelineno-28-54" > < / a > < span class = "bp" > fatalError< / span > < span class = "p" > (< / span > < span class = "s" > " 队列为空" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-28-55" name = "__codelineno-28-55" href = "#__codelineno-28-55" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-56" name = "__codelineno-28-56" href = "#__codelineno-28-56" > < / 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-28-57" name = "__codelineno-28-57" href = "#__codelineno-28-57" > < / a > < span class = "p" > }< / span >
2023-02-08 20:30:33 +08:00
< a id = "__codelineno-28-58" name = "__codelineno-28-58" href = "#__codelineno-28-58" > < / a >
< a id = "__codelineno-28-59" name = "__codelineno-28-59" href = "#__codelineno-28-59" > < / a > < span class = "cm" > /* 返回数组 */< / span >
< a id = "__codelineno-28-60" name = "__codelineno-28-60" href = "#__codelineno-28-60" > < / 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-28-61" name = "__codelineno-28-61" href = "#__codelineno-28-61" > < / a > < span class = "c1" > // 仅转换有效长度范围内的列表元素< / span >
< a id = "__codelineno-28-62" name = "__codelineno-28-62" href = "#__codelineno-28-62" > < / 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" > queSize< / span > < span class = "p" > )< / span >
< a id = "__codelineno-28-63" name = "__codelineno-28-63" href = "#__codelineno-28-63" > < / 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" > queSize< / 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-28-64" name = "__codelineno-28-64" href = "#__codelineno-28-64" > < / 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" > j< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span > < span class = "p" > ()]< / span >
< a id = "__codelineno-28-65" name = "__codelineno-28-65" href = "#__codelineno-28-65" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-66" name = "__codelineno-28-66" href = "#__codelineno-28-66" > < / a > < span class = "k" > return< / span > < span class = "n" > res< / span >
< a id = "__codelineno-28-67" name = "__codelineno-28-67" href = "#__codelineno-28-67" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-28-68" name = "__codelineno-28-68" href = "#__codelineno-28-68" > < / a > < span class = "p" > }< / span >
2023-02-08 14:54:41 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-02-09 22:55:35 +08:00
< div class = "highlight" > < span class = "filename" > array_queue.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-29-1" name = "__codelineno-29-1" href = "#__codelineno-29-1" > < / a > < span class = "c1" > // 基于环形数组实现的队列< / span >
< a id = "__codelineno-29-2" name = "__codelineno-29-2" href = "#__codelineno-29-2" > < / a > < span class = "k" > fn< / span > < span class = "w" > < / span > < span class = "n" > ArrayQueue< / 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-29-3" name = "__codelineno-29-3" href = "#__codelineno-29-3" > < / 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-29-4" name = "__codelineno-29-4" href = "#__codelineno-29-4" > < / 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-29-5" name = "__codelineno-29-5" href = "#__codelineno-29-5" > < / a >
< a id = "__codelineno-29-6" name = "__codelineno-29-6" href = "#__codelineno-29-6" > < / a > < span class = "w" > < / span > < span class = "n" > nums< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "p" > []< / 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" > // 用于存储队列元素的数组 < / span >
< a id = "__codelineno-29-7" name = "__codelineno-29-7" href = "#__codelineno-29-7" > < / a > < span class = "w" > < / span > < span class = "n" > cap< / 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" > // 队列容量< / span >
< a id = "__codelineno-29-8" name = "__codelineno-29-8" href = "#__codelineno-29-8" > < / a > < span class = "w" > < / span > < span class = "n" > front< / 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" > // 队首指针，指向队首元素< / span >
2023-03-15 03:13:04 +08:00
< a id = "__codelineno-29-9" name = "__codelineno-29-9" href = "#__codelineno-29-9" > < / 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" > // 尾指针，指向队尾 + 1< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-10" name = "__codelineno-29-10" href = "#__codelineno-29-10" > < / 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-29-11" name = "__codelineno-29-11" href = "#__codelineno-29-11" > < / 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-29-12" name = "__codelineno-29-12" href = "#__codelineno-29-12" > < / a >
2023-02-10 01:03:44 +08:00
< a id = "__codelineno-29-13" name = "__codelineno-29-13" href = "#__codelineno-29-13" > < / a > < span class = "w" > < / span > < span class = "c1" > // 构造方法（分配内存+初始化数组）< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-14" name = "__codelineno-29-14" href = "#__codelineno-29-14" > < / 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 = "n" > cap< / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "kt" > usize< / 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-29-15" name = "__codelineno-29-15" href = "#__codelineno-29-15" > < / 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-29-16" name = "__codelineno-29-16" href = "#__codelineno-29-16" > < / 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-29-17" name = "__codelineno-29-17" href = "#__codelineno-29-17" > < / 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-29-18" name = "__codelineno-29-18" href = "#__codelineno-29-18" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-19" name = "__codelineno-29-19" href = "#__codelineno-29-19" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > cap< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > cap< / 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 = "n" > self< / 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" > 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" > cap< / 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 = "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" > self< / span > < span class = "p" > .< / span > < span class = "n" > nums< / 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-29-22" name = "__codelineno-29-22" href = "#__codelineno-29-22" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-23" name = "__codelineno-29-23" href = "#__codelineno-29-23" > < / a >
2023-02-10 01:03:44 +08:00
< a id = "__codelineno-29-24" name = "__codelineno-29-24" href = "#__codelineno-29-24" > < / a > < span class = "w" > < / span > < span class = "c1" > // 析构方法（释放内存）< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-25" name = "__codelineno-29-25" href = "#__codelineno-29-25" > < / 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-29-26" name = "__codelineno-29-26" href = "#__codelineno-29-26" > < / 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-29-27" name = "__codelineno-29-27" href = "#__codelineno-29-27" > < / 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-29-28" name = "__codelineno-29-28" href = "#__codelineno-29-28" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-29" name = "__codelineno-29-29" href = "#__codelineno-29-29" > < / a >
< a id = "__codelineno-29-30" name = "__codelineno-29-30" href = "#__codelineno-29-30" > < / a > < span class = "w" > < / span > < span class = "c1" > // 获取队列的容量< / span >
< a id = "__codelineno-29-31" name = "__codelineno-29-31" href = "#__codelineno-29-31" > < / 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" > capacity< / 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-29-32" name = "__codelineno-29-32" href = "#__codelineno-29-32" > < / 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" > cap< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-33" name = "__codelineno-29-33" href = "#__codelineno-29-33" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-34" name = "__codelineno-29-34" href = "#__codelineno-29-34" > < / a >
< a id = "__codelineno-29-35" name = "__codelineno-29-35" href = "#__codelineno-29-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 获取队列的长度< / span >
< a id = "__codelineno-29-36" name = "__codelineno-29-36" href = "#__codelineno-29-36" > < / 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 >
2023-03-15 03:13:04 +08:00
< a id = "__codelineno-29-37" name = "__codelineno-29-37" href = "#__codelineno-29-37" > < / 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 >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-38" name = "__codelineno-29-38" href = "#__codelineno-29-38" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-39" name = "__codelineno-29-39" href = "#__codelineno-29-39" > < / a >
< a id = "__codelineno-29-40" name = "__codelineno-29-40" href = "#__codelineno-29-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 判断队列是否为空< / span >
< a id = "__codelineno-29-41" name = "__codelineno-29-41" href = "#__codelineno-29-41" > < / 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 >
2023-03-15 03:13:04 +08:00
< a id = "__codelineno-29-42" name = "__codelineno-29-42" href = "#__codelineno-29-42" > < / 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 = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-43" name = "__codelineno-29-43" href = "#__codelineno-29-43" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-44" name = "__codelineno-29-44" href = "#__codelineno-29-44" > < / a >
< a id = "__codelineno-29-45" name = "__codelineno-29-45" href = "#__codelineno-29-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 入队< / span >
< a id = "__codelineno-29-46" name = "__codelineno-29-46" href = "#__codelineno-29-46" > < / 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 = "o" > !< / span > < span class = "kt" > void< / span > < span class = "w" > < / 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 = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / 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 = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > capacity< / span > < span class = "p" > ())< / span > < span class = "w" > < / 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 = "n" > std< / span > < span class = "p" > .< / span > < span class = "n" > debug< / span > < span class = "p" > .< / span > < span class = "n" > print< / span > < span class = "p" > (< / span > < span class = "s" > " 队列已满< / span > < span class = "se" > \n< / span > < span class = "s" > " < / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "p" > .{});< / span >
< a id = "__codelineno-29-49" name = "__codelineno-29-49" href = "#__codelineno-29-49" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-29-50" name = "__codelineno-29-50" href = "#__codelineno-29-50" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-29-51" name = "__codelineno-29-51" href = "#__codelineno-29-51" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算尾指针，指向队尾索引 + 1< / span >
< a id = "__codelineno-29-52" name = "__codelineno-29-52" href = "#__codelineno-29-52" > < / a > < span class = "w" > < / span > < span class = "c1" > // 通过取余操作，实现 rear 越过数组尾部后回到头部< / span >
2023-03-15 03:13:04 +08:00
< a id = "__codelineno-29-53" name = "__codelineno-29-53" href = "#__codelineno-29-53" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > rear< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / 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" > self< / span > < span class = "p" > .< / span > < span class = "n" > que_size< / span > < span class = "p" > )< / 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" > capacity< / span > < span class = "p" > ();< / span >
2023-02-16 02:20:55 +08:00
< a id = "__codelineno-29-54" name = "__codelineno-29-54" href = "#__codelineno-29-54" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将 num 添加至队尾< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-55" name = "__codelineno-29-55" href = "#__codelineno-29-55" > < / a > < span class = "w" > < / span > < span class = "n" > self< / span > < span class = "p" > .< / 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 >
2023-03-15 03:13:04 +08:00
< a id = "__codelineno-29-56" name = "__codelineno-29-56" href = "#__codelineno-29-56" > < / 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 >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-57" name = "__codelineno-29-57" href = "#__codelineno-29-57" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-29-58" name = "__codelineno-29-58" href = "#__codelineno-29-58" > < / a >
< a id = "__codelineno-29-59" name = "__codelineno-29-59" href = "#__codelineno-29-59" > < / a > < span class = "w" > < / span > < span class = "c1" > // 出队< / span >
2023-03-13 21:51:34 +08:00
< a id = "__codelineno-29-60" name = "__codelineno-29-60" href = "#__codelineno-29-60" > < / 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" > T< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-61" name = "__codelineno-29-61" href = "#__codelineno-29-61" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / 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" > self< / span > < span class = "p" > .< / span > < span class = "n" > peek< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-29-62" name = "__codelineno-29-62" href = "#__codelineno-29-62" > < / a > < span class = "w" > < / span > < span class = "c1" > // 队首指针向后移动一位，若越过尾部则返回到数组头部< / span >
< a id = "__codelineno-29-63" name = "__codelineno-29-63" href = "#__codelineno-29-63" > < / 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 = "p" > (< / 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 = "mi" > 1< / span > < span class = "p" > )< / 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" > capacity< / span > < span class = "p" > ();< / span >
2023-03-15 03:13:04 +08:00
< a id = "__codelineno-29-64" name = "__codelineno-29-64" href = "#__codelineno-29-64" > < / 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 >
2023-02-09 22:55:35 +08:00
< a id = "__codelineno-29-65" name = "__codelineno-29-65" href = "#__codelineno-29-65" > < / 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-29-66" name = "__codelineno-29-66" href = "#__codelineno-29-66" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-29-67" name = "__codelineno-29-67" href = "#__codelineno-29-67" > < / a >
< a id = "__codelineno-29-68" name = "__codelineno-29-68" href = "#__codelineno-29-68" > < / a > < span class = "w" > < / span > < span class = "c1" > // 访问队首元素< / span >
< a id = "__codelineno-29-69" name = "__codelineno-29-69" href = "#__codelineno-29-69" > < / 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" > peek< / 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-29-70" name = "__codelineno-29-70" href = "#__codelineno-29-70" > < / 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" > " 队列为空" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-29-71" name = "__codelineno-29-71" href = "#__codelineno-29-71" > < / 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" > nums< / span > < span class = "p" > [< / span > < span class = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-29-72" name = "__codelineno-29-72" href = "#__codelineno-29-72" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span >
< a id = "__codelineno-29-73" name = "__codelineno-29-73" href = "#__codelineno-29-73" > < / a >
< a id = "__codelineno-29-74" name = "__codelineno-29-74" href = "#__codelineno-29-74" > < / a > < span class = "w" > < / span > < span class = "c1" > // 返回数组< / span >
< a id = "__codelineno-29-75" name = "__codelineno-29-75" href = "#__codelineno-29-75" > < / 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-29-76" name = "__codelineno-29-76" href = "#__codelineno-29-76" > < / 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-29-77" name = "__codelineno-29-77" href = "#__codelineno-29-77" > < / 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-29-78" name = "__codelineno-29-78" href = "#__codelineno-29-78" > < / 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-29-79" name = "__codelineno-29-79" href = "#__codelineno-29-79" > < / 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-29-80" name = "__codelineno-29-80" href = "#__codelineno-29-80" > < / a > < span class = "w" > < / span > < span class = "kr" > var< / span > < span class = "w" > < / span > < span class = "n" > j< / 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 = "n" > self< / span > < span class = "p" > .< / span > < span class = "n" > front< / 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" > 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" > 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 = "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 = "mi" > 1< / 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 = "mi" > 1< / span > < span class = "p" > ;< / span > < span class = "w" > < / 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 = "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" > self< / span > < span class = "p" > .< / 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" > self< / span > < span class = "p" > .< / span > < span class = "n" > capacity< / 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" > res< / 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 > < span class = "w" > < / span > < span class = "p" > };< / span >
< a id = "__codelineno-29-87" name = "__codelineno-29-87" href = "#__codelineno-29-87" > < / a > < span class = "p" > }< / span >
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< p > 以上实现的队列仍存在局限性，即长度不可变。不过这个问题很容易解决，我们可以将数组替换为列表（即动态数组），从而引入扩容机制。有兴趣的同学可以尝试自行实现。< / p >
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< h2 id = "523" > 5.2.3. 两种实现对比< a class = "headerlink" href = "#523" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 与栈的结论一致，在此不再赘述。< / p >
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< h2 id = "524" > 5.2.4. 队列典型应用< a class = "headerlink" href = "#524" title = "Permanent link" > ¶ < / a > < / h2 >
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< ul >
< li > < strong > 淘宝订单< / strong > 。购物者下单后，订单就被加入到队列之中，随后系统再根据顺序依次处理队列中的订单。在双十一时，在短时间内会产生海量的订单，如何处理「高并发」则是工程师们需要重点思考的问题。< / li >
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< li > < strong > 各种待办事项< / strong > 。任何需要实现“先来后到”的功能，例如打印机的任务队列、餐厅的出餐队列等等。< / li >
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