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< title > 6.2. （ ） < / title >
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6.2. 哈希冲突（ ）
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< a href = "../../chapter_preface/" > 0. 前言< / a >
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0. 前言
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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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< a href = "../../chapter_introduction/" > 1. 初识算法< / a >
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1. 初识算法
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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
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2.1. 算法效率评估
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2.2. 时间复杂度
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2.3. 空间复杂度
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2.4. 小结
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3. 数据结构
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3.1. 数据结构分类
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3.5. 小结
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4. 数组与链表
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4.1. 数组
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4.2. 链表
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4.3. 列表
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4.4. 小结
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5. 栈与队列
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5.1. 栈
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5.2. 队列
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5.3. 双向队列
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5.4. 小结
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6. 散列表
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6.1. 哈希表（ ）
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6.2. 哈希冲突（ ）
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6.2. 哈希冲突（ ）
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6.2.1. 链式地址
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6.2.2. 开放寻址
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6.4. 小结
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7. 树
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7.1. 二叉树
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7.2. 二叉树遍历
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7.3. 二叉树数组表示
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7.4. 二叉搜索树
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7.5. AVL 树 *
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7.6. 小结
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8. 堆
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8.1. 堆
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8.2. 建堆操作
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8.3. Top-K 问题（ ）
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8.4. 小结
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9. 图
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< a href = "../../chapter_graph/graph/" class = "md-nav__link" >
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9.1. 图
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< / li >
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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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9.3. 图的遍历
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9.4. 小结
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10. 搜索
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< a href = "../../chapter_searching/binary_search/" class = "md-nav__link" >
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11.8. 桶排序
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11.9. 计数排序
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11.10. 基数排序
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线性探测
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多次哈希
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< 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 >
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< h1 id = "62" > 6.2. 哈希冲突< a class = "headerlink" href = "#62" title = "Permanent link" > ¶ < / a > < / h1 >
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< p > 上节提到，< strong > 通常情况下哈希函数的输入空间远大于输出空间< / strong > ，因此哈希冲突是不可避免的。例如，输入空间为全体整数，输出空间为数组容量大小，则必然有多个整数映射至同一数组索引。< / p >
< p > 哈希冲突会导致查询结果错误，严重影响哈希表的可用性。为解决该问题，我们可以每当遇到哈希冲突时就进行哈希表扩容，直至冲突消失为止。此方法简单粗暴且有效，但效率太低，因为哈希表扩容需要进行大量的数据搬运与哈希值计算。为了提升效率，我们换一种思路：< / p >
< ol >
< li > 改良哈希表数据结构，< strong > 使得哈希表可以在存在哈希冲突时正常工作< / strong > 。< / li >
< li > 仅在必要时，即当哈希冲突比较严重时，执行扩容操作。< / li >
< / ol >
< p > 哈希表的结构改良方法主要包括链式地址和开放寻址。< / p >
< h2 id = "621" > 6.2.1. 链式地址< a class = "headerlink" href = "#621" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 在原始哈希表中，每个桶仅能存储一个键值对。「链式地址 Separate Chaining」将单个元素转换为链表， ， < / p >
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< p > < img alt = "链式地址哈希表" src = "../hash_collision.assets/hash_table_chaining.png" / > < / p >
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< p align = "center" > Fig. 链式地址哈希表 < / p >
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< p > 链式地址下，哈希表的操作方法包括：< / p >
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< ul >
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< li > < strong > 查询元素< / strong > ：输入 < code > key< / code > ，经过哈希函数得到数组索引，即可访问链表头节点，然后遍历链表并对比 < code > key< / code > 以查找目标键值对。< / li >
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< li > < strong > 添加元素< / strong > ：先通过哈希函数访问链表头节点，然后将节点（即键值对）添加到链表中。< / li >
< li > < strong > 删除元素< / strong > ：根据哈希函数的结果访问链表头部，接着遍历链表以查找目标节点，并将其删除。< / li >
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< / ul >
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< p > 该方法存在一些局限性，包括：< / p >
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< ul >
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< li > < strong > 占用空间增大< / strong > ，由于链表或二叉树包含节点指针，相比数组更加耗费内存空间；< / li >
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< li > < strong > 查询效率降低< / strong > ，因为需要线性遍历链表来查找对应元素；< / li >
< / ul >
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< p > 以下给出了链式地址哈希表的简单实现，需要注意：< / p >
< ul >
< li > 为了使得代码尽量简短，我们使用列表（动态数组）代替链表。换句话说，哈希表（数组）包含多个桶，每个桶都是一个列表。< / li >
< li > 以下代码实现了哈希表扩容方法。具体来看，当负载因子超过 < span class = "arithmatex" > \(0.75\)< / span > 时，我们将哈希表扩容至 < span class = "arithmatex" > \(2\)< / span > 倍。< / li >
< / ul >
< div class = "tabbed-set tabbed-alternate" data-tabs = "1:11" > < input checked = "checked" id = "__tabbed_1_1" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_2" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_3" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_4" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_5" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_6" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_7" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_8" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_9" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_10" name = "__tabbed_1" type = "radio" / > < input id = "__tabbed_1_11" name = "__tabbed_1" type = "radio" / > < div class = "tabbed-labels" > < label for = "__tabbed_1_1" > Java< / label > < label for = "__tabbed_1_2" > C++< / label > < label for = "__tabbed_1_3" > Python< / label > < label for = "__tabbed_1_4" > Go< / label > < label for = "__tabbed_1_5" > JavaScript< / label > < label for = "__tabbed_1_6" > TypeScript< / label > < label for = "__tabbed_1_7" > C< / label > < label for = "__tabbed_1_8" > C#< / label > < label for = "__tabbed_1_9" > Swift< / label > < label for = "__tabbed_1_10" > Zig< / label > < label for = "__tabbed_1_11" > Dart< / label > < / div >
< div class = "tabbed-content" >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-0-1" name = "__codelineno-0-1" href = "#__codelineno-0-1" > < / a > < span class = "cm" > /* 链式地址哈希表 */< / span >
< a id = "__codelineno-0-2" name = "__codelineno-0-2" href = "#__codelineno-0-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > HashMapChaining< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-3" name = "__codelineno-0-3" href = "#__codelineno-0-3" > < / 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 = "c1" > // 键值对数量< / span >
< a id = "__codelineno-0-4" name = "__codelineno-0-4" href = "#__codelineno-0-4" > < / 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 = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-0-5" name = "__codelineno-0-5" href = "#__codelineno-0-5" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-0-6" name = "__codelineno-0-6" href = "#__codelineno-0-6" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-0-7" name = "__codelineno-0-7" href = "#__codelineno-0-7" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-0-8" name = "__codelineno-0-8" href = "#__codelineno-0-8" > < / a >
< a id = "__codelineno-0-9" name = "__codelineno-0-9" href = "#__codelineno-0-9" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-0-10" name = "__codelineno-0-10" href = "#__codelineno-0-10" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "nf" > HashMapChaining< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-11" name = "__codelineno-0-11" href = "#__codelineno-0-11" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-12" name = "__codelineno-0-12" href = "#__codelineno-0-12" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 4< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-13" name = "__codelineno-0-13" href = "#__codelineno-0-13" > < / a > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "mf" > 3.0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-14" name = "__codelineno-0-14" href = "#__codelineno-0-14" > < / a > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-15" name = "__codelineno-0-15" href = "#__codelineno-0-15" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > ArrayList< / span > < span class = "o" > < > < / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-16" name = "__codelineno-0-16" href = "#__codelineno-0-16" > < / 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" > capacity< / 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-0-17" name = "__codelineno-0-17" href = "#__codelineno-0-17" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "na" > add< / span > < span class = "p" > (< / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > ArrayList< / span > < span class = "o" > < > < / span > < span class = "p" > ());< / span >
< a id = "__codelineno-0-18" name = "__codelineno-0-18" href = "#__codelineno-0-18" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-19" name = "__codelineno-0-19" href = "#__codelineno-0-19" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-20" name = "__codelineno-0-20" href = "#__codelineno-0-20" > < / a >
< a id = "__codelineno-0-21" name = "__codelineno-0-21" href = "#__codelineno-0-21" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-0-22" name = "__codelineno-0-22" href = "#__codelineno-0-22" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-23" name = "__codelineno-0-23" href = "#__codelineno-0-23" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-0-24" name = "__codelineno-0-24" href = "#__codelineno-0-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-25" name = "__codelineno-0-25" href = "#__codelineno-0-25" > < / a >
< a id = "__codelineno-0-26" name = "__codelineno-0-26" href = "#__codelineno-0-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-0-27" name = "__codelineno-0-27" href = "#__codelineno-0-27" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "nf" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-28" name = "__codelineno-0-28" href = "#__codelineno-0-28" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > double< / span > < span class = "p" > )< / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-29" name = "__codelineno-0-29" href = "#__codelineno-0-29" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-30" name = "__codelineno-0-30" href = "#__codelineno-0-30" > < / a >
< a id = "__codelineno-0-31" name = "__codelineno-0-31" href = "#__codelineno-0-31" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-0-32" name = "__codelineno-0-32" href = "#__codelineno-0-32" > < / a > < span class = "w" > < / span > < span class = "n" > String< / span > < span class = "w" > < / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-33" name = "__codelineno-0-33" href = "#__codelineno-0-33" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-34" name = "__codelineno-0-34" href = "#__codelineno-0-34" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "na" > get< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-35" name = "__codelineno-0-35" href = "#__codelineno-0-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若找到 key 则返回对应 val< / span >
< a id = "__codelineno-0-36" name = "__codelineno-0-36" href = "#__codelineno-0-36" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-37" name = "__codelineno-0-37" href = "#__codelineno-0-37" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-38" name = "__codelineno-0-38" href = "#__codelineno-0-38" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-39" name = "__codelineno-0-39" href = "#__codelineno-0-39" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-40" name = "__codelineno-0-40" href = "#__codelineno-0-40" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-41" name = "__codelineno-0-41" href = "#__codelineno-0-41" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若未找到 key 则返回 null< / span >
< a id = "__codelineno-0-42" name = "__codelineno-0-42" href = "#__codelineno-0-42" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-43" name = "__codelineno-0-43" href = "#__codelineno-0-43" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-44" name = "__codelineno-0-44" href = "#__codelineno-0-44" > < / a >
< a id = "__codelineno-0-45" name = "__codelineno-0-45" href = "#__codelineno-0-45" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-0-46" name = "__codelineno-0-46" href = "#__codelineno-0-46" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > String< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-47" name = "__codelineno-0-47" href = "#__codelineno-0-47" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-0-48" name = "__codelineno-0-48" href = "#__codelineno-0-48" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-49" name = "__codelineno-0-49" href = "#__codelineno-0-49" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-0-50" name = "__codelineno-0-50" href = "#__codelineno-0-50" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-51" name = "__codelineno-0-51" href = "#__codelineno-0-51" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-52" name = "__codelineno-0-52" href = "#__codelineno-0-52" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "na" > get< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-53" name = "__codelineno-0-53" href = "#__codelineno-0-53" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若遇到指定 key ，则更新对应 val 并返回< / span >
< a id = "__codelineno-0-54" name = "__codelineno-0-54" href = "#__codelineno-0-54" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-55" name = "__codelineno-0-55" href = "#__codelineno-0-55" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-56" name = "__codelineno-0-56" href = "#__codelineno-0-56" > < / a > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-57" name = "__codelineno-0-57" href = "#__codelineno-0-57" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-58" name = "__codelineno-0-58" href = "#__codelineno-0-58" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-59" name = "__codelineno-0-59" href = "#__codelineno-0-59" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-60" name = "__codelineno-0-60" href = "#__codelineno-0-60" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若无该 key ，则将键值对添加至尾部< / span >
< a id = "__codelineno-0-61" name = "__codelineno-0-61" href = "#__codelineno-0-61" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-62" name = "__codelineno-0-62" href = "#__codelineno-0-62" > < / a > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > .< / span > < span class = "na" > add< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-63" name = "__codelineno-0-63" href = "#__codelineno-0-63" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-64" name = "__codelineno-0-64" href = "#__codelineno-0-64" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-65" name = "__codelineno-0-65" href = "#__codelineno-0-65" > < / a >
< a id = "__codelineno-0-66" name = "__codelineno-0-66" href = "#__codelineno-0-66" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-0-67" name = "__codelineno-0-67" href = "#__codelineno-0-67" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-68" name = "__codelineno-0-68" href = "#__codelineno-0-68" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-69" name = "__codelineno-0-69" href = "#__codelineno-0-69" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "na" > get< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-70" name = "__codelineno-0-70" href = "#__codelineno-0-70" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-0-71" name = "__codelineno-0-71" href = "#__codelineno-0-71" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-72" name = "__codelineno-0-72" href = "#__codelineno-0-72" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-0-73" name = "__codelineno-0-73" href = "#__codelineno-0-73" > < / a > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > .< / span > < span class = "na" > remove< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-74" name = "__codelineno-0-74" href = "#__codelineno-0-74" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-75" name = "__codelineno-0-75" href = "#__codelineno-0-75" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-76" name = "__codelineno-0-76" href = "#__codelineno-0-76" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-77" name = "__codelineno-0-77" href = "#__codelineno-0-77" > < / a >
< a id = "__codelineno-0-78" name = "__codelineno-0-78" href = "#__codelineno-0-78" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-0-79" name = "__codelineno-0-79" href = "#__codelineno-0-79" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-80" name = "__codelineno-0-80" href = "#__codelineno-0-80" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-0-81" name = "__codelineno-0-81" href = "#__codelineno-0-81" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-82" name = "__codelineno-0-82" href = "#__codelineno-0-82" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-0-83" name = "__codelineno-0-83" href = "#__codelineno-0-83" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-84" name = "__codelineno-0-84" href = "#__codelineno-0-84" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > ArrayList< / span > < span class = "o" > < > < / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-85" name = "__codelineno-0-85" href = "#__codelineno-0-85" > < / 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" > capacity< / 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-0-86" name = "__codelineno-0-86" href = "#__codelineno-0-86" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "na" > add< / span > < span class = "p" > (< / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > ArrayList< / span > < span class = "o" > < > < / span > < span class = "p" > ());< / span >
< a id = "__codelineno-0-87" name = "__codelineno-0-87" href = "#__codelineno-0-87" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-88" name = "__codelineno-0-88" href = "#__codelineno-0-88" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-0-89" name = "__codelineno-0-89" href = "#__codelineno-0-89" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-0-90" name = "__codelineno-0-90" href = "#__codelineno-0-90" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-91" name = "__codelineno-0-91" href = "#__codelineno-0-91" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-92" name = "__codelineno-0-92" href = "#__codelineno-0-92" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-93" name = "__codelineno-0-93" href = "#__codelineno-0-93" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-94" name = "__codelineno-0-94" href = "#__codelineno-0-94" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-95" name = "__codelineno-0-95" href = "#__codelineno-0-95" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-96" name = "__codelineno-0-96" href = "#__codelineno-0-96" > < / a >
< a id = "__codelineno-0-97" name = "__codelineno-0-97" href = "#__codelineno-0-97" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-0-98" name = "__codelineno-0-98" href = "#__codelineno-0-98" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "nf" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-99" name = "__codelineno-0-99" href = "#__codelineno-0-99" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-100" name = "__codelineno-0-100" href = "#__codelineno-0-100" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > String< / 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 = "n" > ArrayList< / span > < span class = "o" > < > < / span > < span class = "p" > ();< / span >
< a id = "__codelineno-0-101" name = "__codelineno-0-101" href = "#__codelineno-0-101" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-0-102" name = "__codelineno-0-102" href = "#__codelineno-0-102" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "na" > add< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-0-103" name = "__codelineno-0-103" href = "#__codelineno-0-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-104" name = "__codelineno-0-104" href = "#__codelineno-0-104" > < / 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 = "n" > res< / span > < span class = "p" > );< / span >
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< a id = "__codelineno-0-105" name = "__codelineno-0-105" href = "#__codelineno-0-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-0-106" name = "__codelineno-0-106" href = "#__codelineno-0-106" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-0-107" name = "__codelineno-0-107" href = "#__codelineno-0-107" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-1-1" name = "__codelineno-1-1" href = "#__codelineno-1-1" > < / a > < span class = "cm" > /* 链式地址哈希表 */< / span >
< a id = "__codelineno-1-2" name = "__codelineno-1-2" href = "#__codelineno-1-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > HashMapChaining< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-3" name = "__codelineno-1-3" href = "#__codelineno-1-3" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "o" > :< / span >
< a id = "__codelineno-1-4" name = "__codelineno-1-4" href = "#__codelineno-1-4" > < / 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 = "c1" > // 键值对数量< / span >
< a id = "__codelineno-1-5" name = "__codelineno-1-5" href = "#__codelineno-1-5" > < / 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 = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-1-6" name = "__codelineno-1-6" href = "#__codelineno-1-6" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-1-7" name = "__codelineno-1-7" href = "#__codelineno-1-7" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-1-8" name = "__codelineno-1-8" href = "#__codelineno-1-8" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *> > < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-1-9" name = "__codelineno-1-9" href = "#__codelineno-1-9" > < / a >
< a id = "__codelineno-1-10" name = "__codelineno-1-10" href = "#__codelineno-1-10" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "o" > :< / span >
< a id = "__codelineno-1-11" name = "__codelineno-1-11" href = "#__codelineno-1-11" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-1-12" name = "__codelineno-1-12" href = "#__codelineno-1-12" > < / a > < span class = "w" > < / span > < span class = "n" > HashMapChaining< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > (< / span > < span class = "mi" > 0< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > (< / span > < span class = "mi" > 4< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > (< / span > < span class = "mf" > 2.0< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "mi" > 3< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > (< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-13" name = "__codelineno-1-13" href = "#__codelineno-1-13" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "n" > resize< / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-14" name = "__codelineno-1-14" href = "#__codelineno-1-14" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-15" name = "__codelineno-1-15" href = "#__codelineno-1-15" > < / a >
< a id = "__codelineno-1-16" name = "__codelineno-1-16" href = "#__codelineno-1-16" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-1-17" name = "__codelineno-1-17" href = "#__codelineno-1-17" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-18" name = "__codelineno-1-18" href = "#__codelineno-1-18" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-1-19" name = "__codelineno-1-19" href = "#__codelineno-1-19" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-1-20" name = "__codelineno-1-20" href = "#__codelineno-1-20" > < / a >
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< a id = "__codelineno-1-21" name = "__codelineno-1-21" href = "#__codelineno-1-21" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-1-22" name = "__codelineno-1-22" href = "#__codelineno-1-22" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-23" name = "__codelineno-1-23" href = "#__codelineno-1-23" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > double< / span > < span class = "p" > )< / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > double< / span > < span class = "p" > )< / span > < span class = "n" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-24" name = "__codelineno-1-24" href = "#__codelineno-1-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-25" name = "__codelineno-1-25" href = "#__codelineno-1-25" > < / a >
< a id = "__codelineno-1-26" name = "__codelineno-1-26" href = "#__codelineno-1-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-1-27" name = "__codelineno-1-27" href = "#__codelineno-1-27" > < / a > < span class = "w" > < / span > < span class = "n" > string< / span > < span class = "w" > < / span > < span class = "n" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-28" name = "__codelineno-1-28" href = "#__codelineno-1-28" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-29" name = "__codelineno-1-29" href = "#__codelineno-1-29" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若找到 key 则返回对应 val< / span >
< a id = "__codelineno-1-30" name = "__codelineno-1-30" href = "#__codelineno-1-30" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ])< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-31" name = "__codelineno-1-31" href = "#__codelineno-1-31" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-32" name = "__codelineno-1-32" href = "#__codelineno-1-32" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-33" name = "__codelineno-1-33" href = "#__codelineno-1-33" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-34" name = "__codelineno-1-34" href = "#__codelineno-1-34" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-35" name = "__codelineno-1-35" href = "#__codelineno-1-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若未找到 key 则返回 nullptr< / span >
< a id = "__codelineno-1-36" name = "__codelineno-1-36" href = "#__codelineno-1-36" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-37" name = "__codelineno-1-37" href = "#__codelineno-1-37" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-38" name = "__codelineno-1-38" href = "#__codelineno-1-38" > < / a >
< a id = "__codelineno-1-39" name = "__codelineno-1-39" href = "#__codelineno-1-39" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-1-40" name = "__codelineno-1-40" href = "#__codelineno-1-40" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > string< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-41" name = "__codelineno-1-41" href = "#__codelineno-1-41" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-1-42" name = "__codelineno-1-42" href = "#__codelineno-1-42" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-43" name = "__codelineno-1-43" href = "#__codelineno-1-43" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-1-44" name = "__codelineno-1-44" href = "#__codelineno-1-44" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-45" name = "__codelineno-1-45" href = "#__codelineno-1-45" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-46" name = "__codelineno-1-46" href = "#__codelineno-1-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若遇到指定 key ，则更新对应 val 并返回< / span >
< a id = "__codelineno-1-47" name = "__codelineno-1-47" href = "#__codelineno-1-47" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ])< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-48" name = "__codelineno-1-48" href = "#__codelineno-1-48" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-49" name = "__codelineno-1-49" href = "#__codelineno-1-49" > < / a > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-50" name = "__codelineno-1-50" href = "#__codelineno-1-50" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-51" name = "__codelineno-1-51" href = "#__codelineno-1-51" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-52" name = "__codelineno-1-52" href = "#__codelineno-1-52" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-53" name = "__codelineno-1-53" href = "#__codelineno-1-53" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若无该 key ，则将键值对添加至尾部< / span >
< a id = "__codelineno-1-54" name = "__codelineno-1-54" href = "#__codelineno-1-54" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ].< / span > < span class = "n" > push_back< / span > < span class = "p" > (< / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-1-55" name = "__codelineno-1-55" href = "#__codelineno-1-55" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-56" name = "__codelineno-1-56" href = "#__codelineno-1-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-57" name = "__codelineno-1-57" href = "#__codelineno-1-57" > < / a >
< a id = "__codelineno-1-58" name = "__codelineno-1-58" href = "#__codelineno-1-58" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-1-59" name = "__codelineno-1-59" href = "#__codelineno-1-59" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-60" name = "__codelineno-1-60" href = "#__codelineno-1-60" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-61" name = "__codelineno-1-61" href = "#__codelineno-1-61" > < / a > < span class = "w" > < / span > < span class = "k" > auto< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-1-62" name = "__codelineno-1-62" href = "#__codelineno-1-62" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-1-63" name = "__codelineno-1-63" href = "#__codelineno-1-63" > < / 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" > bucket< / 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-1-64" name = "__codelineno-1-64" href = "#__codelineno-1-64" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > bucket< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ]< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-65" name = "__codelineno-1-65" href = "#__codelineno-1-65" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / 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" > bucket< / span > < span class = "p" > [< / span > < span class = "n" > i< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-1-66" name = "__codelineno-1-66" href = "#__codelineno-1-66" > < / a > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > .< / span > < span class = "n" > erase< / span > < span class = "p" > (< / span > < span class = "n" > bucket< / span > < span class = "p" > .< / span > < span class = "n" > begin< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "c1" > // 从中删除键值对< / span >
< a id = "__codelineno-1-67" name = "__codelineno-1-67" href = "#__codelineno-1-67" > < / 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 > < span class = "c1" > // 释放内存< / span >
< a id = "__codelineno-1-68" name = "__codelineno-1-68" href = "#__codelineno-1-68" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-69" name = "__codelineno-1-69" href = "#__codelineno-1-69" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-70" name = "__codelineno-1-70" href = "#__codelineno-1-70" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-71" name = "__codelineno-1-71" href = "#__codelineno-1-71" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-72" name = "__codelineno-1-72" href = "#__codelineno-1-72" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-73" name = "__codelineno-1-73" href = "#__codelineno-1-73" > < / a >
< a id = "__codelineno-1-74" name = "__codelineno-1-74" href = "#__codelineno-1-74" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-1-75" name = "__codelineno-1-75" href = "#__codelineno-1-75" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-76" name = "__codelineno-1-76" href = "#__codelineno-1-76" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-1-77" name = "__codelineno-1-77" href = "#__codelineno-1-77" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *> > < / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-78" name = "__codelineno-1-78" href = "#__codelineno-1-78" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-1-79" name = "__codelineno-1-79" href = "#__codelineno-1-79" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-80" name = "__codelineno-1-80" href = "#__codelineno-1-80" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "n" > clear< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-1-81" name = "__codelineno-1-81" href = "#__codelineno-1-81" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "n" > resize< / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-82" name = "__codelineno-1-82" href = "#__codelineno-1-82" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-83" name = "__codelineno-1-83" href = "#__codelineno-1-83" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-1-84" name = "__codelineno-1-84" href = "#__codelineno-1-84" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > auto< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-85" name = "__codelineno-1-85" href = "#__codelineno-1-85" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-86" name = "__codelineno-1-86" href = "#__codelineno-1-86" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-1-87" name = "__codelineno-1-87" href = "#__codelineno-1-87" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-88" name = "__codelineno-1-88" href = "#__codelineno-1-88" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-89" name = "__codelineno-1-89" href = "#__codelineno-1-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-90" name = "__codelineno-1-90" href = "#__codelineno-1-90" > < / a >
< a id = "__codelineno-1-91" name = "__codelineno-1-91" href = "#__codelineno-1-91" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-1-92" name = "__codelineno-1-92" href = "#__codelineno-1-92" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-93" name = "__codelineno-1-93" href = "#__codelineno-1-93" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > auto< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-94" name = "__codelineno-1-94" href = "#__codelineno-1-94" > < / 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" > " [" < / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-95" name = "__codelineno-1-95" href = "#__codelineno-1-95" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-1-96" name = "__codelineno-1-96" href = "#__codelineno-1-96" > < / a > < span class = "w" > < / span > < span class = "n" > cout< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "s" > " , " < / span > < span class = "p" > ;< / span >
< a id = "__codelineno-1-97" name = "__codelineno-1-97" href = "#__codelineno-1-97" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-98" name = "__codelineno-1-98" href = "#__codelineno-1-98" > < / 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" > " ]< / span > < span class = "se" > \n< / span > < span class = "s" > " < / span > < span class = "p" > ;< / span >
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< a id = "__codelineno-1-99" name = "__codelineno-1-99" href = "#__codelineno-1-99" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-1-100" name = "__codelineno-1-100" href = "#__codelineno-1-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
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< a id = "__codelineno-1-101" name = "__codelineno-1-101" href = "#__codelineno-1-101" > < / a > < span class = "p" > };< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-2-1" name = "__codelineno-2-1" href = "#__codelineno-2-1" > < / a > < span class = "k" > class< / span > < span class = "nc" > HashMapChaining< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-2" name = "__codelineno-2-2" href = "#__codelineno-2-2" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 链式地址哈希表" " " < / span >
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< a id = "__codelineno-2-3" name = "__codelineno-2-3" href = "#__codelineno-2-3" > < / a >
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< a id = "__codelineno-2-4" name = "__codelineno-2-4" href = "#__codelineno-2-4" > < / a > < span class = "k" > def< / span > < span class = "fm" > __init__< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-2-5" name = "__codelineno-2-5" href = "#__codelineno-2-5" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 构造方法" " " < / span >
< a id = "__codelineno-2-6" name = "__codelineno-2-6" href = "#__codelineno-2-6" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "o" > =< / span > < span class = "mi" > 0< / span > < span class = "c1" > # 键值对数量< / span >
< a id = "__codelineno-2-7" name = "__codelineno-2-7" href = "#__codelineno-2-7" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "o" > =< / span > < span class = "mi" > 4< / span > < span class = "c1" > # 哈希表容量< / span >
< a id = "__codelineno-2-8" name = "__codelineno-2-8" href = "#__codelineno-2-8" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > load_thres< / span > < span class = "o" > =< / span > < span class = "mi" > 2< / span > < span class = "o" > /< / span > < span class = "mi" > 3< / span > < span class = "c1" > # 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-2-9" name = "__codelineno-2-9" href = "#__codelineno-2-9" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > extend_ratio< / span > < span class = "o" > =< / span > < span class = "mi" > 2< / span > < span class = "c1" > # 扩容倍数< / span >
< a id = "__codelineno-2-10" name = "__codelineno-2-10" href = "#__codelineno-2-10" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "o" > =< / span > < span class = "p" > [[]< / span > < span class = "k" > for< / span > < span class = "n" > _< / 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" > capacity< / span > < span class = "p" > )]< / span > < span class = "c1" > # 桶数组< / span >
< a id = "__codelineno-2-11" name = "__codelineno-2-11" href = "#__codelineno-2-11" > < / a >
< a id = "__codelineno-2-12" name = "__codelineno-2-12" href = "#__codelineno-2-12" > < / a > < span class = "k" > def< / span > < span class = "nf" > hash_func< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-13" name = "__codelineno-2-13" href = "#__codelineno-2-13" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 哈希函数" " " < / span >
< a id = "__codelineno-2-14" name = "__codelineno-2-14" href = "#__codelineno-2-14" > < / a > < span class = "k" > return< / span > < span class = "n" > key< / span > < span class = "o" > %< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span >
< 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 = "k" > def< / span > < span class = "nf" > load_factor< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > float< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-17" name = "__codelineno-2-17" href = "#__codelineno-2-17" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 负载因子" " " < / span >
< a id = "__codelineno-2-18" name = "__codelineno-2-18" href = "#__codelineno-2-18" > < / 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 = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-2-19" name = "__codelineno-2-19" href = "#__codelineno-2-19" > < / a >
< a id = "__codelineno-2-20" name = "__codelineno-2-20" href = "#__codelineno-2-20" > < / a > < span class = "k" > def< / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > str< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-21" name = "__codelineno-2-21" href = "#__codelineno-2-21" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 查询操作" " " < / span >
< a id = "__codelineno-2-22" name = "__codelineno-2-22" href = "#__codelineno-2-22" > < / a > < span class = "n" > index< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > hash_func< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-23" name = "__codelineno-2-23" href = "#__codelineno-2-23" > < / a > < span class = "n" > bucket< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-2-24" name = "__codelineno-2-24" href = "#__codelineno-2-24" > < / a > < span class = "c1" > # 遍历桶，若找到 key 则返回对应 val< / span >
< a id = "__codelineno-2-25" name = "__codelineno-2-25" href = "#__codelineno-2-25" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "ow" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-26" name = "__codelineno-2-26" href = "#__codelineno-2-26" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "o" > ==< / span > < span class = "n" > key< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-27" name = "__codelineno-2-27" href = "#__codelineno-2-27" > < / a > < span class = "k" > return< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > val< / span >
< a id = "__codelineno-2-28" name = "__codelineno-2-28" href = "#__codelineno-2-28" > < / a > < span class = "c1" > # 若未找到 key 则返回 None< / span >
< a id = "__codelineno-2-29" name = "__codelineno-2-29" href = "#__codelineno-2-29" > < / a > < span class = "k" > return< / span > < span class = "kc" > None< / span >
< a id = "__codelineno-2-30" name = "__codelineno-2-30" href = "#__codelineno-2-30" > < / a >
< a id = "__codelineno-2-31" name = "__codelineno-2-31" href = "#__codelineno-2-31" > < / a > < span class = "k" > def< / span > < span class = "nf" > put< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > str< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-2-32" name = "__codelineno-2-32" href = "#__codelineno-2-32" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 添加操作" " " < / span >
< a id = "__codelineno-2-33" name = "__codelineno-2-33" href = "#__codelineno-2-33" > < / a > < span class = "c1" > # 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-2-34" name = "__codelineno-2-34" href = "#__codelineno-2-34" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > load_factor< / span > < span class = "p" > ()< / span > < span class = "o" > > < / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > load_thres< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-35" name = "__codelineno-2-35" href = "#__codelineno-2-35" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > extend< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-2-36" name = "__codelineno-2-36" href = "#__codelineno-2-36" > < / a > < span class = "n" > index< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > hash_func< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-37" name = "__codelineno-2-37" href = "#__codelineno-2-37" > < / a > < span class = "n" > bucket< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-2-38" name = "__codelineno-2-38" href = "#__codelineno-2-38" > < / a > < span class = "c1" > # 遍历桶，若遇到指定 key ，则更新对应 val 并返回< / span >
< a id = "__codelineno-2-39" name = "__codelineno-2-39" href = "#__codelineno-2-39" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "ow" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-40" name = "__codelineno-2-40" href = "#__codelineno-2-40" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "o" > ==< / span > < span class = "n" > key< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-41" name = "__codelineno-2-41" href = "#__codelineno-2-41" > < / a > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "o" > =< / span > < span class = "n" > val< / span >
< a id = "__codelineno-2-42" name = "__codelineno-2-42" href = "#__codelineno-2-42" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-2-43" name = "__codelineno-2-43" href = "#__codelineno-2-43" > < / a > < span class = "c1" > # 若无该 key ，则将键值对添加至尾部< / span >
< a id = "__codelineno-2-44" name = "__codelineno-2-44" href = "#__codelineno-2-44" > < / a > < span class = "n" > pair< / span > < span class = "o" > =< / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-45" name = "__codelineno-2-45" href = "#__codelineno-2-45" > < / a > < span class = "n" > bucket< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-46" name = "__codelineno-2-46" href = "#__codelineno-2-46" > < / 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-2-47" name = "__codelineno-2-47" href = "#__codelineno-2-47" > < / a >
< a id = "__codelineno-2-48" name = "__codelineno-2-48" href = "#__codelineno-2-48" > < / a > < span class = "k" > def< / span > < span class = "nf" > remove< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-2-49" name = "__codelineno-2-49" href = "#__codelineno-2-49" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 删除操作" " " < / span >
< a id = "__codelineno-2-50" name = "__codelineno-2-50" href = "#__codelineno-2-50" > < / a > < span class = "n" > index< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > hash_func< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-51" name = "__codelineno-2-51" href = "#__codelineno-2-51" > < / a > < span class = "n" > bucket< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-2-52" name = "__codelineno-2-52" href = "#__codelineno-2-52" > < / a > < span class = "c1" > # 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-2-53" name = "__codelineno-2-53" href = "#__codelineno-2-53" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "ow" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-54" name = "__codelineno-2-54" href = "#__codelineno-2-54" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "o" > ==< / span > < span class = "n" > key< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-55" name = "__codelineno-2-55" href = "#__codelineno-2-55" > < / a > < span class = "n" > bucket< / span > < span class = "o" > .< / span > < span class = "n" > remove< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-56" name = "__codelineno-2-56" href = "#__codelineno-2-56" > < / 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-2-57" name = "__codelineno-2-57" href = "#__codelineno-2-57" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-2-58" name = "__codelineno-2-58" href = "#__codelineno-2-58" > < / a >
< a id = "__codelineno-2-59" name = "__codelineno-2-59" href = "#__codelineno-2-59" > < / a > < span class = "k" > def< / span > < span class = "nf" > extend< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-2-60" name = "__codelineno-2-60" href = "#__codelineno-2-60" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 扩容哈希表" " " < / span >
< a id = "__codelineno-2-61" name = "__codelineno-2-61" href = "#__codelineno-2-61" > < / a > < span class = "c1" > # 暂存原哈希表< / span >
< a id = "__codelineno-2-62" name = "__codelineno-2-62" href = "#__codelineno-2-62" > < / a > < span class = "n" > buckets< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span >
< a id = "__codelineno-2-63" name = "__codelineno-2-63" href = "#__codelineno-2-63" > < / a > < span class = "c1" > # 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-2-64" name = "__codelineno-2-64" href = "#__codelineno-2-64" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "o" > *=< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > extend_ratio< / span >
< a id = "__codelineno-2-65" name = "__codelineno-2-65" href = "#__codelineno-2-65" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "o" > =< / span > < span class = "p" > [[]< / span > < span class = "k" > for< / span > < span class = "n" > _< / 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" > capacity< / span > < span class = "p" > )]< / span >
< a id = "__codelineno-2-66" name = "__codelineno-2-66" href = "#__codelineno-2-66" > < / a > < 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-2-67" name = "__codelineno-2-67" href = "#__codelineno-2-67" > < / a > < span class = "c1" > # 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-2-68" name = "__codelineno-2-68" href = "#__codelineno-2-68" > < / a > < span class = "k" > for< / span > < span class = "n" > bucket< / span > < span class = "ow" > in< / span > < span class = "n" > buckets< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-69" name = "__codelineno-2-69" href = "#__codelineno-2-69" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "ow" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-70" name = "__codelineno-2-70" href = "#__codelineno-2-70" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-71" name = "__codelineno-2-71" href = "#__codelineno-2-71" > < / a >
< a id = "__codelineno-2-72" name = "__codelineno-2-72" href = "#__codelineno-2-72" > < / a > < span class = "k" > def< / span > < span class = "nf" > print< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-2-73" name = "__codelineno-2-73" href = "#__codelineno-2-73" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 打印哈希表" " " < / span >
< a id = "__codelineno-2-74" name = "__codelineno-2-74" href = "#__codelineno-2-74" > < / a > < span class = "k" > for< / span > < span class = "n" > bucket< / span > < span class = "ow" > in< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > :< / span >
< a id = "__codelineno-2-75" name = "__codelineno-2-75" href = "#__codelineno-2-75" > < / a > < span class = "n" > res< / span > < span class = "o" > =< / span > < span class = "p" > []< / span >
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< a id = "__codelineno-2-76" name = "__codelineno-2-76" href = "#__codelineno-2-76" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "ow" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > :< / span >
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< a id = "__codelineno-2-77" name = "__codelineno-2-77" href = "#__codelineno-2-77" > < / a > < span class = "n" > res< / span > < span class = "o" > .< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "nb" > str< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "o" > +< / span > < span class = "s2" > " -> " < / span > < span class = "o" > +< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-78" name = "__codelineno-2-78" href = "#__codelineno-2-78" > < / a > < span class = "nb" > print< / span > < span class = "p" > (< / span > < span class = "n" > res< / span > < span class = "p" > )< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.go< / span > < pre > < span > < / span > < code > < a id = "__codelineno-3-1" name = "__codelineno-3-1" href = "#__codelineno-3-1" > < / a > < span class = "cm" > /* 链式地址哈希表 */< / span >
< a id = "__codelineno-3-2" name = "__codelineno-3-2" href = "#__codelineno-3-2" > < / a > < span class = "kd" > type< / span > < span class = "w" > < / span > < span class = "nx" > hashMapChaining< / span > < span class = "w" > < / span > < span class = "kd" > struct< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-3" name = "__codelineno-3-3" href = "#__codelineno-3-3" > < / a > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 键值对数量< / span >
< a id = "__codelineno-3-4" name = "__codelineno-3-4" href = "#__codelineno-3-4" > < / a > < span class = "w" > < / span > < span class = "nx" > capacity< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-3-5" name = "__codelineno-3-5" href = "#__codelineno-3-5" > < / a > < span class = "w" > < / span > < span class = "nx" > loadThres< / span > < span class = "w" > < / span > < span class = "kt" > float64< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-3-6" name = "__codelineno-3-6" href = "#__codelineno-3-6" > < / a > < span class = "w" > < / span > < span class = "nx" > extendRatio< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-3-7" name = "__codelineno-3-7" href = "#__codelineno-3-7" > < / a > < span class = "w" > < / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "p" > [][]< / span > < span class = "nx" > pair< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-3-8" name = "__codelineno-3-8" href = "#__codelineno-3-8" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-9" name = "__codelineno-3-9" href = "#__codelineno-3-9" > < / a >
< a id = "__codelineno-3-10" name = "__codelineno-3-10" href = "#__codelineno-3-10" > < / a > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-3-11" name = "__codelineno-3-11" href = "#__codelineno-3-11" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "nx" > newHashMapChaining< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-12" name = "__codelineno-3-12" href = "#__codelineno-3-12" > < / a > < span class = "w" > < / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([][]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "mi" > 4< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-13" name = "__codelineno-3-13" href = "#__codelineno-3-13" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > 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 = "nx" > i< / span > < span class = "w" > < / span > < span class = "p" > < < / span > < span class = "w" > < / span > < span class = "mi" > 4< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-14" name = "__codelineno-3-14" href = "#__codelineno-3-14" > < / a > < span class = "w" > < / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-15" name = "__codelineno-3-15" href = "#__codelineno-3-15" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-16" name = "__codelineno-3-16" href = "#__codelineno-3-16" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-17" name = "__codelineno-3-17" href = "#__codelineno-3-17" > < / a > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-3-18" name = "__codelineno-3-18" href = "#__codelineno-3-18" > < / a > < span class = "w" > < / span > < span class = "nx" > capacity< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 4< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-3-19" name = "__codelineno-3-19" href = "#__codelineno-3-19" > < / a > < span class = "w" > < / span > < span class = "nx" > loadThres< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "mf" > 3.0< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-3-20" name = "__codelineno-3-20" href = "#__codelineno-3-20" > < / a > < span class = "w" > < / span > < span class = "nx" > extendRatio< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-3-21" name = "__codelineno-3-21" href = "#__codelineno-3-21" > < / a > < span class = "w" > < / span > < span class = "nx" > buckets< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > buckets< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-3-22" name = "__codelineno-3-22" href = "#__codelineno-3-22" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-23" name = "__codelineno-3-23" href = "#__codelineno-3-23" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-24" name = "__codelineno-3-24" href = "#__codelineno-3-24" > < / a >
< a id = "__codelineno-3-25" name = "__codelineno-3-25" href = "#__codelineno-3-25" > < / a > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-3-26" name = "__codelineno-3-26" href = "#__codelineno-3-26" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-27" name = "__codelineno-3-27" href = "#__codelineno-3-27" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span >
< a id = "__codelineno-3-28" name = "__codelineno-3-28" href = "#__codelineno-3-28" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-29" name = "__codelineno-3-29" href = "#__codelineno-3-29" > < / a >
< a id = "__codelineno-3-30" name = "__codelineno-3-30" href = "#__codelineno-3-30" > < / a > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-3-31" name = "__codelineno-3-31" href = "#__codelineno-3-31" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > float64< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-32" name = "__codelineno-3-32" href = "#__codelineno-3-32" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nb" > float64< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-33" name = "__codelineno-3-33" href = "#__codelineno-3-33" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-34" name = "__codelineno-3-34" href = "#__codelineno-3-34" > < / a >
< a id = "__codelineno-3-35" name = "__codelineno-3-35" href = "#__codelineno-3-35" > < / a > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-3-36" name = "__codelineno-3-36" href = "#__codelineno-3-36" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > get< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > string< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-37" name = "__codelineno-3-37" href = "#__codelineno-3-37" > < / a > < span class = "w" > < / span > < span class = "nx" > idx< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-38" name = "__codelineno-3-38" href = "#__codelineno-3-38" > < / a > < span class = "w" > < / span > < span class = "nx" > bucket< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-3-39" name = "__codelineno-3-39" href = "#__codelineno-3-39" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若找到 key 则返回对应 val< / span >
< a id = "__codelineno-3-40" name = "__codelineno-3-40" href = "#__codelineno-3-40" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > bucket< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-41" name = "__codelineno-3-41" href = "#__codelineno-3-41" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-42" name = "__codelineno-3-42" href = "#__codelineno-3-42" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span >
< a id = "__codelineno-3-43" name = "__codelineno-3-43" href = "#__codelineno-3-43" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-44" name = "__codelineno-3-44" href = "#__codelineno-3-44" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-45" name = "__codelineno-3-45" href = "#__codelineno-3-45" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若未找到 key 则返回空字符串< / span >
< a id = "__codelineno-3-46" name = "__codelineno-3-46" href = "#__codelineno-3-46" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "s" > " " < / span >
< a id = "__codelineno-3-47" name = "__codelineno-3-47" href = "#__codelineno-3-47" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-48" name = "__codelineno-3-48" href = "#__codelineno-3-48" > < / a >
< a id = "__codelineno-3-49" name = "__codelineno-3-49" href = "#__codelineno-3-49" > < / a > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-3-50" name = "__codelineno-3-50" href = "#__codelineno-3-50" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > put< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "w" > < / span > < span class = "kt" > string< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-51" name = "__codelineno-3-51" href = "#__codelineno-3-51" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-3-52" name = "__codelineno-3-52" href = "#__codelineno-3-52" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > > < / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > loadThres< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-53" name = "__codelineno-3-53" href = "#__codelineno-3-53" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > extend< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-54" name = "__codelineno-3-54" href = "#__codelineno-3-54" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-55" name = "__codelineno-3-55" href = "#__codelineno-3-55" > < / a > < span class = "w" > < / span > < span class = "nx" > idx< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-56" name = "__codelineno-3-56" href = "#__codelineno-3-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若遇到指定 key ，则更新对应 val 并返回< / span >
< a id = "__codelineno-3-57" name = "__codelineno-3-57" href = "#__codelineno-3-57" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-58" name = "__codelineno-3-58" href = "#__codelineno-3-58" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-59" name = "__codelineno-3-59" href = "#__codelineno-3-59" > < / a > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > val< / span >
< a id = "__codelineno-3-60" name = "__codelineno-3-60" href = "#__codelineno-3-60" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span >
< a id = "__codelineno-3-61" name = "__codelineno-3-61" href = "#__codelineno-3-61" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-62" name = "__codelineno-3-62" href = "#__codelineno-3-62" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-63" name = "__codelineno-3-63" href = "#__codelineno-3-63" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若无该 key ，则将键值对添加至尾部< / span >
< a id = "__codelineno-3-64" name = "__codelineno-3-64" href = "#__codelineno-3-64" > < / a > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > pair< / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-65" name = "__codelineno-3-65" href = "#__codelineno-3-65" > < / a > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-3-66" name = "__codelineno-3-66" href = "#__codelineno-3-66" > < / a > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-3-67" name = "__codelineno-3-67" href = "#__codelineno-3-67" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-68" name = "__codelineno-3-68" href = "#__codelineno-3-68" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nb" > append< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ],< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-69" name = "__codelineno-3-69" href = "#__codelineno-3-69" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-3-70" name = "__codelineno-3-70" href = "#__codelineno-3-70" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-71" name = "__codelineno-3-71" href = "#__codelineno-3-71" > < / a >
< a id = "__codelineno-3-72" name = "__codelineno-3-72" href = "#__codelineno-3-72" > < / a > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-3-73" name = "__codelineno-3-73" href = "#__codelineno-3-73" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > remove< / span > < span class = "p" > (< / span > < span class = "nx" > key< / 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-3-74" name = "__codelineno-3-74" href = "#__codelineno-3-74" > < / a > < span class = "w" > < / span > < span class = "nx" > idx< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-75" name = "__codelineno-3-75" href = "#__codelineno-3-75" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-3-76" name = "__codelineno-3-76" href = "#__codelineno-3-76" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-77" name = "__codelineno-3-77" href = "#__codelineno-3-77" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-78" name = "__codelineno-3-78" href = "#__codelineno-3-78" > < / a > < span class = "w" > < / span > < span class = "c1" > // 切片删除< / span >
< a id = "__codelineno-3-79" name = "__codelineno-3-79" href = "#__codelineno-3-79" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nb" > append< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ][:< / span > < span class = "nx" > i< / span > < span class = "p" > ],< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > idx< / span > < span class = "p" > ][< / span > < span class = "nx" > i< / span > < span class = "o" > +< / span > < span class = "mi" > 1< / span > < span class = "p" > :]< / span > < span class = "o" > ...< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-80" name = "__codelineno-3-80" href = "#__codelineno-3-80" > < / a > < span class = "w" > < / span > < span class = "k" > break< / span >
< a id = "__codelineno-3-81" name = "__codelineno-3-81" href = "#__codelineno-3-81" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-82" name = "__codelineno-3-82" href = "#__codelineno-3-82" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-83" name = "__codelineno-3-83" href = "#__codelineno-3-83" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > -=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-3-84" name = "__codelineno-3-84" href = "#__codelineno-3-84" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-85" name = "__codelineno-3-85" href = "#__codelineno-3-85" > < / a >
< a id = "__codelineno-3-86" name = "__codelineno-3-86" href = "#__codelineno-3-86" > < / a > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-3-87" name = "__codelineno-3-87" href = "#__codelineno-3-87" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-88" name = "__codelineno-3-88" href = "#__codelineno-3-88" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-3-89" name = "__codelineno-3-89" href = "#__codelineno-3-89" > < / a > < span class = "w" > < / span > < span class = "nx" > tmpBuckets< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([][]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > ))< / span >
< a id = "__codelineno-3-90" name = "__codelineno-3-90" href = "#__codelineno-3-90" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > 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 = "nx" > i< / span > < span class = "w" > < / span > < span class = "p" > < < / span > < span class = "w" > < / span > < span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > );< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-91" name = "__codelineno-3-91" href = "#__codelineno-3-91" > < / a > < span class = "w" > < / span > < span class = "nx" > tmpBuckets< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ]))< / span >
< a id = "__codelineno-3-92" name = "__codelineno-3-92" href = "#__codelineno-3-92" > < / a > < span class = "w" > < / span > < span class = "nb" > copy< / span > < span class = "p" > (< / span > < span class = "nx" > tmpBuckets< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ],< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ])< / span >
< a id = "__codelineno-3-93" name = "__codelineno-3-93" href = "#__codelineno-3-93" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-94" name = "__codelineno-3-94" href = "#__codelineno-3-94" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-3-95" name = "__codelineno-3-95" href = "#__codelineno-3-95" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > extendRatio< / span >
< a id = "__codelineno-3-96" name = "__codelineno-3-96" href = "#__codelineno-3-96" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([][]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-97" name = "__codelineno-3-97" href = "#__codelineno-3-97" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > 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 = "nx" > i< / span > < span class = "w" > < / span > < span class = "p" > < < / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-98" name = "__codelineno-3-98" href = "#__codelineno-3-98" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > i< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-99" name = "__codelineno-3-99" href = "#__codelineno-3-99" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-100" name = "__codelineno-3-100" href = "#__codelineno-3-100" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-3-101" name = "__codelineno-3-101" href = "#__codelineno-3-101" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-3-102" name = "__codelineno-3-102" href = "#__codelineno-3-102" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > bucket< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > tmpBuckets< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-103" name = "__codelineno-3-103" href = "#__codelineno-3-103" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > bucket< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-104" name = "__codelineno-3-104" href = "#__codelineno-3-104" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > put< / span > < span class = "p" > (< / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-105" name = "__codelineno-3-105" href = "#__codelineno-3-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-106" name = "__codelineno-3-106" href = "#__codelineno-3-106" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-107" name = "__codelineno-3-107" href = "#__codelineno-3-107" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-3-108" name = "__codelineno-3-108" href = "#__codelineno-3-108" > < / a >
< a id = "__codelineno-3-109" name = "__codelineno-3-109" href = "#__codelineno-3-109" > < / a > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-3-110" name = "__codelineno-3-110" href = "#__codelineno-3-110" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapChaining< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nb" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-111" name = "__codelineno-3-111" href = "#__codelineno-3-111" > < / a > < span class = "w" > < / span > < span class = "kd" > var< / span > < span class = "w" > < / span > < span class = "nx" > builder< / span > < span class = "w" > < / span > < span class = "nx" > strings< / span > < span class = "p" > .< / span > < span class = "nx" > Builder< / span >
< a id = "__codelineno-3-112" name = "__codelineno-3-112" href = "#__codelineno-3-112" > < / a >
< a id = "__codelineno-3-113" name = "__codelineno-3-113" href = "#__codelineno-3-113" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > bucket< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-114" name = "__codelineno-3-114" href = "#__codelineno-3-114" > < / a > < span class = "w" > < / span > < span class = "nx" > builder< / span > < span class = "p" > .< / span > < span class = "nx" > WriteString< / span > < span class = "p" > (< / span > < span class = "s" > " [" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-115" name = "__codelineno-3-115" href = "#__codelineno-3-115" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > bucket< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-3-116" name = "__codelineno-3-116" href = "#__codelineno-3-116" > < / a > < span class = "w" > < / span > < span class = "nx" > builder< / span > < span class = "p" > .< / span > < span class = "nx" > WriteString< / span > < span class = "p" > (< / span > < span class = "nx" > strconv< / span > < span class = "p" > .< / span > < span class = "nx" > Itoa< / span > < span class = "p" > (< / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s" > " " < / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-117" name = "__codelineno-3-117" href = "#__codelineno-3-117" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-118" name = "__codelineno-3-118" href = "#__codelineno-3-118" > < / a > < span class = "w" > < / span > < span class = "nx" > builder< / span > < span class = "p" > .< / span > < span class = "nx" > WriteString< / span > < span class = "p" > (< / span > < span class = "s" > " ]" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-119" name = "__codelineno-3-119" href = "#__codelineno-3-119" > < / a > < span class = "w" > < / span > < span class = "nx" > fmt< / span > < span class = "p" > .< / span > < span class = "nx" > Println< / span > < span class = "p" > (< / span > < span class = "nx" > builder< / span > < span class = "p" > .< / span > < span class = "nx" > String< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-3-120" name = "__codelineno-3-120" href = "#__codelineno-3-120" > < / a > < span class = "w" > < / span > < span class = "nx" > builder< / span > < span class = "p" > .< / span > < span class = "nx" > Reset< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-121" name = "__codelineno-3-121" href = "#__codelineno-3-121" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-3-122" name = "__codelineno-3-122" href = "#__codelineno-3-122" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.js< / span > < pre > < span > < / span > < code > < a id = "__codelineno-4-1" name = "__codelineno-4-1" href = "#__codelineno-4-1" > < / a > < span class = "p" > [< / span > < span class = "kd" > class< / span > < span class = "p" > ]{< / span > < span class = "nx" > HashMapChaining< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "nx" > func< / span > < span class = "p" > ]{}< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.ts< / span > < pre > < span > < / span > < code > < a id = "__codelineno-5-1" name = "__codelineno-5-1" href = "#__codelineno-5-1" > < / a > < span class = "p" > [< / span > < span class = "kd" > class< / span > < span class = "p" > ]{< / span > < span class = "nx" > HashMapChaining< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "nx" > func< / span > < span class = "p" > ]{}< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-6-1" name = "__codelineno-6-1" href = "#__codelineno-6-1" > < / a > < span class = "p" > [< / span > < span class = "n" > class< / span > < span class = "p" > ]{< / span > < span class = "n" > hashMapChaining< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "n" > func< / span > < span class = "p" > ]{}< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.cs< / span > < pre > < span > < / span > < code > < a id = "__codelineno-7-1" name = "__codelineno-7-1" href = "#__codelineno-7-1" > < / a > < span class = "cm" > /* 链式地址哈希表 */< / span >
< a id = "__codelineno-7-2" name = "__codelineno-7-2" href = "#__codelineno-7-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > HashMapChaining< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-3" name = "__codelineno-7-3" href = "#__codelineno-7-3" > < / 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 = "c1" > // 键值对数量< / span >
< a id = "__codelineno-7-4" name = "__codelineno-7-4" href = "#__codelineno-7-4" > < / 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 = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-7-5" name = "__codelineno-7-5" href = "#__codelineno-7-5" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-7-6" name = "__codelineno-7-6" href = "#__codelineno-7-6" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-7-7" name = "__codelineno-7-7" href = "#__codelineno-7-7" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-7-8" name = "__codelineno-7-8" href = "#__codelineno-7-8" > < / a >
< a id = "__codelineno-7-9" name = "__codelineno-7-9" href = "#__codelineno-7-9" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-7-10" name = "__codelineno-7-10" href = "#__codelineno-7-10" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "nf" > HashMapChaining< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-11" name = "__codelineno-7-11" href = "#__codelineno-7-11" > < / a > < span class = "w" > < / span > < span class = "n" > size< / 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-7-12" name = "__codelineno-7-12" href = "#__codelineno-7-12" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 4< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-13" name = "__codelineno-7-13" href = "#__codelineno-7-13" > < / a > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "m" > 3.0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-14" name = "__codelineno-7-14" href = "#__codelineno-7-14" > < / a > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-15" name = "__codelineno-7-15" href = "#__codelineno-7-15" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-16" name = "__codelineno-7-16" href = "#__codelineno-7-16" > < / 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" > capacity< / 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-7-17" name = "__codelineno-7-17" href = "#__codelineno-7-17" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "n" > Add< / span > < span class = "p" > (< / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "p" > ());< / span >
< a id = "__codelineno-7-18" name = "__codelineno-7-18" href = "#__codelineno-7-18" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-19" name = "__codelineno-7-19" href = "#__codelineno-7-19" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-20" name = "__codelineno-7-20" href = "#__codelineno-7-20" > < / a >
< a id = "__codelineno-7-21" name = "__codelineno-7-21" href = "#__codelineno-7-21" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-7-22" name = "__codelineno-7-22" href = "#__codelineno-7-22" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-23" name = "__codelineno-7-23" href = "#__codelineno-7-23" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-7-24" name = "__codelineno-7-24" href = "#__codelineno-7-24" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-25" name = "__codelineno-7-25" href = "#__codelineno-7-25" > < / a >
< a id = "__codelineno-7-26" name = "__codelineno-7-26" href = "#__codelineno-7-26" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-7-27" name = "__codelineno-7-27" href = "#__codelineno-7-27" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "nf" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-28" name = "__codelineno-7-28" href = "#__codelineno-7-28" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > double< / span > < span class = "p" > )< / span > < span class = "n" > size< / 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-7-29" name = "__codelineno-7-29" href = "#__codelineno-7-29" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-30" name = "__codelineno-7-30" href = "#__codelineno-7-30" > < / a >
< a id = "__codelineno-7-31" name = "__codelineno-7-31" href = "#__codelineno-7-31" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-7-32" name = "__codelineno-7-32" href = "#__codelineno-7-32" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > string< / span > < span class = "w" > < / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-33" name = "__codelineno-7-33" href = "#__codelineno-7-33" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-34" name = "__codelineno-7-34" href = "#__codelineno-7-34" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若找到 key 则返回对应 val< / span >
< a id = "__codelineno-7-35" name = "__codelineno-7-35" href = "#__codelineno-7-35" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ])< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-36" name = "__codelineno-7-36" href = "#__codelineno-7-36" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-37" name = "__codelineno-7-37" href = "#__codelineno-7-37" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-38" name = "__codelineno-7-38" href = "#__codelineno-7-38" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-39" name = "__codelineno-7-39" href = "#__codelineno-7-39" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-40" name = "__codelineno-7-40" href = "#__codelineno-7-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若未找到 key 则返回 null< / span >
< a id = "__codelineno-7-41" name = "__codelineno-7-41" href = "#__codelineno-7-41" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-42" name = "__codelineno-7-42" href = "#__codelineno-7-42" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-43" name = "__codelineno-7-43" href = "#__codelineno-7-43" > < / a >
< a id = "__codelineno-7-44" name = "__codelineno-7-44" href = "#__codelineno-7-44" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-7-45" name = "__codelineno-7-45" href = "#__codelineno-7-45" > < / 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" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > string< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-46" name = "__codelineno-7-46" href = "#__codelineno-7-46" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-7-47" name = "__codelineno-7-47" href = "#__codelineno-7-47" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-48" name = "__codelineno-7-48" href = "#__codelineno-7-48" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-7-49" name = "__codelineno-7-49" href = "#__codelineno-7-49" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-50" name = "__codelineno-7-50" href = "#__codelineno-7-50" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-51" name = "__codelineno-7-51" href = "#__codelineno-7-51" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，若遇到指定 key ，则更新对应 val 并返回< / span >
< a id = "__codelineno-7-52" name = "__codelineno-7-52" href = "#__codelineno-7-52" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ])< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-53" name = "__codelineno-7-53" href = "#__codelineno-7-53" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-54" name = "__codelineno-7-54" href = "#__codelineno-7-54" > < / a > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-55" name = "__codelineno-7-55" href = "#__codelineno-7-55" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-56" name = "__codelineno-7-56" href = "#__codelineno-7-56" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-57" name = "__codelineno-7-57" href = "#__codelineno-7-57" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-58" name = "__codelineno-7-58" href = "#__codelineno-7-58" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若无该 key ，则将键值对添加至尾部< / span >
< a id = "__codelineno-7-59" name = "__codelineno-7-59" href = "#__codelineno-7-59" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ].< / span > < span class = "n" > Add< / span > < span class = "p" > (< / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ));< / span >
< a id = "__codelineno-7-60" name = "__codelineno-7-60" href = "#__codelineno-7-60" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "o" > ++< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-61" name = "__codelineno-7-61" href = "#__codelineno-7-61" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-62" name = "__codelineno-7-62" href = "#__codelineno-7-62" > < / a >
< a id = "__codelineno-7-63" name = "__codelineno-7-63" href = "#__codelineno-7-63" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-7-64" name = "__codelineno-7-64" href = "#__codelineno-7-64" > < / 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" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-65" name = "__codelineno-7-65" href = "#__codelineno-7-65" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-66" name = "__codelineno-7-66" href = "#__codelineno-7-66" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-7-67" name = "__codelineno-7-67" href = "#__codelineno-7-67" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ].< / span > < span class = "n" > ToList< / span > < span class = "p" > ())< / span > < span class = "w" > < / span > < span class = "p" > {< / span > < span class = "w" > < / span >
< a id = "__codelineno-7-68" name = "__codelineno-7-68" href = "#__codelineno-7-68" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-69" name = "__codelineno-7-69" href = "#__codelineno-7-69" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ].< / span > < span class = "n" > Remove< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-70" name = "__codelineno-7-70" href = "#__codelineno-7-70" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-71" name = "__codelineno-7-71" href = "#__codelineno-7-71" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-72" name = "__codelineno-7-72" href = "#__codelineno-7-72" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span > < span class = "w" > < / span >
< a id = "__codelineno-7-73" name = "__codelineno-7-73" href = "#__codelineno-7-73" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-74" name = "__codelineno-7-74" href = "#__codelineno-7-74" > < / a >
< a id = "__codelineno-7-75" name = "__codelineno-7-75" href = "#__codelineno-7-75" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-7-76" name = "__codelineno-7-76" href = "#__codelineno-7-76" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "k" > void< / span > < span class = "w" > < / span > < span class = "nf" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-77" name = "__codelineno-7-77" href = "#__codelineno-7-77" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-7-78" name = "__codelineno-7-78" href = "#__codelineno-7-78" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-79" name = "__codelineno-7-79" href = "#__codelineno-7-79" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-7-80" name = "__codelineno-7-80" href = "#__codelineno-7-80" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-7-81" name = "__codelineno-7-81" href = "#__codelineno-7-81" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-82" name = "__codelineno-7-82" href = "#__codelineno-7-82" > < / 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" > capacity< / 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-7-83" name = "__codelineno-7-83" href = "#__codelineno-7-83" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > .< / span > < span class = "n" > Add< / span > < span class = "p" > (< / span > < span class = "k" > new< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "p" > ());< / span >
< a id = "__codelineno-7-84" name = "__codelineno-7-84" href = "#__codelineno-7-84" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-85" name = "__codelineno-7-85" href = "#__codelineno-7-85" > < / a > < span class = "w" > < / span > < span class = "n" > size< / 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-7-86" name = "__codelineno-7-86" href = "#__codelineno-7-86" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-7-87" name = "__codelineno-7-87" href = "#__codelineno-7-87" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-88" name = "__codelineno-7-88" href = "#__codelineno-7-88" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-89" name = "__codelineno-7-89" href = "#__codelineno-7-89" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-90" name = "__codelineno-7-90" href = "#__codelineno-7-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-91" name = "__codelineno-7-91" href = "#__codelineno-7-91" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-92" name = "__codelineno-7-92" href = "#__codelineno-7-92" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-93" name = "__codelineno-7-93" href = "#__codelineno-7-93" > < / a >
< a id = "__codelineno-7-94" name = "__codelineno-7-94" href = "#__codelineno-7-94" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-7-95" name = "__codelineno-7-95" href = "#__codelineno-7-95" > < / 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" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-96" name = "__codelineno-7-96" href = "#__codelineno-7-96" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-97" name = "__codelineno-7-97" href = "#__codelineno-7-97" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > string< / 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 = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > string< / span > < span class = "o" > > < / span > < span class = "p" > ();< / span >
< a id = "__codelineno-7-98" name = "__codelineno-7-98" href = "#__codelineno-7-98" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-99" name = "__codelineno-7-99" href = "#__codelineno-7-99" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > Add< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-100" name = "__codelineno-7-100" href = "#__codelineno-7-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-101" name = "__codelineno-7-101" href = "#__codelineno-7-101" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > string< / span > < span class = "w" > < / span > < span class = "n" > kv< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-7-102" name = "__codelineno-7-102" href = "#__codelineno-7-102" > < / 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 = "n" > kv< / span > < span class = "p" > );< / span >
< a id = "__codelineno-7-103" name = "__codelineno-7-103" href = "#__codelineno-7-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-104" name = "__codelineno-7-104" href = "#__codelineno-7-104" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-105" name = "__codelineno-7-105" href = "#__codelineno-7-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-7-106" name = "__codelineno-7-106" href = "#__codelineno-7-106" > < / a > < span class = "p" > }< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-07-01 22:39:28 +08:00
< div class = "highlight" > < span class = "filename" > hash_map_chaining.swift< / span > < pre > < span > < / span > < code > < a id = "__codelineno-8-1" name = "__codelineno-8-1" href = "#__codelineno-8-1" > < / a > < span class = "cm" > /* 链式地址哈希表 */< / span >
< a id = "__codelineno-8-2" name = "__codelineno-8-2" href = "#__codelineno-8-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > HashMapChaining< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-3" name = "__codelineno-8-3" href = "#__codelineno-8-3" > < / a > < span class = "kd" > var< / span > < span class = "nv" > size< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 键值对数量< / span >
< a id = "__codelineno-8-4" name = "__codelineno-8-4" href = "#__codelineno-8-4" > < / a > < span class = "kd" > var< / span > < span class = "nv" > capacity< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-8-5" name = "__codelineno-8-5" href = "#__codelineno-8-5" > < / a > < span class = "kd" > var< / span > < span class = "nv" > loadThres< / span > < span class = "p" > :< / span > < span class = "nb" > Double< / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-8-6" name = "__codelineno-8-6" href = "#__codelineno-8-6" > < / a > < span class = "kd" > var< / span > < span class = "nv" > extendRatio< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-8-7" name = "__codelineno-8-7" href = "#__codelineno-8-7" > < / a > < span class = "kd" > var< / span > < span class = "nv" > buckets< / span > < span class = "p" > :< / span > < span class = "p" > [[< / span > < span class = "n" > Pair< / span > < span class = "p" > ]]< / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-8-8" name = "__codelineno-8-8" href = "#__codelineno-8-8" > < / a >
< a id = "__codelineno-8-9" name = "__codelineno-8-9" href = "#__codelineno-8-9" > < / a > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-8-10" name = "__codelineno-8-10" href = "#__codelineno-8-10" > < / a > < span class = "kd" > init< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-11" name = "__codelineno-8-11" href = "#__codelineno-8-11" > < / a > < span class = "n" > size< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-8-12" name = "__codelineno-8-12" href = "#__codelineno-8-12" > < / a > < span class = "n" > capacity< / span > < span class = "p" > =< / span > < span class = "mi" > 4< / span >
< a id = "__codelineno-8-13" name = "__codelineno-8-13" href = "#__codelineno-8-13" > < / a > < span class = "n" > loadThres< / span > < span class = "p" > =< / span > < span class = "mi" > 2< / span > < span class = "o" > /< / span > < span class = "mi" > 3< / span >
< a id = "__codelineno-8-14" name = "__codelineno-8-14" href = "#__codelineno-8-14" > < / a > < span class = "n" > extendRatio< / span > < span class = "p" > =< / span > < span class = "mi" > 2< / span >
< a id = "__codelineno-8-15" name = "__codelineno-8-15" href = "#__codelineno-8-15" > < / a > < span class = "n" > buckets< / 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 = "p" > [],< / span > < span class = "bp" > count< / span > < span class = "p" > :< / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-16" name = "__codelineno-8-16" href = "#__codelineno-8-16" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-17" name = "__codelineno-8-17" href = "#__codelineno-8-17" > < / a >
< a id = "__codelineno-8-18" name = "__codelineno-8-18" href = "#__codelineno-8-18" > < / a > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-8-19" name = "__codelineno-8-19" href = "#__codelineno-8-19" > < / a > < span class = "kd" > func< / span > < span class = "nf" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-20" name = "__codelineno-8-20" href = "#__codelineno-8-20" > < / a > < span class = "n" > key< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-8-21" name = "__codelineno-8-21" href = "#__codelineno-8-21" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-22" name = "__codelineno-8-22" href = "#__codelineno-8-22" > < / a >
< a id = "__codelineno-8-23" name = "__codelineno-8-23" href = "#__codelineno-8-23" > < / a > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-8-24" name = "__codelineno-8-24" href = "#__codelineno-8-24" > < / a > < span class = "kd" > func< / span > < span class = "nf" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Double< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-25" name = "__codelineno-8-25" href = "#__codelineno-8-25" > < / a > < span class = "nb" > Double< / span > < span class = "p" > (< / span > < span class = "n" > size< / span > < span class = "o" > /< / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-26" name = "__codelineno-8-26" href = "#__codelineno-8-26" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-27" name = "__codelineno-8-27" href = "#__codelineno-8-27" > < / a >
< a id = "__codelineno-8-28" name = "__codelineno-8-28" href = "#__codelineno-8-28" > < / a > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-8-29" name = "__codelineno-8-29" href = "#__codelineno-8-29" > < / a > < span class = "kd" > func< / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > -> < / span > < span class = "nb" > String< / span > < span class = "p" > ?< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-30" name = "__codelineno-8-30" href = "#__codelineno-8-30" > < / a > < span class = "kd" > let< / span > < span class = "nv" > index< / span > < span class = "p" > =< / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-31" name = "__codelineno-8-31" href = "#__codelineno-8-31" > < / a > < span class = "kd" > let< / span > < span class = "nv" > bucket< / span > < span class = "p" > =< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-8-32" name = "__codelineno-8-32" href = "#__codelineno-8-32" > < / a > < span class = "c1" > // 遍历桶，若找到 key 则返回对应 val< / span >
< a id = "__codelineno-8-33" name = "__codelineno-8-33" href = "#__codelineno-8-33" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "k" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-34" name = "__codelineno-8-34" href = "#__codelineno-8-34" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ==< / span > < span class = "n" > key< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-35" name = "__codelineno-8-35" href = "#__codelineno-8-35" > < / a > < span class = "k" > return< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span >
< a id = "__codelineno-8-36" name = "__codelineno-8-36" href = "#__codelineno-8-36" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-37" name = "__codelineno-8-37" href = "#__codelineno-8-37" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-38" name = "__codelineno-8-38" href = "#__codelineno-8-38" > < / a > < span class = "c1" > // 若未找到 key 则返回 nil< / span >
< a id = "__codelineno-8-39" name = "__codelineno-8-39" href = "#__codelineno-8-39" > < / a > < span class = "k" > return< / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-8-40" name = "__codelineno-8-40" href = "#__codelineno-8-40" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-41" name = "__codelineno-8-41" href = "#__codelineno-8-41" > < / a >
< a id = "__codelineno-8-42" name = "__codelineno-8-42" href = "#__codelineno-8-42" > < / a > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-8-43" name = "__codelineno-8-43" href = "#__codelineno-8-43" > < / a > < span class = "kd" > func< / span > < span class = "nf" > put< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > String< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-44" name = "__codelineno-8-44" href = "#__codelineno-8-44" > < / a > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-8-45" name = "__codelineno-8-45" href = "#__codelineno-8-45" > < / a > < span class = "k" > if< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "o" > > < / span > < span class = "n" > loadThres< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-46" name = "__codelineno-8-46" href = "#__codelineno-8-46" > < / a > < span class = "bp" > extend< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-8-47" name = "__codelineno-8-47" href = "#__codelineno-8-47" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-48" name = "__codelineno-8-48" href = "#__codelineno-8-48" > < / a > < span class = "kd" > let< / span > < span class = "nv" > index< / span > < span class = "p" > =< / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-49" name = "__codelineno-8-49" href = "#__codelineno-8-49" > < / a > < span class = "kd" > let< / span > < span class = "nv" > bucket< / span > < span class = "p" > =< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-8-50" name = "__codelineno-8-50" href = "#__codelineno-8-50" > < / a > < span class = "c1" > // 遍历桶，若遇到指定 key ，则更新对应 val 并返回< / span >
< a id = "__codelineno-8-51" name = "__codelineno-8-51" href = "#__codelineno-8-51" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "k" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-52" name = "__codelineno-8-52" href = "#__codelineno-8-52" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ==< / span > < span class = "n" > key< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-53" name = "__codelineno-8-53" href = "#__codelineno-8-53" > < / a > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > =< / span > < span class = "n" > val< / span >
< a id = "__codelineno-8-54" name = "__codelineno-8-54" href = "#__codelineno-8-54" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-8-55" name = "__codelineno-8-55" href = "#__codelineno-8-55" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-56" name = "__codelineno-8-56" href = "#__codelineno-8-56" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-57" name = "__codelineno-8-57" href = "#__codelineno-8-57" > < / a > < span class = "c1" > // 若无该 key ，则将键值对添加至尾部< / span >
< a id = "__codelineno-8-58" name = "__codelineno-8-58" href = "#__codelineno-8-58" > < / a > < span class = "kd" > let< / span > < span class = "nv" > pair< / span > < span class = "p" > =< / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-59" name = "__codelineno-8-59" href = "#__codelineno-8-59" > < / a > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ].< / span > < span class = "n" > append< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-60" name = "__codelineno-8-60" href = "#__codelineno-8-60" > < / a > < span class = "n" > size< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-8-61" name = "__codelineno-8-61" href = "#__codelineno-8-61" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-62" name = "__codelineno-8-62" href = "#__codelineno-8-62" > < / a >
< a id = "__codelineno-8-63" name = "__codelineno-8-63" href = "#__codelineno-8-63" > < / a > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-8-64" name = "__codelineno-8-64" href = "#__codelineno-8-64" > < / a > < span class = "kd" > func< / span > < span class = "nf" > remove< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-65" name = "__codelineno-8-65" href = "#__codelineno-8-65" > < / a > < span class = "kd" > let< / span > < span class = "nv" > index< / span > < span class = "p" > =< / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-66" name = "__codelineno-8-66" href = "#__codelineno-8-66" > < / a > < span class = "kd" > let< / span > < span class = "nv" > bucket< / span > < span class = "p" > =< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ]< / span >
< a id = "__codelineno-8-67" name = "__codelineno-8-67" href = "#__codelineno-8-67" > < / a > < span class = "c1" > // 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-8-68" name = "__codelineno-8-68" href = "#__codelineno-8-68" > < / a > < span class = "k" > for< / span > < span class = "p" > (< / span > < span class = "n" > pairIndex< / span > < span class = "p" > ,< / span > < span class = "n" > pair< / span > < span class = "p" > )< / span > < span class = "k" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > .< / span > < span class = "n" > enumerated< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-69" name = "__codelineno-8-69" href = "#__codelineno-8-69" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ==< / span > < span class = "n" > key< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-70" name = "__codelineno-8-70" href = "#__codelineno-8-70" > < / a > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ].< / span > < span class = "n" > remove< / span > < span class = "p" > (< / span > < span class = "n" > at< / span > < span class = "p" > :< / span > < span class = "n" > pairIndex< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-71" name = "__codelineno-8-71" href = "#__codelineno-8-71" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-72" name = "__codelineno-8-72" href = "#__codelineno-8-72" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-73" name = "__codelineno-8-73" href = "#__codelineno-8-73" > < / a > < span class = "n" > size< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-8-74" name = "__codelineno-8-74" href = "#__codelineno-8-74" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-75" name = "__codelineno-8-75" href = "#__codelineno-8-75" > < / a >
< a id = "__codelineno-8-76" name = "__codelineno-8-76" href = "#__codelineno-8-76" > < / a > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-8-77" name = "__codelineno-8-77" href = "#__codelineno-8-77" > < / a > < span class = "kd" > func< / span > < span class = "nf" > extend< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-78" name = "__codelineno-8-78" href = "#__codelineno-8-78" > < / a > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-8-79" name = "__codelineno-8-79" href = "#__codelineno-8-79" > < / a > < span class = "kd" > let< / span > < span class = "nv" > bucketsTmp< / span > < span class = "p" > =< / span > < span class = "n" > buckets< / span >
< a id = "__codelineno-8-80" name = "__codelineno-8-80" href = "#__codelineno-8-80" > < / a > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-8-81" name = "__codelineno-8-81" href = "#__codelineno-8-81" > < / a > < span class = "n" > capacity< / span > < span class = "o" > *=< / span > < span class = "n" > extendRatio< / span >
< a id = "__codelineno-8-82" name = "__codelineno-8-82" href = "#__codelineno-8-82" > < / a > < span class = "n" > buckets< / 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 = "p" > [],< / span > < span class = "bp" > count< / span > < span class = "p" > :< / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-83" name = "__codelineno-8-83" href = "#__codelineno-8-83" > < / a > < span class = "n" > size< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-8-84" name = "__codelineno-8-84" href = "#__codelineno-8-84" > < / a > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-8-85" name = "__codelineno-8-85" href = "#__codelineno-8-85" > < / a > < span class = "k" > for< / span > < span class = "n" > bucket< / span > < span class = "k" > in< / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-86" name = "__codelineno-8-86" href = "#__codelineno-8-86" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "k" > in< / span > < span class = "n" > bucket< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-87" name = "__codelineno-8-87" href = "#__codelineno-8-87" > < / a > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-88" name = "__codelineno-8-88" href = "#__codelineno-8-88" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-89" name = "__codelineno-8-89" href = "#__codelineno-8-89" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-90" name = "__codelineno-8-90" href = "#__codelineno-8-90" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-91" name = "__codelineno-8-91" href = "#__codelineno-8-91" > < / a >
< a id = "__codelineno-8-92" name = "__codelineno-8-92" href = "#__codelineno-8-92" > < / a > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-8-93" name = "__codelineno-8-93" href = "#__codelineno-8-93" > < / a > < span class = "kd" > func< / span > < span class = "nf" > print< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-94" name = "__codelineno-8-94" href = "#__codelineno-8-94" > < / a > < span class = "k" > for< / span > < span class = "n" > bucket< / span > < span class = "k" > in< / span > < span class = "n" > buckets< / span > < span class = "p" > {< / span >
< a id = "__codelineno-8-95" name = "__codelineno-8-95" href = "#__codelineno-8-95" > < / a > < span class = "kd" > let< / span > < span class = "nv" > res< / span > < span class = "p" > =< / span > < span class = "n" > bucket< / span > < span class = "p" > .< / span > < span class = "bp" > map< / span > < span class = "p" > {< / span > < span class = "s" > " < / span > < span class = "si" > \(< / span > < span class = "nv" > $0< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "si" > )< / span > < span class = "s" > -> < / span > < span class = "si" > \(< / span > < span class = "nv" > $0< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "si" > )< / span > < span class = "s" > " < / span > < span class = "p" > }< / span >
< a id = "__codelineno-8-96" name = "__codelineno-8-96" href = "#__codelineno-8-96" > < / a > < span class = "n" > Swift< / span > < span class = "p" > .< / span > < span class = "bp" > print< / span > < span class = "p" > (< / span > < span class = "n" > res< / span > < span class = "p" > )< / span >
< a id = "__codelineno-8-97" name = "__codelineno-8-97" href = "#__codelineno-8-97" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-98" name = "__codelineno-8-98" href = "#__codelineno-8-98" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-8-99" name = "__codelineno-8-99" href = "#__codelineno-8-99" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_chaining.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-9-1" name = "__codelineno-9-1" href = "#__codelineno-9-1" > < / a > < span class = "p" > [< / span > < span class = "n" > class< / span > < span class = "p" > ]{< / span > < span class = "n" > HashMapChaining< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "n" > func< / span > < span class = "p" > ]{}< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-26 23:13:50 +08:00
< div class = "highlight" > < span class = "filename" > hash_map_chaining.dart< / span > < pre > < span > < / span > < code > < a id = "__codelineno-10-1" name = "__codelineno-10-1" href = "#__codelineno-10-1" > < / a > < span class = "cm" > /* 链式地址哈希表 */< / span >
< a id = "__codelineno-10-2" name = "__codelineno-10-2" href = "#__codelineno-10-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nc" > HashMapChaining< / 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" > late< / span > < 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 = "c1" > // 键值对数量< / span >
< a id = "__codelineno-10-4" name = "__codelineno-10-4" href = "#__codelineno-10-4" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-10-5" name = "__codelineno-10-5" href = "#__codelineno-10-5" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-10-6" name = "__codelineno-10-6" href = "#__codelineno-10-6" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-10-7" name = "__codelineno-10-7" href = "#__codelineno-10-7" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-10-8" name = "__codelineno-10-8" href = "#__codelineno-10-8" > < / a >
< a id = "__codelineno-10-9" name = "__codelineno-10-9" href = "#__codelineno-10-9" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-10-10" name = "__codelineno-10-10" href = "#__codelineno-10-10" > < / a > < span class = "w" > < / span > < span class = "n" > HashMapChaining< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-11" name = "__codelineno-10-11" href = "#__codelineno-10-11" > < / a > < span class = "w" > < / span > < span class = "n" > size< / 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-10-12" name = "__codelineno-10-12" href = "#__codelineno-10-12" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 4< / 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 = "n" > loadThres< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "m" > 3.0< / 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 = "n" > extendRatio< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-15" name = "__codelineno-10-15" href = "#__codelineno-10-15" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "p" > .< / span > < span class = "n" > generate< / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > => < / span > < span class = "w" > < / span > < span class = "p" > []);< / span >
< a id = "__codelineno-10-16" name = "__codelineno-10-16" href = "#__codelineno-10-16" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-17" name = "__codelineno-10-17" href = "#__codelineno-10-17" > < / a >
< a id = "__codelineno-10-18" name = "__codelineno-10-18" href = "#__codelineno-10-18" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-10-19" name = "__codelineno-10-19" href = "#__codelineno-10-19" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-20" name = "__codelineno-10-20" href = "#__codelineno-10-20" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-10-21" name = "__codelineno-10-21" href = "#__codelineno-10-21" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-22" name = "__codelineno-10-22" href = "#__codelineno-10-22" > < / a >
< a id = "__codelineno-10-23" name = "__codelineno-10-23" href = "#__codelineno-10-23" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-10-24" name = "__codelineno-10-24" href = "#__codelineno-10-24" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / 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 = "k" > return< / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-26" name = "__codelineno-10-26" href = "#__codelineno-10-26" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-27" name = "__codelineno-10-27" href = "#__codelineno-10-27" > < / a >
< a id = "__codelineno-10-28" name = "__codelineno-10-28" href = "#__codelineno-10-28" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-10-29" name = "__codelineno-10-29" href = "#__codelineno-10-29" > < / a > < span class = "w" > < / span > < span class = "kt" > String< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "kd" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-30" name = "__codelineno-10-30" href = "#__codelineno-10-30" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / 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" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / 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 = "c1" > // 遍历桶，若找到 key 则返回对应 val< / span >
< a id = "__codelineno-10-33" name = "__codelineno-10-33" href = "#__codelineno-10-33" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < 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 = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-36" name = "__codelineno-10-36" href = "#__codelineno-10-36" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-37" name = "__codelineno-10-37" href = "#__codelineno-10-37" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-38" name = "__codelineno-10-38" href = "#__codelineno-10-38" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若未找到 key 则返回 null< / span >
< a id = "__codelineno-10-39" name = "__codelineno-10-39" href = "#__codelineno-10-39" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-40" name = "__codelineno-10-40" href = "#__codelineno-10-40" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-41" name = "__codelineno-10-41" href = "#__codelineno-10-41" > < / a >
< a id = "__codelineno-10-42" name = "__codelineno-10-42" href = "#__codelineno-10-42" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-10-43" name = "__codelineno-10-43" href = "#__codelineno-10-43" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > String< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-44" name = "__codelineno-10-44" href = "#__codelineno-10-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-10-45" name = "__codelineno-10-45" href = "#__codelineno-10-45" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-46" name = "__codelineno-10-46" href = "#__codelineno-10-46" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-10-47" name = "__codelineno-10-47" href = "#__codelineno-10-47" > < / a > < 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 = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / 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 = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / 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 = "c1" > // 遍历桶，若遇到指定 key ，则更新对应 val 并返回< / span >
< a id = "__codelineno-10-51" name = "__codelineno-10-51" href = "#__codelineno-10-51" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-52" name = "__codelineno-10-52" href = "#__codelineno-10-52" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-53" name = "__codelineno-10-53" href = "#__codelineno-10-53" > < / a > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-54" name = "__codelineno-10-54" href = "#__codelineno-10-54" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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 = "p" > }< / span >
< a id = "__codelineno-10-56" name = "__codelineno-10-56" href = "#__codelineno-10-56" > < / a > < span class = "w" > < / 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 = "c1" > // 若无该 key ，则将键值对添加至尾部< / span >
< a id = "__codelineno-10-58" name = "__codelineno-10-58" href = "#__codelineno-10-58" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > 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" > bucket< / span > < span class = "p" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > pair< / 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 = "n" > size< / span > < span class = "o" > ++< / 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 = "p" > }< / span >
< a id = "__codelineno-10-62" name = "__codelineno-10-62" href = "#__codelineno-10-62" > < / a >
< a id = "__codelineno-10-63" name = "__codelineno-10-63" href = "#__codelineno-10-63" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-10-64" name = "__codelineno-10-64" href = "#__codelineno-10-64" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-65" name = "__codelineno-10-65" href = "#__codelineno-10-65" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-66" name = "__codelineno-10-66" href = "#__codelineno-10-66" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > index< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-10-67" name = "__codelineno-10-67" href = "#__codelineno-10-67" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-10-68" name = "__codelineno-10-68" href = "#__codelineno-10-68" > < / a > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > .< / span > < span class = "n" > removeWhere< / span > < span class = "p" > ((< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > => < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-69" name = "__codelineno-10-69" href = "#__codelineno-10-69" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "o" > --< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-70" name = "__codelineno-10-70" href = "#__codelineno-10-70" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-71" name = "__codelineno-10-71" href = "#__codelineno-10-71" > < / a >
< a id = "__codelineno-10-72" name = "__codelineno-10-72" href = "#__codelineno-10-72" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-10-73" name = "__codelineno-10-73" href = "#__codelineno-10-73" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-74" name = "__codelineno-10-74" href = "#__codelineno-10-74" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-10-75" name = "__codelineno-10-75" href = "#__codelineno-10-75" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > > < / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-76" name = "__codelineno-10-76" href = "#__codelineno-10-76" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-10-77" name = "__codelineno-10-77" href = "#__codelineno-10-77" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-10-78" name = "__codelineno-10-78" href = "#__codelineno-10-78" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "p" > .< / span > < span class = "n" > generate< / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > => < / span > < span class = "w" > < / span > < span class = "p" > []);< / span >
< a id = "__codelineno-10-79" name = "__codelineno-10-79" href = "#__codelineno-10-79" > < / a > < span class = "w" > < / span > < span class = "n" > size< / 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-10-80" name = "__codelineno-10-80" href = "#__codelineno-10-80" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-10-81" name = "__codelineno-10-81" href = "#__codelineno-10-81" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-82" name = "__codelineno-10-82" href = "#__codelineno-10-82" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-83" name = "__codelineno-10-83" href = "#__codelineno-10-83" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-84" name = "__codelineno-10-84" href = "#__codelineno-10-84" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-85" name = "__codelineno-10-85" href = "#__codelineno-10-85" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-86" name = "__codelineno-10-86" href = "#__codelineno-10-86" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-87" name = "__codelineno-10-87" href = "#__codelineno-10-87" > < / a >
< a id = "__codelineno-10-88" name = "__codelineno-10-88" href = "#__codelineno-10-88" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-10-89" name = "__codelineno-10-89" href = "#__codelineno-10-89" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > printHashMap< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-90" name = "__codelineno-10-90" href = "#__codelineno-10-90" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-91" name = "__codelineno-10-91" href = "#__codelineno-10-91" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "kt" > String< / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > [];< / span >
< a id = "__codelineno-10-92" name = "__codelineno-10-92" href = "#__codelineno-10-92" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucket< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-10-93" name = "__codelineno-10-93" href = "#__codelineno-10-93" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "s2" > " < / span > < span class = "si" > ${< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "si" > }< / span > < span class = "s2" > -> < / span > < span class = "si" > ${< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "si" > }< / span > < span class = "s2" > " < / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-94" name = "__codelineno-10-94" href = "#__codelineno-10-94" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-95" name = "__codelineno-10-95" href = "#__codelineno-10-95" > < / a > < span class = "w" > < / span > < span class = "n" > print< / span > < span class = "p" > (< / span > < span class = "n" > res< / span > < span class = "p" > );< / span >
< a id = "__codelineno-10-96" name = "__codelineno-10-96" href = "#__codelineno-10-96" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-97" name = "__codelineno-10-97" href = "#__codelineno-10-97" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-10-98" name = "__codelineno-10-98" href = "#__codelineno-10-98" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< / div >
< / div >
< div class = "admonition tip" >
< p class = "admonition-title" > Tip< / p >
< p > 为了提高效率，< strong > 我们可以将链表转换为「AVL 树」或「红黑树」< / strong > ，从而将查询操作的时间复杂度优化至 < span class = "arithmatex" > \(O(\log n)\)< / span > 。< / p >
< / div >
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< h2 id = "622" > 6.2.2. 开放寻址< a class = "headerlink" href = "#622" title = "Permanent link" > ¶ < / a > < / h2 >
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< p > 「开放寻址 Open Addressing」不引入额外的数据结构， ， < / p >
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< h3 id = "_1" > 线性探测< a class = "headerlink" href = "#_1" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > 线性探测采用固定步长的线性查找来进行探测，对应的哈希表操作方法为：< / p >
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< ul >
< li > < strong > 插入元素< / strong > ：通过哈希函数计算数组索引，若发现桶内已有元素，则从冲突位置向后线性遍历（步长通常为 < span class = "arithmatex" > \(1\)< / span > ），直至找到空位，将元素插入其中。< / li >
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< li > < strong > 查找元素< / strong > ：若发现哈希冲突，则使用相同步长向后线性遍历，直到找到对应元素，返回 < code > value< / code > 即可；或者若遇到空位，说明目标键值对不在哈希表中，返回 < span class = "arithmatex" > \(\text{None}\)< / span > 。< / li >
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< / ul >
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< p > < img alt = "线性探测" src = "../hash_collision.assets/hash_table_linear_probing.png" / > < / p >
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< p align = "center" > Fig. 线性探测 < / p >
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< p > 然而，线性探测存在以下缺陷：< / p >
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< ul >
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< li > < strong > 不能直接删除元素< / strong > 。删除元素会在数组内产生一个空位，查找其他元素时，该空位可能导致程序误判元素不存在。因此，需要借助一个标志位来标记已删除元素。< / li >
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< li > < strong > 容易产生聚集< / strong > 。数组内连续被占用位置越长，这些连续位置发生哈希冲突的可能性越大，进一步促使这一位置的“聚堆生长”，最终导致增删查改操作效率降低。< / li >
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< / ul >
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< p > 如以下代码所示，为开放寻址（线性探测）哈希表的简单实现，重点包括：< / p >
< ul >
< li > 我们使用一个固定的键值对实例 < code > removed< / code > 来标记已删除元素。也就是说，当一个桶为 < span class = "arithmatex" > \(\text{None}\)< / span > 或 < code > removed< / code > 时，这个桶都是空的，可用于放置键值对。< / li >
< li > 被标记为已删除的空间是可以再次被使用的。当插入元素时，若通过哈希函数找到了被标记为已删除的索引，则可将该元素放置到该索引。< / li >
< li > 在线性探测时，我们从当前索引 < code > index< / code > 向后遍历；而当越过数组尾部时，需要回到头部继续遍历。< / li >
< / ul >
< div class = "tabbed-set tabbed-alternate" data-tabs = "2:11" > < input checked = "checked" id = "__tabbed_2_1" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_2" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_3" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_4" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_5" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_6" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_7" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_8" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_9" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_10" name = "__tabbed_2" type = "radio" / > < input id = "__tabbed_2_11" name = "__tabbed_2" type = "radio" / > < div class = "tabbed-labels" > < label for = "__tabbed_2_1" > Java< / label > < label for = "__tabbed_2_2" > C++< / label > < label for = "__tabbed_2_3" > Python< / label > < label for = "__tabbed_2_4" > Go< / label > < label for = "__tabbed_2_5" > JavaScript< / label > < label for = "__tabbed_2_6" > TypeScript< / label > < label for = "__tabbed_2_7" > C< / label > < label for = "__tabbed_2_8" > C#< / label > < label for = "__tabbed_2_9" > Swift< / label > < label for = "__tabbed_2_10" > Zig< / label > < label for = "__tabbed_2_11" > Dart< / label > < / div >
< div class = "tabbed-content" >
< div class = "tabbed-block" >
2023-06-26 23:13:50 +08:00
< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.java< / span > < pre > < span > < / span > < code > < a id = "__codelineno-11-1" name = "__codelineno-11-1" href = "#__codelineno-11-1" > < / a > < span class = "cm" > /* 开放寻址哈希表 */< / span >
< a id = "__codelineno-11-2" name = "__codelineno-11-2" href = "#__codelineno-11-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > HashMapOpenAddressing< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-3" name = "__codelineno-11-3" href = "#__codelineno-11-3" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < 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 = "c1" > // 键值对数量< / span >
< a id = "__codelineno-11-4" name = "__codelineno-11-4" href = "#__codelineno-11-4" > < / 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" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-11-5" name = "__codelineno-11-5" href = "#__codelineno-11-5" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-11-6" name = "__codelineno-11-6" href = "#__codelineno-11-6" > < / 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" > extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-11-7" name = "__codelineno-11-7" href = "#__codelineno-11-7" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "o" > []< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-11-8" name = "__codelineno-11-8" href = "#__codelineno-11-8" > < / a > < span class = "w" > < / span > < span class = "kd" > private< / span > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 删除标记< / span >
< a id = "__codelineno-11-9" name = "__codelineno-11-9" href = "#__codelineno-11-9" > < / a >
< a id = "__codelineno-11-10" name = "__codelineno-11-10" href = "#__codelineno-11-10" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-11-11" name = "__codelineno-11-11" href = "#__codelineno-11-11" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "nf" > HashMapOpenAddressing< / span > < span class = "p" > ()< / span > < span class = "w" > < / 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 = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-13" name = "__codelineno-11-13" href = "#__codelineno-11-13" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 4< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-14" name = "__codelineno-11-14" href = "#__codelineno-11-14" > < / a > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 2.0< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "mf" > 3.0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-15" name = "__codelineno-11-15" href = "#__codelineno-11-15" > < / a > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-16" name = "__codelineno-11-16" href = "#__codelineno-11-16" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > Pair< / span > < span class = "o" > [< / span > < span class = "n" > capacity< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-17" name = "__codelineno-11-17" href = "#__codelineno-11-17" > < / a > < span class = "w" > < / span > < span class = "n" > removed< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "s" > " -1" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-18" name = "__codelineno-11-18" href = "#__codelineno-11-18" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-19" name = "__codelineno-11-19" href = "#__codelineno-11-19" > < / a >
< a id = "__codelineno-11-20" name = "__codelineno-11-20" href = "#__codelineno-11-20" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-11-21" name = "__codelineno-11-21" href = "#__codelineno-11-21" > < / 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" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-11-23" name = "__codelineno-11-23" href = "#__codelineno-11-23" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-24" name = "__codelineno-11-24" href = "#__codelineno-11-24" > < / a >
< a id = "__codelineno-11-25" name = "__codelineno-11-25" href = "#__codelineno-11-25" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-11-26" name = "__codelineno-11-26" href = "#__codelineno-11-26" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "nf" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > double< / span > < span class = "p" > )< / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-28" name = "__codelineno-11-28" href = "#__codelineno-11-28" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-29" name = "__codelineno-11-29" href = "#__codelineno-11-29" > < / a >
< a id = "__codelineno-11-30" name = "__codelineno-11-30" href = "#__codelineno-11-30" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-11-31" name = "__codelineno-11-31" href = "#__codelineno-11-31" > < / a > < span class = "w" > < / span > < span class = "kd" > public< / span > < span class = "w" > < / span > < span class = "n" > String< / span > < span class = "w" > < / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-32" name = "__codelineno-11-32" href = "#__codelineno-11-32" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / 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" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-11-34" name = "__codelineno-11-34" href = "#__codelineno-11-34" > < / 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" > capacity< / 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-11-35" name = "__codelineno-11-35" href = "#__codelineno-11-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-11-36" name = "__codelineno-11-36" href = "#__codelineno-11-36" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / 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 = "c1" > // 若遇到空桶，说明无此 key ，则返回 null< / span >
< a id = "__codelineno-11-38" name = "__codelineno-11-38" href = "#__codelineno-11-38" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span >
< a id = "__codelineno-11-39" name = "__codelineno-11-39" href = "#__codelineno-11-39" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-40" name = "__codelineno-11-40" href = "#__codelineno-11-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则返回对应 val< / span >
< a id = "__codelineno-11-41" name = "__codelineno-11-41" href = "#__codelineno-11-41" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > removed< / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "p" > .< / span > < span class = "na" > val< / 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 = "p" > }< / span >
< a id = "__codelineno-11-44" name = "__codelineno-11-44" href = "#__codelineno-11-44" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-45" name = "__codelineno-11-45" href = "#__codelineno-11-45" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-46" name = "__codelineno-11-46" href = "#__codelineno-11-46" > < / a >
< a id = "__codelineno-11-47" name = "__codelineno-11-47" href = "#__codelineno-11-47" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-11-48" name = "__codelineno-11-48" href = "#__codelineno-11-48" > < / 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" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > String< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-49" name = "__codelineno-11-49" href = "#__codelineno-11-49" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-11-50" name = "__codelineno-11-50" href = "#__codelineno-11-50" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-51" name = "__codelineno-11-51" href = "#__codelineno-11-51" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / 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 = "p" > }< / span >
< a id = "__codelineno-11-53" name = "__codelineno-11-53" href = "#__codelineno-11-53" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-54" name = "__codelineno-11-54" href = "#__codelineno-11-54" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-11-55" name = "__codelineno-11-55" href = "#__codelineno-11-55" > < / 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" > capacity< / 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-11-56" name = "__codelineno-11-56" href = "#__codelineno-11-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-11-57" name = "__codelineno-11-57" href = "#__codelineno-11-57" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-58" name = "__codelineno-11-58" href = "#__codelineno-11-58" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶、或带有删除标记的桶，则将键值对放入该桶< / 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" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "o" > ||< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span > < span class = "w" > < / 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 = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-61" name = "__codelineno-11-61" href = "#__codelineno-11-61" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-62" name = "__codelineno-11-62" href = "#__codelineno-11-62" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-63" name = "__codelineno-11-63" href = "#__codelineno-11-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-64" name = "__codelineno-11-64" href = "#__codelineno-11-64" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则更新对应 val< / span >
< a id = "__codelineno-11-65" name = "__codelineno-11-65" href = "#__codelineno-11-65" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / 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" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-67" name = "__codelineno-11-67" href = "#__codelineno-11-67" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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 = "p" > }< / span >
< a id = "__codelineno-11-69" name = "__codelineno-11-69" href = "#__codelineno-11-69" > < / a > < span class = "w" > < / 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 = "p" > }< / span >
< a id = "__codelineno-11-71" name = "__codelineno-11-71" href = "#__codelineno-11-71" > < / a >
< a id = "__codelineno-11-72" name = "__codelineno-11-72" href = "#__codelineno-11-72" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-11-73" name = "__codelineno-11-73" href = "#__codelineno-11-73" > < / 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" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-74" name = "__codelineno-11-74" href = "#__codelineno-11-74" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-75" name = "__codelineno-11-75" href = "#__codelineno-11-75" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-11-76" name = "__codelineno-11-76" href = "#__codelineno-11-76" > < / 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" > capacity< / 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-11-77" name = "__codelineno-11-77" href = "#__codelineno-11-77" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-11-78" name = "__codelineno-11-78" href = "#__codelineno-11-78" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-79" name = "__codelineno-11-79" href = "#__codelineno-11-79" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则直接返回< / span >
< a id = "__codelineno-11-80" name = "__codelineno-11-80" href = "#__codelineno-11-80" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-81" name = "__codelineno-11-81" href = "#__codelineno-11-81" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-82" name = "__codelineno-11-82" href = "#__codelineno-11-82" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-83" name = "__codelineno-11-83" href = "#__codelineno-11-83" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则标记删除并返回< / span >
< a id = "__codelineno-11-84" name = "__codelineno-11-84" href = "#__codelineno-11-84" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-85" name = "__codelineno-11-85" href = "#__codelineno-11-85" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "o" > [< / span > < span class = "n" > j< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-86" name = "__codelineno-11-86" href = "#__codelineno-11-86" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > -=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-87" name = "__codelineno-11-87" href = "#__codelineno-11-87" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-88" name = "__codelineno-11-88" href = "#__codelineno-11-88" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-89" name = "__codelineno-11-89" href = "#__codelineno-11-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-90" name = "__codelineno-11-90" href = "#__codelineno-11-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-91" name = "__codelineno-11-91" href = "#__codelineno-11-91" > < / a >
< a id = "__codelineno-11-92" name = "__codelineno-11-92" href = "#__codelineno-11-92" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-11-93" name = "__codelineno-11-93" href = "#__codelineno-11-93" > < / 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" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-94" name = "__codelineno-11-94" href = "#__codelineno-11-94" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-11-95" name = "__codelineno-11-95" href = "#__codelineno-11-95" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "o" > []< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-96" name = "__codelineno-11-96" href = "#__codelineno-11-96" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-11-97" name = "__codelineno-11-97" href = "#__codelineno-11-97" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-98" name = "__codelineno-11-98" href = "#__codelineno-11-98" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > Pair< / span > < span class = "o" > [< / span > < span class = "n" > capacity< / span > < span class = "o" > ]< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-99" name = "__codelineno-11-99" href = "#__codelineno-11-99" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-11-100" name = "__codelineno-11-100" href = "#__codelineno-11-100" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-11-101" name = "__codelineno-11-101" href = "#__codelineno-11-101" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-102" name = "__codelineno-11-102" href = "#__codelineno-11-102" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-103" name = "__codelineno-11-103" href = "#__codelineno-11-103" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-104" name = "__codelineno-11-104" href = "#__codelineno-11-104" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-105" name = "__codelineno-11-105" href = "#__codelineno-11-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-106" name = "__codelineno-11-106" href = "#__codelineno-11-106" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-107" name = "__codelineno-11-107" href = "#__codelineno-11-107" > < / a >
< a id = "__codelineno-11-108" name = "__codelineno-11-108" href = "#__codelineno-11-108" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-11-109" name = "__codelineno-11-109" href = "#__codelineno-11-109" > < / 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" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-110" name = "__codelineno-11-110" href = "#__codelineno-11-110" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-111" name = "__codelineno-11-111" href = "#__codelineno-11-111" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-112" name = "__codelineno-11-112" href = "#__codelineno-11-112" > < / 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 = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > key< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "na" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-11-113" name = "__codelineno-11-113" href = "#__codelineno-11-113" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-11-114" name = "__codelineno-11-114" href = "#__codelineno-11-114" > < / 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" > " null" < / span > < span class = "p" > );< / span >
2023-06-14 01:57:52 +08:00
< a id = "__codelineno-11-115" name = "__codelineno-11-115" href = "#__codelineno-11-115" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-116" name = "__codelineno-11-116" href = "#__codelineno-11-116" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-11-117" name = "__codelineno-11-117" href = "#__codelineno-11-117" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
2023-06-26 23:13:50 +08:00
< a id = "__codelineno-11-118" name = "__codelineno-11-118" href = "#__codelineno-11-118" > < / a > < span class = "p" > }< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-26 23:13:50 +08:00
< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.cpp< / span > < pre > < span > < / span > < code > < a id = "__codelineno-12-1" name = "__codelineno-12-1" href = "#__codelineno-12-1" > < / a > < span class = "cm" > /* 开放寻址哈希表 */< / span >
< a id = "__codelineno-12-2" name = "__codelineno-12-2" href = "#__codelineno-12-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > HashMapOpenAddressing< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-3" name = "__codelineno-12-3" href = "#__codelineno-12-3" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "o" > :< / span >
< a id = "__codelineno-12-4" name = "__codelineno-12-4" href = "#__codelineno-12-4" > < / 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 = "c1" > // 键值对数量< / span >
< a id = "__codelineno-12-5" name = "__codelineno-12-5" href = "#__codelineno-12-5" > < / 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 = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-12-6" name = "__codelineno-12-6" href = "#__codelineno-12-6" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-12-7" name = "__codelineno-12-7" href = "#__codelineno-12-7" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-12-8" name = "__codelineno-12-8" href = "#__codelineno-12-8" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *> < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-12-9" name = "__codelineno-12-9" href = "#__codelineno-12-9" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > removed< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 删除标记< / span >
< a id = "__codelineno-12-10" name = "__codelineno-12-10" href = "#__codelineno-12-10" > < / a >
< a id = "__codelineno-12-11" name = "__codelineno-12-11" href = "#__codelineno-12-11" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "o" > :< / span >
< a id = "__codelineno-12-12" name = "__codelineno-12-12" href = "#__codelineno-12-12" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-12-13" name = "__codelineno-12-13" href = "#__codelineno-12-13" > < / a > < span class = "w" > < / span > < span class = "n" > HashMapOpenAddressing< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-14" name = "__codelineno-12-14" href = "#__codelineno-12-14" > < / a > < span class = "w" > < / span > < span class = "c1" > // 构造方法< / span >
< a id = "__codelineno-12-15" name = "__codelineno-12-15" href = "#__codelineno-12-15" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-16" name = "__codelineno-12-16" href = "#__codelineno-12-16" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 4< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-17" name = "__codelineno-12-17" href = "#__codelineno-12-17" > < / a > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 2.0< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "mf" > 3.0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-18" name = "__codelineno-12-18" href = "#__codelineno-12-18" > < / a > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-19" name = "__codelineno-12-19" href = "#__codelineno-12-19" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *> < / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-20" name = "__codelineno-12-20" href = "#__codelineno-12-20" > < / a > < span class = "w" > < / span > < span class = "n" > removed< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "mi" > -1< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "s" > " -1" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-21" name = "__codelineno-12-21" href = "#__codelineno-12-21" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-22" name = "__codelineno-12-22" href = "#__codelineno-12-22" > < / a >
< a id = "__codelineno-12-23" name = "__codelineno-12-23" href = "#__codelineno-12-23" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-12-24" name = "__codelineno-12-24" href = "#__codelineno-12-24" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-25" name = "__codelineno-12-25" href = "#__codelineno-12-25" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-12-26" name = "__codelineno-12-26" href = "#__codelineno-12-26" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-27" name = "__codelineno-12-27" href = "#__codelineno-12-27" > < / a >
< a id = "__codelineno-12-28" name = "__codelineno-12-28" href = "#__codelineno-12-28" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-12-29" name = "__codelineno-12-29" href = "#__codelineno-12-29" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-30" name = "__codelineno-12-30" href = "#__codelineno-12-30" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > static_cast< / span > < span class = "o" > < < / span > < span class = "kt" > double< / span > < span class = "o" > > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-31" name = "__codelineno-12-31" href = "#__codelineno-12-31" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-32" name = "__codelineno-12-32" href = "#__codelineno-12-32" > < / a >
< a id = "__codelineno-12-33" name = "__codelineno-12-33" href = "#__codelineno-12-33" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-12-34" name = "__codelineno-12-34" href = "#__codelineno-12-34" > < / a > < span class = "w" > < / span > < span class = "n" > string< / span > < span class = "w" > < / span > < span class = "n" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-35" name = "__codelineno-12-35" href = "#__codelineno-12-35" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-36" name = "__codelineno-12-36" href = "#__codelineno-12-36" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-12-37" name = "__codelineno-12-37" href = "#__codelineno-12-37" > < / 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" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-38" name = "__codelineno-12-38" href = "#__codelineno-12-38" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-12-39" name = "__codelineno-12-39" href = "#__codelineno-12-39" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-40" name = "__codelineno-12-40" href = "#__codelineno-12-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则返回 nullptr< / span >
< a id = "__codelineno-12-41" name = "__codelineno-12-41" href = "#__codelineno-12-41" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span >
< a id = "__codelineno-12-42" name = "__codelineno-12-42" href = "#__codelineno-12-42" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-43" name = "__codelineno-12-43" href = "#__codelineno-12-43" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则返回对应 val< / span >
< a id = "__codelineno-12-44" name = "__codelineno-12-44" href = "#__codelineno-12-44" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span >
< a id = "__codelineno-12-45" name = "__codelineno-12-45" href = "#__codelineno-12-45" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-46" name = "__codelineno-12-46" href = "#__codelineno-12-46" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-47" name = "__codelineno-12-47" href = "#__codelineno-12-47" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-48" name = "__codelineno-12-48" href = "#__codelineno-12-48" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-49" name = "__codelineno-12-49" href = "#__codelineno-12-49" > < / a >
< a id = "__codelineno-12-50" name = "__codelineno-12-50" href = "#__codelineno-12-50" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-12-51" name = "__codelineno-12-51" href = "#__codelineno-12-51" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > string< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-52" name = "__codelineno-12-52" href = "#__codelineno-12-52" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-12-53" name = "__codelineno-12-53" href = "#__codelineno-12-53" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > )< / span >
< a id = "__codelineno-12-54" name = "__codelineno-12-54" href = "#__codelineno-12-54" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-12-55" name = "__codelineno-12-55" href = "#__codelineno-12-55" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-56" name = "__codelineno-12-56" href = "#__codelineno-12-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-12-57" name = "__codelineno-12-57" href = "#__codelineno-12-57" > < / 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" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-58" name = "__codelineno-12-58" href = "#__codelineno-12-58" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-12-59" name = "__codelineno-12-59" href = "#__codelineno-12-59" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-60" name = "__codelineno-12-60" href = "#__codelineno-12-60" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶、或带有删除标记的桶，则将键值对放入该桶< / span >
< a id = "__codelineno-12-61" name = "__codelineno-12-61" href = "#__codelineno-12-61" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "w" > < / span > < span class = "o" > ||< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-62" name = "__codelineno-12-62" href = "#__codelineno-12-62" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-63" name = "__codelineno-12-63" href = "#__codelineno-12-63" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-64" name = "__codelineno-12-64" href = "#__codelineno-12-64" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-65" name = "__codelineno-12-65" href = "#__codelineno-12-65" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-66" name = "__codelineno-12-66" href = "#__codelineno-12-66" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则更新对应 val< / span >
< a id = "__codelineno-12-67" name = "__codelineno-12-67" href = "#__codelineno-12-67" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-68" name = "__codelineno-12-68" href = "#__codelineno-12-68" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-69" name = "__codelineno-12-69" href = "#__codelineno-12-69" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-70" name = "__codelineno-12-70" href = "#__codelineno-12-70" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-71" name = "__codelineno-12-71" href = "#__codelineno-12-71" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-72" name = "__codelineno-12-72" href = "#__codelineno-12-72" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-73" name = "__codelineno-12-73" href = "#__codelineno-12-73" > < / a >
< a id = "__codelineno-12-74" name = "__codelineno-12-74" href = "#__codelineno-12-74" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-12-75" name = "__codelineno-12-75" href = "#__codelineno-12-75" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-76" name = "__codelineno-12-76" href = "#__codelineno-12-76" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-77" name = "__codelineno-12-77" href = "#__codelineno-12-77" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-12-78" name = "__codelineno-12-78" href = "#__codelineno-12-78" > < / 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" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-79" name = "__codelineno-12-79" href = "#__codelineno-12-79" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-12-80" name = "__codelineno-12-80" href = "#__codelineno-12-80" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-81" name = "__codelineno-12-81" href = "#__codelineno-12-81" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则直接返回< / span >
< a id = "__codelineno-12-82" name = "__codelineno-12-82" href = "#__codelineno-12-82" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span >
< a id = "__codelineno-12-83" name = "__codelineno-12-83" href = "#__codelineno-12-83" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-84" name = "__codelineno-12-84" href = "#__codelineno-12-84" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则标记删除并返回< / span >
< a id = "__codelineno-12-85" name = "__codelineno-12-85" href = "#__codelineno-12-85" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-86" name = "__codelineno-12-86" href = "#__codelineno-12-86" > < / a > < span class = "w" > < / span > < span class = "k" > delete< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ];< / span > < span class = "w" > < / span > < span class = "c1" > // 释放内存< / span >
< a id = "__codelineno-12-87" name = "__codelineno-12-87" href = "#__codelineno-12-87" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-88" name = "__codelineno-12-88" href = "#__codelineno-12-88" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > -=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-89" name = "__codelineno-12-89" href = "#__codelineno-12-89" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-90" name = "__codelineno-12-90" href = "#__codelineno-12-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-91" name = "__codelineno-12-91" href = "#__codelineno-12-91" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-92" name = "__codelineno-12-92" href = "#__codelineno-12-92" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-93" name = "__codelineno-12-93" href = "#__codelineno-12-93" > < / a >
< a id = "__codelineno-12-94" name = "__codelineno-12-94" href = "#__codelineno-12-94" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-12-95" name = "__codelineno-12-95" href = "#__codelineno-12-95" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-96" name = "__codelineno-12-96" href = "#__codelineno-12-96" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-12-97" name = "__codelineno-12-97" href = "#__codelineno-12-97" > < / a > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *> < / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-98" name = "__codelineno-12-98" href = "#__codelineno-12-98" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-12-99" name = "__codelineno-12-99" href = "#__codelineno-12-99" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-100" name = "__codelineno-12-100" href = "#__codelineno-12-100" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > vector< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *> < / span > < span class = "p" > (< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-101" name = "__codelineno-12-101" href = "#__codelineno-12-101" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-102" name = "__codelineno-12-102" href = "#__codelineno-12-102" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-12-103" name = "__codelineno-12-103" href = "#__codelineno-12-103" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-104" name = "__codelineno-12-104" href = "#__codelineno-12-104" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-105" name = "__codelineno-12-105" href = "#__codelineno-12-105" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-12-106" name = "__codelineno-12-106" href = "#__codelineno-12-106" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-107" name = "__codelineno-12-107" href = "#__codelineno-12-107" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-108" name = "__codelineno-12-108" href = "#__codelineno-12-108" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-109" name = "__codelineno-12-109" href = "#__codelineno-12-109" > < / a >
< a id = "__codelineno-12-110" name = "__codelineno-12-110" href = "#__codelineno-12-110" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-12-111" name = "__codelineno-12-111" href = "#__codelineno-12-111" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-112" name = "__codelineno-12-112" href = "#__codelineno-12-112" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "k" > auto< / span > < span class = "w" > < / span > < span class = "o" > & < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > :< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-113" name = "__codelineno-12-113" href = "#__codelineno-12-113" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > nullptr< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-114" name = "__codelineno-12-114" href = "#__codelineno-12-114" > < / a > < span class = "w" > < / span > < span class = "n" > cout< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "o" > -> < / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > < < < / span > < span class = "w" > < / span > < span class = "n" > endl< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-12-115" name = "__codelineno-12-115" href = "#__codelineno-12-115" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-12-116" name = "__codelineno-12-116" href = "#__codelineno-12-116" > < / 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" > " nullptr" < / 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-12-117" name = "__codelineno-12-117" href = "#__codelineno-12-117" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-118" name = "__codelineno-12-118" href = "#__codelineno-12-118" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-119" name = "__codelineno-12-119" href = "#__codelineno-12-119" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-12-120" name = "__codelineno-12-120" href = "#__codelineno-12-120" > < / a > < span class = "p" > };< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.py< / span > < pre > < span > < / span > < code > < a id = "__codelineno-13-1" name = "__codelineno-13-1" href = "#__codelineno-13-1" > < / a > < span class = "k" > class< / span > < span class = "nc" > HashMapOpenAddressing< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-2" name = "__codelineno-13-2" href = "#__codelineno-13-2" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 开放寻址哈希表" " " < / span >
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< a id = "__codelineno-13-3" name = "__codelineno-13-3" href = "#__codelineno-13-3" > < / a >
2023-06-26 23:13:50 +08:00
< a id = "__codelineno-13-4" name = "__codelineno-13-4" href = "#__codelineno-13-4" > < / a > < span class = "k" > def< / span > < span class = "fm" > __init__< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-13-5" name = "__codelineno-13-5" href = "#__codelineno-13-5" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 构造方法" " " < / span >
< a id = "__codelineno-13-6" name = "__codelineno-13-6" href = "#__codelineno-13-6" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "o" > =< / span > < span class = "mi" > 0< / span > < span class = "c1" > # 键值对数量< / span >
< a id = "__codelineno-13-7" name = "__codelineno-13-7" href = "#__codelineno-13-7" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "o" > =< / span > < span class = "mi" > 4< / span > < span class = "c1" > # 哈希表容量< / span >
< a id = "__codelineno-13-8" name = "__codelineno-13-8" href = "#__codelineno-13-8" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > load_thres< / span > < span class = "o" > =< / span > < span class = "mi" > 2< / span > < span class = "o" > /< / span > < span class = "mi" > 3< / span > < span class = "c1" > # 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-13-9" name = "__codelineno-13-9" href = "#__codelineno-13-9" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > extend_ratio< / span > < span class = "o" > =< / span > < span class = "mi" > 2< / span > < span class = "c1" > # 扩容倍数< / span >
< a id = "__codelineno-13-10" name = "__codelineno-13-10" href = "#__codelineno-13-10" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > :< / span > < span class = "nb" > list< / span > < span class = "p" > [< / span > < span class = "n" > Pair< / span > < span class = "o" > |< / span > < span class = "kc" > None< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "kc" > None< / 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 = "c1" > # 桶数组< / span >
< a id = "__codelineno-13-11" name = "__codelineno-13-11" href = "#__codelineno-13-11" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > removed< / span > < span class = "o" > =< / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span > < span class = "s2" > " -1" < / span > < span class = "p" > )< / span > < span class = "c1" > # 删除标记< / span >
< a id = "__codelineno-13-12" name = "__codelineno-13-12" href = "#__codelineno-13-12" > < / a >
< a id = "__codelineno-13-13" name = "__codelineno-13-13" href = "#__codelineno-13-13" > < / a > < span class = "k" > def< / span > < span class = "nf" > hash_func< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > int< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-14" name = "__codelineno-13-14" href = "#__codelineno-13-14" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 哈希函数" " " < / span >
< a id = "__codelineno-13-15" name = "__codelineno-13-15" href = "#__codelineno-13-15" > < / a > < span class = "k" > return< / span > < span class = "n" > key< / span > < span class = "o" > %< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-13-16" name = "__codelineno-13-16" href = "#__codelineno-13-16" > < / a >
< a id = "__codelineno-13-17" name = "__codelineno-13-17" href = "#__codelineno-13-17" > < / a > < span class = "k" > def< / span > < span class = "nf" > load_factor< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > float< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-18" name = "__codelineno-13-18" href = "#__codelineno-13-18" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 负载因子" " " < / span >
< a id = "__codelineno-13-19" name = "__codelineno-13-19" href = "#__codelineno-13-19" > < / 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 = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-13-20" name = "__codelineno-13-20" href = "#__codelineno-13-20" > < / a >
< a id = "__codelineno-13-21" name = "__codelineno-13-21" href = "#__codelineno-13-21" > < / a > < span class = "k" > def< / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "nb" > str< / 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 = "sd" > " " " 查询操作" " " < / span >
< a id = "__codelineno-13-23" name = "__codelineno-13-23" href = "#__codelineno-13-23" > < / a > < span class = "n" > index< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > hash_func< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-24" name = "__codelineno-13-24" href = "#__codelineno-13-24" > < / a > < span class = "c1" > # 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-13-25" name = "__codelineno-13-25" href = "#__codelineno-13-25" > < / 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" > capacity< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-13-26" name = "__codelineno-13-26" href = "#__codelineno-13-26" > < / a > < span class = "c1" > # 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-13-27" name = "__codelineno-13-27" href = "#__codelineno-13-27" > < / a > < span class = "n" > j< / span > < span class = "o" > =< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "o" > +< / 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" > capacity< / span >
< a id = "__codelineno-13-28" name = "__codelineno-13-28" href = "#__codelineno-13-28" > < / a > < span class = "c1" > # 若遇到空桶，说明无此 key ，则返回 None< / span >
< a id = "__codelineno-13-29" name = "__codelineno-13-29" href = "#__codelineno-13-29" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "ow" > is< / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-30" name = "__codelineno-13-30" href = "#__codelineno-13-30" > < / a > < span class = "k" > return< / span > < span class = "kc" > None< / span >
< a id = "__codelineno-13-31" name = "__codelineno-13-31" href = "#__codelineno-13-31" > < / a > < span class = "c1" > # 若遇到指定 key ，则返回对应 val< / span >
< a id = "__codelineno-13-32" name = "__codelineno-13-32" href = "#__codelineno-13-32" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "o" > ==< / span > < span class = "n" > key< / span > < span class = "ow" > and< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > !=< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > removed< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-33" name = "__codelineno-13-33" href = "#__codelineno-13-33" > < / a > < span class = "k" > return< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > .< / span > < span class = "n" > val< / span >
< a id = "__codelineno-13-34" name = "__codelineno-13-34" href = "#__codelineno-13-34" > < / a >
< a id = "__codelineno-13-35" name = "__codelineno-13-35" href = "#__codelineno-13-35" > < / a > < span class = "k" > def< / span > < span class = "nf" > put< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > str< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-13-36" name = "__codelineno-13-36" href = "#__codelineno-13-36" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 添加操作" " " < / span >
< a id = "__codelineno-13-37" name = "__codelineno-13-37" href = "#__codelineno-13-37" > < / a > < span class = "c1" > # 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-13-38" name = "__codelineno-13-38" href = "#__codelineno-13-38" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > load_factor< / span > < span class = "p" > ()< / span > < span class = "o" > > < / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > load_thres< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-39" name = "__codelineno-13-39" href = "#__codelineno-13-39" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > extend< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-13-40" name = "__codelineno-13-40" href = "#__codelineno-13-40" > < / a > < span class = "n" > index< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > hash_func< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-41" name = "__codelineno-13-41" href = "#__codelineno-13-41" > < / a > < span class = "c1" > # 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-13-42" name = "__codelineno-13-42" href = "#__codelineno-13-42" > < / 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" > capacity< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-13-43" name = "__codelineno-13-43" href = "#__codelineno-13-43" > < / a > < span class = "c1" > # 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-13-44" name = "__codelineno-13-44" href = "#__codelineno-13-44" > < / a > < span class = "n" > j< / span > < span class = "o" > =< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "o" > +< / 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" > capacity< / span >
< a id = "__codelineno-13-45" name = "__codelineno-13-45" href = "#__codelineno-13-45" > < / a > < span class = "c1" > # 若遇到空桶、或带有删除标记的桶，则将键值对放入该桶< / span >
< a id = "__codelineno-13-46" name = "__codelineno-13-46" href = "#__codelineno-13-46" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "ow" > in< / span > < span class = "p" > [< / span > < span class = "kc" > None< / span > < span class = "p" > ,< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > removed< / span > < span class = "p" > ]:< / span >
< a id = "__codelineno-13-47" name = "__codelineno-13-47" href = "#__codelineno-13-47" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-48" name = "__codelineno-13-48" href = "#__codelineno-13-48" > < / 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-13-49" name = "__codelineno-13-49" href = "#__codelineno-13-49" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-13-50" name = "__codelineno-13-50" href = "#__codelineno-13-50" > < / a > < span class = "c1" > # 若遇到指定 key ，则更新对应 val< / span >
< a id = "__codelineno-13-51" name = "__codelineno-13-51" href = "#__codelineno-13-51" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "o" > ==< / span > < span class = "n" > key< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-52" name = "__codelineno-13-52" href = "#__codelineno-13-52" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "o" > =< / span > < span class = "n" > val< / span >
< a id = "__codelineno-13-53" name = "__codelineno-13-53" href = "#__codelineno-13-53" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-13-54" name = "__codelineno-13-54" href = "#__codelineno-13-54" > < / a >
< a id = "__codelineno-13-55" name = "__codelineno-13-55" href = "#__codelineno-13-55" > < / a > < span class = "k" > def< / span > < span class = "nf" > remove< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ,< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > int< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-13-56" name = "__codelineno-13-56" href = "#__codelineno-13-56" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 删除操作" " " < / span >
< a id = "__codelineno-13-57" name = "__codelineno-13-57" href = "#__codelineno-13-57" > < / a > < span class = "n" > index< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > hash_func< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-58" name = "__codelineno-13-58" href = "#__codelineno-13-58" > < / a > < span class = "c1" > # 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-13-59" name = "__codelineno-13-59" href = "#__codelineno-13-59" > < / 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" > capacity< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-13-60" name = "__codelineno-13-60" href = "#__codelineno-13-60" > < / a > < span class = "c1" > # 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-13-61" name = "__codelineno-13-61" href = "#__codelineno-13-61" > < / a > < span class = "n" > j< / span > < span class = "o" > =< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "o" > +< / 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" > capacity< / span >
< a id = "__codelineno-13-62" name = "__codelineno-13-62" href = "#__codelineno-13-62" > < / a > < span class = "c1" > # 若遇到空桶，说明无此 key ，则直接返回< / span >
< a id = "__codelineno-13-63" name = "__codelineno-13-63" href = "#__codelineno-13-63" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "ow" > is< / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-64" name = "__codelineno-13-64" href = "#__codelineno-13-64" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-13-65" name = "__codelineno-13-65" href = "#__codelineno-13-65" > < / a > < span class = "c1" > # 若遇到指定 key ，则标记删除并返回< / span >
< a id = "__codelineno-13-66" name = "__codelineno-13-66" href = "#__codelineno-13-66" > < / a > < span class = "k" > if< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "o" > ==< / span > < span class = "n" > key< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-67" name = "__codelineno-13-67" href = "#__codelineno-13-67" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > removed< / span >
< a id = "__codelineno-13-68" name = "__codelineno-13-68" href = "#__codelineno-13-68" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-13-69" name = "__codelineno-13-69" href = "#__codelineno-13-69" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-13-70" name = "__codelineno-13-70" href = "#__codelineno-13-70" > < / a >
< a id = "__codelineno-13-71" name = "__codelineno-13-71" href = "#__codelineno-13-71" > < / a > < span class = "k" > def< / span > < span class = "nf" > extend< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< a id = "__codelineno-13-72" name = "__codelineno-13-72" href = "#__codelineno-13-72" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 扩容哈希表" " " < / span >
< a id = "__codelineno-13-73" name = "__codelineno-13-73" href = "#__codelineno-13-73" > < / a > < span class = "c1" > # 暂存原哈希表< / span >
< a id = "__codelineno-13-74" name = "__codelineno-13-74" href = "#__codelineno-13-74" > < / a > < span class = "n" > buckets_tmp< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span >
< a id = "__codelineno-13-75" name = "__codelineno-13-75" href = "#__codelineno-13-75" > < / a > < span class = "c1" > # 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-13-76" name = "__codelineno-13-76" href = "#__codelineno-13-76" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span > < span class = "o" > *=< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > extend_ratio< / span >
< a id = "__codelineno-13-77" name = "__codelineno-13-77" href = "#__codelineno-13-77" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "kc" > None< / span > < span class = "p" > ]< / span > < span class = "o" > *< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-13-78" name = "__codelineno-13-78" href = "#__codelineno-13-78" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "o" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-13-79" name = "__codelineno-13-79" href = "#__codelineno-13-79" > < / a > < span class = "c1" > # 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-13-80" name = "__codelineno-13-80" href = "#__codelineno-13-80" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "ow" > in< / span > < span class = "n" > buckets_tmp< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-81" name = "__codelineno-13-81" href = "#__codelineno-13-81" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "ow" > not< / span > < span class = "ow" > in< / span > < span class = "p" > [< / span > < span class = "kc" > None< / span > < span class = "p" > ,< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > removed< / span > < span class = "p" > ]:< / span >
< a id = "__codelineno-13-82" name = "__codelineno-13-82" href = "#__codelineno-13-82" > < / a > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-83" name = "__codelineno-13-83" href = "#__codelineno-13-83" > < / a >
< a id = "__codelineno-13-84" name = "__codelineno-13-84" href = "#__codelineno-13-84" > < / a > < span class = "k" > def< / span > < span class = "nf" > print< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > )< / span > < span class = "o" > -> < / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-85" name = "__codelineno-13-85" href = "#__codelineno-13-85" > < / a > < span class = "w" > < / span > < span class = "sd" > " " " 打印哈希表" " " < / span >
< a id = "__codelineno-13-86" name = "__codelineno-13-86" href = "#__codelineno-13-86" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "ow" > in< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > buckets< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-87" name = "__codelineno-13-87" href = "#__codelineno-13-87" > < / a > < span class = "k" > if< / span > < span class = "n" > pair< / span > < span class = "ow" > is< / span > < span class = "ow" > not< / span > < span class = "kc" > None< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-88" name = "__codelineno-13-88" href = "#__codelineno-13-88" > < / a > < span class = "nb" > print< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "s2" > " -> " < / span > < span class = "p" > ,< / span > < span class = "n" > pair< / span > < span class = "o" > .< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-13-89" name = "__codelineno-13-89" href = "#__codelineno-13-89" > < / a > < span class = "k" > else< / span > < span class = "p" > :< / span >
< a id = "__codelineno-13-90" name = "__codelineno-13-90" href = "#__codelineno-13-90" > < / a > < span class = "nb" > print< / span > < span class = "p" > (< / span > < span class = "s2" > " None" < / span > < span class = "p" > )< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-26 23:13:50 +08:00
< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.go< / span > < pre > < span > < / span > < code > < a id = "__codelineno-14-1" name = "__codelineno-14-1" href = "#__codelineno-14-1" > < / a > < span class = "cm" > /* 链式地址哈希表 */< / span >
< a id = "__codelineno-14-2" name = "__codelineno-14-2" href = "#__codelineno-14-2" > < / a > < span class = "kd" > type< / span > < span class = "w" > < / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "w" > < / span > < span class = "kd" > struct< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-3" name = "__codelineno-14-3" href = "#__codelineno-14-3" > < / a > < span class = "w" > < / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 键值对数量< / span >
< a id = "__codelineno-14-4" name = "__codelineno-14-4" href = "#__codelineno-14-4" > < / a > < span class = "w" > < / span > < span class = "nx" > capacity< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-14-5" name = "__codelineno-14-5" href = "#__codelineno-14-5" > < / a > < span class = "w" > < / span > < span class = "nx" > loadThres< / span > < span class = "w" > < / span > < span class = "kt" > float64< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-14-6" name = "__codelineno-14-6" href = "#__codelineno-14-6" > < / a > < span class = "w" > < / span > < span class = "nx" > extendRatio< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-14-7" name = "__codelineno-14-7" href = "#__codelineno-14-7" > < / a > < span class = "w" > < / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "p" > []< / span > < span class = "nx" > pair< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-14-8" name = "__codelineno-14-8" href = "#__codelineno-14-8" > < / a > < span class = "w" > < / span > < span class = "nx" > removed< / span > < span class = "w" > < / span > < span class = "nx" > pair< / span > < span class = "w" > < / span > < span class = "c1" > // 删除标记< / span >
< a id = "__codelineno-14-9" name = "__codelineno-14-9" href = "#__codelineno-14-9" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-10" name = "__codelineno-14-10" href = "#__codelineno-14-10" > < / a >
< a id = "__codelineno-14-11" name = "__codelineno-14-11" href = "#__codelineno-14-11" > < / a > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-14-12" name = "__codelineno-14-12" href = "#__codelineno-14-12" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "nx" > newHashMapOpenAddressing< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-13" name = "__codelineno-14-13" href = "#__codelineno-14-13" > < / a > < span class = "w" > < / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "mi" > 4< / 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 = "o" > & < / span > < span class = "nx" > hashMapOpenAddressing< / 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 = "nx" > size< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-14-16" name = "__codelineno-14-16" href = "#__codelineno-14-16" > < / a > < span class = "w" > < / span > < span class = "nx" > capacity< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 4< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-14-17" name = "__codelineno-14-17" href = "#__codelineno-14-17" > < / a > < span class = "w" > < / span > < span class = "nx" > loadThres< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "mf" > 3.0< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-14-18" name = "__codelineno-14-18" href = "#__codelineno-14-18" > < / a > < span class = "w" > < / span > < span class = "nx" > extendRatio< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "mi" > 2< / 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 = "nx" > buckets< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > buckets< / 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 = "nx" > removed< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > pair< / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-21" name = "__codelineno-14-21" href = "#__codelineno-14-21" > < / a > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-14-22" name = "__codelineno-14-22" href = "#__codelineno-14-22" > < / a > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "s" > " -1" < / span > < span class = "p" > ,< / span >
< a id = "__codelineno-14-23" name = "__codelineno-14-23" href = "#__codelineno-14-23" > < / a > < 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 = "p" > }< / span >
< a id = "__codelineno-14-25" name = "__codelineno-14-25" href = "#__codelineno-14-25" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-26" name = "__codelineno-14-26" href = "#__codelineno-14-26" > < / a >
< a id = "__codelineno-14-27" name = "__codelineno-14-27" href = "#__codelineno-14-27" > < / a > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-14-28" name = "__codelineno-14-28" href = "#__codelineno-14-28" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-29" name = "__codelineno-14-29" href = "#__codelineno-14-29" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > %< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span >
< a id = "__codelineno-14-30" name = "__codelineno-14-30" href = "#__codelineno-14-30" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-31" name = "__codelineno-14-31" href = "#__codelineno-14-31" > < / a >
< a id = "__codelineno-14-32" name = "__codelineno-14-32" href = "#__codelineno-14-32" > < / a > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-14-33" name = "__codelineno-14-33" href = "#__codelineno-14-33" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "kt" > float64< / span > < span class = "w" > < / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "nb" > float64< / span > < span class = "p" > (< / span > < span class = "nx" > m< / 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 = "nb" > float64< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-35" name = "__codelineno-14-35" href = "#__codelineno-14-35" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-36" name = "__codelineno-14-36" href = "#__codelineno-14-36" > < / a >
< a id = "__codelineno-14-37" name = "__codelineno-14-37" href = "#__codelineno-14-37" > < / a > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-14-38" name = "__codelineno-14-38" href = "#__codelineno-14-38" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > get< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "kt" > string< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-39" name = "__codelineno-14-39" href = "#__codelineno-14-39" > < / a > < span class = "w" > < / span > < span class = "nx" > idx< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-40" name = "__codelineno-14-40" href = "#__codelineno-14-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-14-41" name = "__codelineno-14-41" href = "#__codelineno-14-41" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > 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 = "nx" > i< / span > < span class = "w" > < / span > < span class = "p" > < < / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-42" name = "__codelineno-14-42" href = "#__codelineno-14-42" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-14-43" name = "__codelineno-14-43" href = "#__codelineno-14-43" > < / a > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > idx< / 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" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span >
< a id = "__codelineno-14-44" name = "__codelineno-14-44" href = "#__codelineno-14-44" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则返回 null< / span >
< a id = "__codelineno-14-45" name = "__codelineno-14-45" href = "#__codelineno-14-45" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > pair< / span > < span class = "p" > {})< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-46" name = "__codelineno-14-46" href = "#__codelineno-14-46" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "s" > " " < / span >
< a id = "__codelineno-14-47" name = "__codelineno-14-47" href = "#__codelineno-14-47" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-48" name = "__codelineno-14-48" href = "#__codelineno-14-48" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则返回对应 val< / 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 = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ].< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > removed< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-50" name = "__codelineno-14-50" href = "#__codelineno-14-50" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ].< / span > < span class = "nx" > val< / span >
< a id = "__codelineno-14-51" name = "__codelineno-14-51" href = "#__codelineno-14-51" > < / a > < span class = "w" > < / 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 > < span class = "w" > < / span > < span class = "c1" > // 若未找到 key 则返回空字符串< / span >
< a id = "__codelineno-14-54" name = "__codelineno-14-54" href = "#__codelineno-14-54" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "s" > " " < / span >
< a id = "__codelineno-14-55" name = "__codelineno-14-55" href = "#__codelineno-14-55" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-56" name = "__codelineno-14-56" href = "#__codelineno-14-56" > < / a >
< a id = "__codelineno-14-57" name = "__codelineno-14-57" href = "#__codelineno-14-57" > < / a > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-14-58" name = "__codelineno-14-58" href = "#__codelineno-14-58" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > put< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "w" > < / span > < span class = "kt" > string< / 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 = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-14-60" name = "__codelineno-14-60" href = "#__codelineno-14-60" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > > < / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > loadThres< / span > < span class = "w" > < / 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 = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > extend< / 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 = "p" > }< / span >
< a id = "__codelineno-14-63" name = "__codelineno-14-63" href = "#__codelineno-14-63" > < / a > < span class = "w" > < / span > < span class = "nx" > idx< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-64" name = "__codelineno-14-64" href = "#__codelineno-14-64" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-14-65" name = "__codelineno-14-65" href = "#__codelineno-14-65" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > 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 = "nx" > i< / span > < span class = "w" > < / span > < span class = "p" > < < / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-66" name = "__codelineno-14-66" href = "#__codelineno-14-66" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-14-67" name = "__codelineno-14-67" href = "#__codelineno-14-67" > < / a > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > idx< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span >
< a id = "__codelineno-14-68" name = "__codelineno-14-68" href = "#__codelineno-14-68" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶、或带有删除标记的桶，则将键值对放入该桶< / span >
< a id = "__codelineno-14-69" name = "__codelineno-14-69" href = "#__codelineno-14-69" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > pair< / span > < span class = "p" > {})< / span > < span class = "w" > < / span > < span class = "o" > ||< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > removed< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-70" name = "__codelineno-14-70" href = "#__codelineno-14-70" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > pair< / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-71" name = "__codelineno-14-71" href = "#__codelineno-14-71" > < / a > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-14-72" name = "__codelineno-14-72" href = "#__codelineno-14-72" > < / a > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nx" > val< / span > < span class = "p" > ,< / span >
< a id = "__codelineno-14-73" name = "__codelineno-14-73" href = "#__codelineno-14-73" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-74" name = "__codelineno-14-74" href = "#__codelineno-14-74" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-14-75" name = "__codelineno-14-75" href = "#__codelineno-14-75" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span >
< a id = "__codelineno-14-76" name = "__codelineno-14-76" href = "#__codelineno-14-76" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-77" name = "__codelineno-14-77" href = "#__codelineno-14-77" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则更新对应 val< / span >
< a id = "__codelineno-14-78" name = "__codelineno-14-78" href = "#__codelineno-14-78" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ].< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-79" name = "__codelineno-14-79" href = "#__codelineno-14-79" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ].< / span > < span class = "nx" > val< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > val< / span >
< a id = "__codelineno-14-80" name = "__codelineno-14-80" href = "#__codelineno-14-80" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-81" name = "__codelineno-14-81" href = "#__codelineno-14-81" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-82" name = "__codelineno-14-82" href = "#__codelineno-14-82" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-83" name = "__codelineno-14-83" href = "#__codelineno-14-83" > < / a >
< a id = "__codelineno-14-84" name = "__codelineno-14-84" href = "#__codelineno-14-84" > < / a > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-14-85" name = "__codelineno-14-85" href = "#__codelineno-14-85" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > remove< / span > < span class = "p" > (< / span > < span class = "nx" > key< / 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-14-86" name = "__codelineno-14-86" href = "#__codelineno-14-86" > < / a > < span class = "w" > < / span > < span class = "nx" > idx< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > hashFunc< / span > < span class = "p" > (< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-87" name = "__codelineno-14-87" href = "#__codelineno-14-87" > < / a > < span class = "w" > < / span > < span class = "c1" > // 遍历桶，从中删除键值对< / span >
< a id = "__codelineno-14-88" name = "__codelineno-14-88" href = "#__codelineno-14-88" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-14-89" name = "__codelineno-14-89" href = "#__codelineno-14-89" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > 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 = "nx" > i< / span > < span class = "w" > < / span > < span class = "p" > < < / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "nx" > i< / span > < span class = "o" > ++< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-90" name = "__codelineno-14-90" href = "#__codelineno-14-90" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-14-91" name = "__codelineno-14-91" href = "#__codelineno-14-91" > < / a > < span class = "w" > < / span > < span class = "nx" > j< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > idx< / 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" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span >
< a id = "__codelineno-14-92" name = "__codelineno-14-92" href = "#__codelineno-14-92" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则直接返回< / span >
< a id = "__codelineno-14-93" name = "__codelineno-14-93" href = "#__codelineno-14-93" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > pair< / span > < span class = "p" > {})< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-94" name = "__codelineno-14-94" href = "#__codelineno-14-94" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span >
< a id = "__codelineno-14-95" name = "__codelineno-14-95" href = "#__codelineno-14-95" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-96" name = "__codelineno-14-96" href = "#__codelineno-14-96" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则标记删除并返回< / span >
< a id = "__codelineno-14-97" name = "__codelineno-14-97" href = "#__codelineno-14-97" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ].< / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "nx" > key< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-98" name = "__codelineno-14-98" href = "#__codelineno-14-98" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > [< / span > < span class = "nx" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > removed< / span >
< a id = "__codelineno-14-99" name = "__codelineno-14-99" href = "#__codelineno-14-99" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "o" > -=< / span > < span class = "w" > < / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-14-100" name = "__codelineno-14-100" href = "#__codelineno-14-100" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-101" name = "__codelineno-14-101" href = "#__codelineno-14-101" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-102" name = "__codelineno-14-102" href = "#__codelineno-14-102" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-103" name = "__codelineno-14-103" href = "#__codelineno-14-103" > < / a >
< a id = "__codelineno-14-104" name = "__codelineno-14-104" href = "#__codelineno-14-104" > < / a > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-14-105" name = "__codelineno-14-105" href = "#__codelineno-14-105" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nx" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-106" name = "__codelineno-14-106" href = "#__codelineno-14-106" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-14-107" name = "__codelineno-14-107" href = "#__codelineno-14-107" > < / a > < span class = "w" > < / span > < span class = "nx" > tmpBuckets< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > ))< / span >
< a id = "__codelineno-14-108" name = "__codelineno-14-108" href = "#__codelineno-14-108" > < / a > < span class = "w" > < / span > < span class = "nb" > copy< / span > < span class = "p" > (< / span > < span class = "nx" > tmpBuckets< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-109" name = "__codelineno-14-109" href = "#__codelineno-14-109" > < / a >
< a id = "__codelineno-14-110" name = "__codelineno-14-110" href = "#__codelineno-14-110" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-14-111" name = "__codelineno-14-111" href = "#__codelineno-14-111" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > extendRatio< / span >
< a id = "__codelineno-14-112" name = "__codelineno-14-112" href = "#__codelineno-14-112" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "nb" > make< / span > < span class = "p" > ([]< / span > < span class = "nx" > pair< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-113" name = "__codelineno-14-113" href = "#__codelineno-14-113" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > size< / span > < span class = "w" > < / span > < span class = "p" > =< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-14-114" name = "__codelineno-14-114" href = "#__codelineno-14-114" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-14-115" name = "__codelineno-14-115" href = "#__codelineno-14-115" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > tmpBuckets< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-116" name = "__codelineno-14-116" href = "#__codelineno-14-116" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > pair< / span > < span class = "p" > {})< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > removed< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-117" name = "__codelineno-14-117" href = "#__codelineno-14-117" > < / a > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > put< / span > < span class = "p" > (< / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-118" name = "__codelineno-14-118" href = "#__codelineno-14-118" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-119" name = "__codelineno-14-119" href = "#__codelineno-14-119" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-120" name = "__codelineno-14-120" href = "#__codelineno-14-120" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-14-121" name = "__codelineno-14-121" href = "#__codelineno-14-121" > < / a >
< a id = "__codelineno-14-122" name = "__codelineno-14-122" href = "#__codelineno-14-122" > < / a > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-14-123" name = "__codelineno-14-123" href = "#__codelineno-14-123" > < / a > < span class = "kd" > func< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > m< / span > < span class = "w" > < / span > < span class = "o" > *< / span > < span class = "nx" > hashMapOpenAddressing< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "nb" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-124" name = "__codelineno-14-124" href = "#__codelineno-14-124" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "nx" > _< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > :=< / span > < span class = "w" > < / span > < span class = "k" > range< / span > < span class = "w" > < / span > < span class = "nx" > m< / span > < span class = "p" > .< / span > < span class = "nx" > buckets< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-125" name = "__codelineno-14-125" href = "#__codelineno-14-125" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "nx" > pair< / span > < span class = "p" > {})< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-14-126" name = "__codelineno-14-126" href = "#__codelineno-14-126" > < / a > < span class = "w" > < / span > < span class = "nx" > fmt< / span > < span class = "p" > .< / span > < span class = "nx" > Println< / span > < span class = "p" > (< / span > < span class = "nx" > strconv< / span > < span class = "p" > .< / span > < span class = "nx" > Itoa< / span > < span class = "p" > (< / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "nx" > p< / span > < span class = "p" > .< / span > < span class = "nx" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-127" name = "__codelineno-14-127" href = "#__codelineno-14-127" > < / 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-14-128" name = "__codelineno-14-128" href = "#__codelineno-14-128" > < / a > < span class = "w" > < / span > < span class = "nx" > fmt< / span > < span class = "p" > .< / span > < span class = "nx" > Println< / span > < span class = "p" > (< / span > < span class = "s" > " nil" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-14-129" name = "__codelineno-14-129" href = "#__codelineno-14-129" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-130" name = "__codelineno-14-130" href = "#__codelineno-14-130" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-14-131" name = "__codelineno-14-131" href = "#__codelineno-14-131" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.js< / span > < pre > < span > < / span > < code > < a id = "__codelineno-15-1" name = "__codelineno-15-1" href = "#__codelineno-15-1" > < / a > < span class = "p" > [< / span > < span class = "kd" > class< / span > < span class = "p" > ]{< / span > < span class = "nx" > HashMapOpenAddressing< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "nx" > func< / span > < span class = "p" > ]{}< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.ts< / 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 = "kd" > class< / span > < span class = "p" > ]{< / span > < span class = "nx" > HashMapOpenAddressing< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "nx" > func< / span > < span class = "p" > ]{}< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.c< / span > < pre > < span > < / span > < code > < a id = "__codelineno-17-1" name = "__codelineno-17-1" href = "#__codelineno-17-1" > < / a > < span class = "p" > [< / span > < span class = "n" > class< / span > < span class = "p" > ]{< / span > < span class = "n" > hashMapOpenAddressing< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "n" > func< / span > < span class = "p" > ]{}< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.cs< / span > < pre > < span > < / span > < code > < a id = "__codelineno-18-1" name = "__codelineno-18-1" href = "#__codelineno-18-1" > < / a > < span class = "cm" > /* 开放寻址哈希表 */< / span >
< a id = "__codelineno-18-2" name = "__codelineno-18-2" href = "#__codelineno-18-2" > < / a > < span class = "k" > class< / span > < span class = "w" > < / span > < span class = "nc" > HashMapOpenAddressing< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-3" name = "__codelineno-18-3" href = "#__codelineno-18-3" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 键值对数量< / span >
< a id = "__codelineno-18-4" name = "__codelineno-18-4" href = "#__codelineno-18-4" > < / 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 = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-18-5" name = "__codelineno-18-5" href = "#__codelineno-18-5" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-18-6" name = "__codelineno-18-6" href = "#__codelineno-18-6" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-18-7" name = "__codelineno-18-7" href = "#__codelineno-18-7" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-18-8" name = "__codelineno-18-8" href = "#__codelineno-18-8" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 删除标记< / span >
< a id = "__codelineno-18-9" name = "__codelineno-18-9" href = "#__codelineno-18-9" > < / a >
< a id = "__codelineno-18-10" name = "__codelineno-18-10" href = "#__codelineno-18-10" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-18-11" name = "__codelineno-18-11" href = "#__codelineno-18-11" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "nf" > HashMapOpenAddressing< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-12" name = "__codelineno-18-12" href = "#__codelineno-18-12" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-13" name = "__codelineno-18-13" href = "#__codelineno-18-13" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 4< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-14" name = "__codelineno-18-14" href = "#__codelineno-18-14" > < / a > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2.0< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "m" > 3.0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-15" name = "__codelineno-18-15" href = "#__codelineno-18-15" > < / a > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-16" name = "__codelineno-18-16" href = "#__codelineno-18-16" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > Pair< / span > < span class = "p" > [< / span > < span class = "n" > capacity< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-18-17" name = "__codelineno-18-17" href = "#__codelineno-18-17" > < / a > < span class = "w" > < / span > < span class = "n" > removed< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "o" > -< / span > < span class = "m" > 1< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "s" > " -1" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-18" name = "__codelineno-18-18" href = "#__codelineno-18-18" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-19" name = "__codelineno-18-19" href = "#__codelineno-18-19" > < / a >
< a id = "__codelineno-18-20" name = "__codelineno-18-20" href = "#__codelineno-18-20" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-18-21" name = "__codelineno-18-21" href = "#__codelineno-18-21" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "nf" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-22" name = "__codelineno-18-22" href = "#__codelineno-18-22" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-18-23" name = "__codelineno-18-23" href = "#__codelineno-18-23" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-24" name = "__codelineno-18-24" href = "#__codelineno-18-24" > < / a >
< a id = "__codelineno-18-25" name = "__codelineno-18-25" href = "#__codelineno-18-25" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-18-26" name = "__codelineno-18-26" href = "#__codelineno-18-26" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "nf" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-27" name = "__codelineno-18-27" href = "#__codelineno-18-27" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "kt" > double< / span > < span class = "p" > )< / span > < span class = "n" > size< / 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-18-28" name = "__codelineno-18-28" href = "#__codelineno-18-28" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-29" name = "__codelineno-18-29" href = "#__codelineno-18-29" > < / a >
< a id = "__codelineno-18-30" name = "__codelineno-18-30" href = "#__codelineno-18-30" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-18-31" name = "__codelineno-18-31" href = "#__codelineno-18-31" > < / a > < span class = "w" > < / span > < span class = "k" > public< / span > < span class = "w" > < / span > < span class = "kt" > string< / span > < span class = "w" > < / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-32" name = "__codelineno-18-32" href = "#__codelineno-18-32" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-33" name = "__codelineno-18-33" href = "#__codelineno-18-33" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-18-34" name = "__codelineno-18-34" href = "#__codelineno-18-34" > < / 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" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-35" name = "__codelineno-18-35" href = "#__codelineno-18-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-18-36" name = "__codelineno-18-36" href = "#__codelineno-18-36" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-37" name = "__codelineno-18-37" href = "#__codelineno-18-37" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则返回 null< / span >
< a id = "__codelineno-18-38" name = "__codelineno-18-38" href = "#__codelineno-18-38" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > )< / span >
< a id = "__codelineno-18-39" name = "__codelineno-18-39" href = "#__codelineno-18-39" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-40" name = "__codelineno-18-40" href = "#__codelineno-18-40" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则返回对应 val< / span >
< a id = "__codelineno-18-41" name = "__codelineno-18-41" href = "#__codelineno-18-41" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ].< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span >
< a id = "__codelineno-18-42" name = "__codelineno-18-42" href = "#__codelineno-18-42" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ].< / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-43" name = "__codelineno-18-43" href = "#__codelineno-18-43" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-44" name = "__codelineno-18-44" href = "#__codelineno-18-44" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-45" name = "__codelineno-18-45" href = "#__codelineno-18-45" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-46" name = "__codelineno-18-46" href = "#__codelineno-18-46" > < / a >
< a id = "__codelineno-18-47" name = "__codelineno-18-47" href = "#__codelineno-18-47" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-18-48" name = "__codelineno-18-48" href = "#__codelineno-18-48" > < / 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" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > string< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-49" name = "__codelineno-18-49" href = "#__codelineno-18-49" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-18-50" name = "__codelineno-18-50" href = "#__codelineno-18-50" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > loadThres< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-51" name = "__codelineno-18-51" href = "#__codelineno-18-51" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-18-52" name = "__codelineno-18-52" href = "#__codelineno-18-52" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-53" name = "__codelineno-18-53" href = "#__codelineno-18-53" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-54" name = "__codelineno-18-54" href = "#__codelineno-18-54" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-18-55" name = "__codelineno-18-55" href = "#__codelineno-18-55" > < / 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" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-56" name = "__codelineno-18-56" href = "#__codelineno-18-56" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-18-57" name = "__codelineno-18-57" href = "#__codelineno-18-57" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-58" name = "__codelineno-18-58" href = "#__codelineno-18-58" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶、或带有删除标记的桶，则将键值对放入该桶< / span >
< a id = "__codelineno-18-59" name = "__codelineno-18-59" href = "#__codelineno-18-59" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "w" > < / span > < span class = "o" > ||< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-60" name = "__codelineno-18-60" href = "#__codelineno-18-60" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-61" name = "__codelineno-18-61" href = "#__codelineno-18-61" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-62" name = "__codelineno-18-62" href = "#__codelineno-18-62" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-63" name = "__codelineno-18-63" href = "#__codelineno-18-63" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-64" name = "__codelineno-18-64" href = "#__codelineno-18-64" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则更新对应 val< / span >
< a id = "__codelineno-18-65" name = "__codelineno-18-65" href = "#__codelineno-18-65" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ].< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-66" name = "__codelineno-18-66" href = "#__codelineno-18-66" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ].< / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-67" name = "__codelineno-18-67" href = "#__codelineno-18-67" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-68" name = "__codelineno-18-68" href = "#__codelineno-18-68" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-69" name = "__codelineno-18-69" href = "#__codelineno-18-69" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-70" name = "__codelineno-18-70" href = "#__codelineno-18-70" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-71" name = "__codelineno-18-71" href = "#__codelineno-18-71" > < / a >
< a id = "__codelineno-18-72" name = "__codelineno-18-72" href = "#__codelineno-18-72" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-18-73" name = "__codelineno-18-73" href = "#__codelineno-18-73" > < / 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" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-74" name = "__codelineno-18-74" href = "#__codelineno-18-74" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-75" name = "__codelineno-18-75" href = "#__codelineno-18-75" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-18-76" name = "__codelineno-18-76" href = "#__codelineno-18-76" > < / 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" > capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-77" name = "__codelineno-18-77" href = "#__codelineno-18-77" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-18-78" name = "__codelineno-18-78" href = "#__codelineno-18-78" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-79" name = "__codelineno-18-79" href = "#__codelineno-18-79" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则直接返回< / span >
< a id = "__codelineno-18-80" name = "__codelineno-18-80" href = "#__codelineno-18-80" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-81" name = "__codelineno-18-81" href = "#__codelineno-18-81" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-82" name = "__codelineno-18-82" href = "#__codelineno-18-82" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-83" name = "__codelineno-18-83" href = "#__codelineno-18-83" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则标记删除并返回< / span >
< a id = "__codelineno-18-84" name = "__codelineno-18-84" href = "#__codelineno-18-84" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ].< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-85" name = "__codelineno-18-85" href = "#__codelineno-18-85" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-86" name = "__codelineno-18-86" href = "#__codelineno-18-86" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > -=< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-87" name = "__codelineno-18-87" href = "#__codelineno-18-87" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-88" name = "__codelineno-18-88" href = "#__codelineno-18-88" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-89" name = "__codelineno-18-89" href = "#__codelineno-18-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-90" name = "__codelineno-18-90" href = "#__codelineno-18-90" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-91" name = "__codelineno-18-91" href = "#__codelineno-18-91" > < / a >
< a id = "__codelineno-18-92" name = "__codelineno-18-92" href = "#__codelineno-18-92" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-18-93" name = "__codelineno-18-93" href = "#__codelineno-18-93" > < / a > < span class = "w" > < / span > < span class = "k" > private< / span > < span class = "w" > < / span > < span class = "k" > void< / span > < span class = "w" > < / span > < span class = "nf" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-94" name = "__codelineno-18-94" href = "#__codelineno-18-94" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-18-95" name = "__codelineno-18-95" href = "#__codelineno-18-95" > < / a > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "p" > []< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-96" name = "__codelineno-18-96" href = "#__codelineno-18-96" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-18-97" name = "__codelineno-18-97" href = "#__codelineno-18-97" > < / a > < span class = "w" > < / span > < span class = "n" > capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-98" name = "__codelineno-18-98" href = "#__codelineno-18-98" > < / a > < span class = "w" > < / span > < span class = "n" > buckets< / 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" > Pair< / span > < span class = "p" > [< / span > < span class = "n" > capacity< / span > < span class = "p" > ];< / span >
< a id = "__codelineno-18-99" name = "__codelineno-18-99" href = "#__codelineno-18-99" > < / a > < span class = "w" > < / span > < span class = "n" > size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-18-100" name = "__codelineno-18-100" href = "#__codelineno-18-100" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-18-101" name = "__codelineno-18-101" href = "#__codelineno-18-101" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-102" name = "__codelineno-18-102" href = "#__codelineno-18-102" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > removed< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-103" name = "__codelineno-18-103" href = "#__codelineno-18-103" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-104" name = "__codelineno-18-104" href = "#__codelineno-18-104" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-105" name = "__codelineno-18-105" href = "#__codelineno-18-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-106" name = "__codelineno-18-106" href = "#__codelineno-18-106" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-107" name = "__codelineno-18-107" href = "#__codelineno-18-107" > < / a >
< a id = "__codelineno-18-108" name = "__codelineno-18-108" href = "#__codelineno-18-108" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-18-109" name = "__codelineno-18-109" href = "#__codelineno-18-109" > < / 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" > print< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-110" name = "__codelineno-18-110" href = "#__codelineno-18-110" > < / a > < span class = "w" > < / span > < span class = "k" > foreach< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-111" name = "__codelineno-18-111" href = "#__codelineno-18-111" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "k" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-18-112" name = "__codelineno-18-112" href = "#__codelineno-18-112" > < / 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 = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "s" > " -> " < / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-113" name = "__codelineno-18-113" href = "#__codelineno-18-113" > < / 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-18-114" name = "__codelineno-18-114" href = "#__codelineno-18-114" > < / 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" > " null" < / span > < span class = "p" > );< / span >
< a id = "__codelineno-18-115" name = "__codelineno-18-115" href = "#__codelineno-18-115" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-116" name = "__codelineno-18-116" href = "#__codelineno-18-116" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-117" name = "__codelineno-18-117" href = "#__codelineno-18-117" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-18-118" name = "__codelineno-18-118" href = "#__codelineno-18-118" > < / a > < span class = "p" > }< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-07-01 22:39:28 +08:00
< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.swift< / span > < pre > < span > < / span > < code > < a id = "__codelineno-19-1" name = "__codelineno-19-1" href = "#__codelineno-19-1" > < / a > < span class = "cm" > /* 开放寻址哈希表 */< / span >
< a id = "__codelineno-19-2" name = "__codelineno-19-2" href = "#__codelineno-19-2" > < / a > < span class = "kd" > class< / span > < span class = "nc" > HashMapOpenAddressing< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-3" name = "__codelineno-19-3" href = "#__codelineno-19-3" > < / a > < span class = "kd" > var< / span > < span class = "nv" > size< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 键值对数量< / span >
< a id = "__codelineno-19-4" name = "__codelineno-19-4" href = "#__codelineno-19-4" > < / a > < span class = "kd" > var< / span > < span class = "nv" > capacity< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-19-5" name = "__codelineno-19-5" href = "#__codelineno-19-5" > < / a > < span class = "kd" > var< / span > < span class = "nv" > loadThres< / span > < span class = "p" > :< / span > < span class = "nb" > Double< / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-19-6" name = "__codelineno-19-6" href = "#__codelineno-19-6" > < / a > < span class = "kd" > var< / span > < span class = "nv" > extendRatio< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-19-7" name = "__codelineno-19-7" href = "#__codelineno-19-7" > < / a > < span class = "kd" > var< / span > < span class = "nv" > buckets< / span > < span class = "p" > :< / span > < span class = "p" > [< / span > < span class = "n" > Pair< / span > < span class = "p" > ?]< / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-19-8" name = "__codelineno-19-8" href = "#__codelineno-19-8" > < / a > < span class = "kd" > var< / span > < span class = "nv" > removed< / span > < span class = "p" > :< / span > < span class = "n" > Pair< / span > < span class = "c1" > // 删除标记< / span >
< a id = "__codelineno-19-9" name = "__codelineno-19-9" href = "#__codelineno-19-9" > < / a >
< a id = "__codelineno-19-10" name = "__codelineno-19-10" href = "#__codelineno-19-10" > < / a > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-19-11" name = "__codelineno-19-11" href = "#__codelineno-19-11" > < / a > < span class = "kd" > init< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-12" name = "__codelineno-19-12" href = "#__codelineno-19-12" > < / a > < span class = "n" > size< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-19-13" name = "__codelineno-19-13" href = "#__codelineno-19-13" > < / a > < span class = "n" > capacity< / span > < span class = "p" > =< / span > < span class = "mi" > 4< / span >
< a id = "__codelineno-19-14" name = "__codelineno-19-14" href = "#__codelineno-19-14" > < / a > < span class = "n" > loadThres< / span > < span class = "p" > =< / span > < span class = "mi" > 2< / span > < span class = "o" > /< / span > < span class = "mi" > 3< / span >
< a id = "__codelineno-19-15" name = "__codelineno-19-15" href = "#__codelineno-19-15" > < / a > < span class = "n" > extendRatio< / span > < span class = "p" > =< / span > < span class = "mi" > 2< / span >
< a id = "__codelineno-19-16" name = "__codelineno-19-16" href = "#__codelineno-19-16" > < / a > < span class = "n" > buckets< / 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 = "kc" > nil< / 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-19-17" name = "__codelineno-19-17" href = "#__codelineno-19-17" > < / a > < span class = "n" > removed< / span > < span class = "p" > =< / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "o" > -< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "s" > " -1" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-18" name = "__codelineno-19-18" href = "#__codelineno-19-18" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-19" name = "__codelineno-19-19" href = "#__codelineno-19-19" > < / a >
< a id = "__codelineno-19-20" name = "__codelineno-19-20" href = "#__codelineno-19-20" > < / a > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-19-21" name = "__codelineno-19-21" href = "#__codelineno-19-21" > < / a > < span class = "kd" > func< / span > < span class = "nf" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > -> < / span > < span class = "nb" > Int< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-22" name = "__codelineno-19-22" href = "#__codelineno-19-22" > < / a > < span class = "n" > key< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-19-23" name = "__codelineno-19-23" href = "#__codelineno-19-23" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-24" name = "__codelineno-19-24" href = "#__codelineno-19-24" > < / a >
< a id = "__codelineno-19-25" name = "__codelineno-19-25" href = "#__codelineno-19-25" > < / a > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-19-26" name = "__codelineno-19-26" href = "#__codelineno-19-26" > < / a > < span class = "kd" > func< / span > < span class = "nf" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "p" > -> < / span > < span class = "nb" > Double< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-27" name = "__codelineno-19-27" href = "#__codelineno-19-27" > < / a > < span class = "nb" > Double< / span > < span class = "p" > (< / span > < span class = "n" > size< / span > < span class = "o" > /< / span > < span class = "n" > capacity< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-28" name = "__codelineno-19-28" href = "#__codelineno-19-28" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-29" name = "__codelineno-19-29" href = "#__codelineno-19-29" > < / a >
< a id = "__codelineno-19-30" name = "__codelineno-19-30" href = "#__codelineno-19-30" > < / a > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-19-31" name = "__codelineno-19-31" href = "#__codelineno-19-31" > < / a > < span class = "kd" > func< / span > < span class = "nf" > get< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > -> < / span > < span class = "nb" > String< / span > < span class = "p" > ?< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-32" name = "__codelineno-19-32" href = "#__codelineno-19-32" > < / a > < span class = "kd" > let< / span > < span class = "nv" > index< / span > < span class = "p" > =< / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-33" name = "__codelineno-19-33" href = "#__codelineno-19-33" > < / a > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-19-34" name = "__codelineno-19-34" href = "#__codelineno-19-34" > < / a > < span class = "k" > for< / span > < span class = "n" > i< / span > < span class = "k" > in< / span > < span class = "bp" > stride< / span > < span class = "p" > (< / span > < span class = "n" > from< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "n" > to< / span > < span class = "p" > :< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "n" > by< / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-35" name = "__codelineno-19-35" href = "#__codelineno-19-35" > < / a > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-19-36" name = "__codelineno-19-36" href = "#__codelineno-19-36" > < / a > < span class = "kd" > let< / span > < span class = "nv" > j< / span > < span class = "p" > =< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "o" > +< / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-19-37" name = "__codelineno-19-37" href = "#__codelineno-19-37" > < / a > < span class = "c1" > // 若遇到空桶，说明无此 key ，则返回 nil< / span >
< a id = "__codelineno-19-38" name = "__codelineno-19-38" href = "#__codelineno-19-38" > < / a > < span class = "k" > if< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "p" > ==< / span > < span class = "kc" > nil< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-39" name = "__codelineno-19-39" href = "#__codelineno-19-39" > < / a > < span class = "k" > return< / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-19-40" name = "__codelineno-19-40" href = "#__codelineno-19-40" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-41" name = "__codelineno-19-41" href = "#__codelineno-19-41" > < / a > < span class = "c1" > // 若遇到指定 key ，则返回对应 val< / span >
< a id = "__codelineno-19-42" name = "__codelineno-19-42" href = "#__codelineno-19-42" > < / a > < span class = "k" > if< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]?.< / span > < span class = "n" > key< / span > < span class = "p" > ==< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > !=< / span > < span class = "n" > removed< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-43" name = "__codelineno-19-43" href = "#__codelineno-19-43" > < / a > < span class = "k" > return< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]?.< / span > < span class = "n" > val< / span >
< a id = "__codelineno-19-44" name = "__codelineno-19-44" href = "#__codelineno-19-44" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-45" name = "__codelineno-19-45" href = "#__codelineno-19-45" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-46" name = "__codelineno-19-46" href = "#__codelineno-19-46" > < / a > < span class = "k" > return< / span > < span class = "kc" > nil< / span >
< a id = "__codelineno-19-47" name = "__codelineno-19-47" href = "#__codelineno-19-47" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-48" name = "__codelineno-19-48" href = "#__codelineno-19-48" > < / a >
< a id = "__codelineno-19-49" name = "__codelineno-19-49" href = "#__codelineno-19-49" > < / a > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-19-50" name = "__codelineno-19-50" href = "#__codelineno-19-50" > < / a > < span class = "kd" > func< / span > < span class = "nf" > put< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "nb" > String< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-51" name = "__codelineno-19-51" href = "#__codelineno-19-51" > < / a > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-19-52" name = "__codelineno-19-52" href = "#__codelineno-19-52" > < / a > < span class = "k" > if< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "o" > > < / span > < span class = "n" > loadThres< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-53" name = "__codelineno-19-53" href = "#__codelineno-19-53" > < / a > < span class = "bp" > extend< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-19-54" name = "__codelineno-19-54" href = "#__codelineno-19-54" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-55" name = "__codelineno-19-55" href = "#__codelineno-19-55" > < / a > < span class = "kd" > let< / span > < span class = "nv" > index< / span > < span class = "p" > =< / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-56" name = "__codelineno-19-56" href = "#__codelineno-19-56" > < / a > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-19-57" name = "__codelineno-19-57" href = "#__codelineno-19-57" > < / a > < span class = "k" > for< / span > < span class = "n" > i< / span > < span class = "k" > in< / span > < span class = "bp" > stride< / span > < span class = "p" > (< / span > < span class = "n" > from< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "n" > through< / span > < span class = "p" > :< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "n" > by< / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-58" name = "__codelineno-19-58" href = "#__codelineno-19-58" > < / a > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-19-59" name = "__codelineno-19-59" href = "#__codelineno-19-59" > < / a > < span class = "kd" > let< / span > < span class = "nv" > j< / span > < span class = "p" > =< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "o" > +< / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-19-60" name = "__codelineno-19-60" href = "#__codelineno-19-60" > < / a > < span class = "c1" > // 若遇到空桶、或带有删除标记的桶，则将键值对放入该桶< / span >
< a id = "__codelineno-19-61" name = "__codelineno-19-61" href = "#__codelineno-19-61" > < / a > < span class = "k" > if< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "p" > ==< / span > < span class = "kc" > nil< / span > < span class = "o" > ||< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "p" > ==< / span > < span class = "n" > removed< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-62" name = "__codelineno-19-62" href = "#__codelineno-19-62" > < / a > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "p" > =< / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-63" name = "__codelineno-19-63" href = "#__codelineno-19-63" > < / a > < span class = "n" > size< / span > < span class = "o" > +=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-19-64" name = "__codelineno-19-64" href = "#__codelineno-19-64" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-19-65" name = "__codelineno-19-65" href = "#__codelineno-19-65" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-66" name = "__codelineno-19-66" href = "#__codelineno-19-66" > < / a > < span class = "c1" > // 若遇到指定 key ，则更新对应 val< / span >
< a id = "__codelineno-19-67" name = "__codelineno-19-67" href = "#__codelineno-19-67" > < / a > < span class = "k" > if< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]?.< / span > < span class = "n" > key< / span > < span class = "p" > ==< / span > < span class = "n" > key< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-68" name = "__codelineno-19-68" href = "#__codelineno-19-68" > < / a > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]?.< / span > < span class = "n" > val< / span > < span class = "p" > =< / span > < span class = "n" > val< / span >
< a id = "__codelineno-19-69" name = "__codelineno-19-69" href = "#__codelineno-19-69" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-19-70" name = "__codelineno-19-70" href = "#__codelineno-19-70" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-71" name = "__codelineno-19-71" href = "#__codelineno-19-71" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-72" name = "__codelineno-19-72" href = "#__codelineno-19-72" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-73" name = "__codelineno-19-73" href = "#__codelineno-19-73" > < / a >
< a id = "__codelineno-19-74" name = "__codelineno-19-74" href = "#__codelineno-19-74" > < / a > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-19-75" name = "__codelineno-19-75" href = "#__codelineno-19-75" > < / a > < span class = "kd" > func< / span > < span class = "nf" > remove< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "nb" > Int< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-76" name = "__codelineno-19-76" href = "#__codelineno-19-76" > < / a > < span class = "kd" > let< / span > < span class = "nv" > index< / span > < span class = "p" > =< / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > key< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-77" name = "__codelineno-19-77" href = "#__codelineno-19-77" > < / a > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-19-78" name = "__codelineno-19-78" href = "#__codelineno-19-78" > < / a > < span class = "k" > for< / span > < span class = "n" > i< / span > < span class = "k" > in< / span > < span class = "bp" > stride< / span > < span class = "p" > (< / span > < span class = "n" > from< / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span > < span class = "n" > to< / span > < span class = "p" > :< / span > < span class = "n" > capacity< / span > < span class = "p" > ,< / span > < span class = "n" > by< / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-79" name = "__codelineno-19-79" href = "#__codelineno-19-79" > < / a > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-19-80" name = "__codelineno-19-80" href = "#__codelineno-19-80" > < / a > < span class = "kd" > let< / span > < span class = "nv" > j< / span > < span class = "p" > =< / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "o" > +< / span > < span class = "n" > i< / span > < span class = "p" > )< / span > < span class = "o" > %< / span > < span class = "n" > capacity< / span >
< a id = "__codelineno-19-81" name = "__codelineno-19-81" href = "#__codelineno-19-81" > < / a > < span class = "c1" > // 若遇到空桶，说明无此 key ，则直接返回< / span >
< a id = "__codelineno-19-82" name = "__codelineno-19-82" href = "#__codelineno-19-82" > < / a > < span class = "k" > if< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "p" > ==< / span > < span class = "kc" > nil< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-83" name = "__codelineno-19-83" href = "#__codelineno-19-83" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-19-84" name = "__codelineno-19-84" href = "#__codelineno-19-84" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-85" name = "__codelineno-19-85" href = "#__codelineno-19-85" > < / a > < span class = "c1" > // 若遇到指定 key ，则标记删除并返回< / span >
< a id = "__codelineno-19-86" name = "__codelineno-19-86" href = "#__codelineno-19-86" > < / a > < span class = "k" > if< / span > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]?.< / span > < span class = "n" > key< / span > < span class = "p" > ==< / span > < span class = "n" > key< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-87" name = "__codelineno-19-87" href = "#__codelineno-19-87" > < / a > < span class = "n" > buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "p" > =< / span > < span class = "n" > removed< / span >
< a id = "__codelineno-19-88" name = "__codelineno-19-88" href = "#__codelineno-19-88" > < / a > < span class = "n" > size< / span > < span class = "o" > -=< / span > < span class = "mi" > 1< / span >
< a id = "__codelineno-19-89" name = "__codelineno-19-89" href = "#__codelineno-19-89" > < / a > < span class = "k" > return< / span >
< a id = "__codelineno-19-90" name = "__codelineno-19-90" href = "#__codelineno-19-90" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-91" name = "__codelineno-19-91" href = "#__codelineno-19-91" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-92" name = "__codelineno-19-92" href = "#__codelineno-19-92" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-93" name = "__codelineno-19-93" href = "#__codelineno-19-93" > < / a >
< a id = "__codelineno-19-94" name = "__codelineno-19-94" href = "#__codelineno-19-94" > < / a > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-19-95" name = "__codelineno-19-95" href = "#__codelineno-19-95" > < / a > < span class = "kd" > func< / span > < span class = "nf" > extend< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-96" name = "__codelineno-19-96" href = "#__codelineno-19-96" > < / a > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-19-97" name = "__codelineno-19-97" href = "#__codelineno-19-97" > < / a > < span class = "kd" > let< / span > < span class = "nv" > bucketsTmp< / span > < span class = "p" > =< / span > < span class = "n" > buckets< / span >
< a id = "__codelineno-19-98" name = "__codelineno-19-98" href = "#__codelineno-19-98" > < / a > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-19-99" name = "__codelineno-19-99" href = "#__codelineno-19-99" > < / a > < span class = "n" > capacity< / span > < span class = "o" > *=< / span > < span class = "n" > extendRatio< / span >
< a id = "__codelineno-19-100" name = "__codelineno-19-100" href = "#__codelineno-19-100" > < / a > < span class = "n" > buckets< / 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 = "kc" > nil< / 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-19-101" name = "__codelineno-19-101" href = "#__codelineno-19-101" > < / a > < span class = "n" > size< / span > < span class = "p" > =< / span > < span class = "mi" > 0< / span >
< a id = "__codelineno-19-102" name = "__codelineno-19-102" href = "#__codelineno-19-102" > < / a > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-19-103" name = "__codelineno-19-103" href = "#__codelineno-19-103" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "k" > in< / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-104" name = "__codelineno-19-104" href = "#__codelineno-19-104" > < / a > < span class = "k" > if< / span > < span class = "kd" > let< / span > < span class = "nv" > pair< / span > < span class = "p" > ,< / span > < span class = "n" > pair< / span > < span class = "o" > !=< / span > < span class = "n" > removed< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-105" name = "__codelineno-19-105" href = "#__codelineno-19-105" > < / a > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > :< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "n" > val< / span > < span class = "p" > :< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-106" name = "__codelineno-19-106" href = "#__codelineno-19-106" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-107" name = "__codelineno-19-107" href = "#__codelineno-19-107" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-108" name = "__codelineno-19-108" href = "#__codelineno-19-108" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-109" name = "__codelineno-19-109" href = "#__codelineno-19-109" > < / a >
< a id = "__codelineno-19-110" name = "__codelineno-19-110" href = "#__codelineno-19-110" > < / a > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-19-111" name = "__codelineno-19-111" href = "#__codelineno-19-111" > < / a > < span class = "kd" > func< / span > < span class = "nf" > print< / span > < span class = "p" > ()< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-112" name = "__codelineno-19-112" href = "#__codelineno-19-112" > < / a > < span class = "k" > for< / span > < span class = "n" > pair< / span > < span class = "k" > in< / span > < span class = "n" > buckets< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-113" name = "__codelineno-19-113" href = "#__codelineno-19-113" > < / a > < span class = "k" > if< / span > < span class = "kd" > let< / span > < span class = "nv" > pair< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-114" name = "__codelineno-19-114" href = "#__codelineno-19-114" > < / a > < span class = "n" > Swift< / span > < span class = "p" > .< / span > < span class = "bp" > print< / span > < span class = "p" > (< / span > < span class = "s" > " < / span > < span class = "si" > \(< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "si" > )< / span > < span class = "s" > -> < / span > < span class = "si" > \(< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "si" > )< / span > < span class = "s" > " < / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-115" name = "__codelineno-19-115" href = "#__codelineno-19-115" > < / a > < span class = "p" > }< / span > < span class = "k" > else< / span > < span class = "p" > {< / span >
< a id = "__codelineno-19-116" name = "__codelineno-19-116" href = "#__codelineno-19-116" > < / a > < span class = "n" > Swift< / span > < span class = "p" > .< / span > < span class = "bp" > print< / span > < span class = "p" > (< / span > < span class = "s" > " null" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-19-117" name = "__codelineno-19-117" href = "#__codelineno-19-117" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-118" name = "__codelineno-19-118" href = "#__codelineno-19-118" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-119" name = "__codelineno-19-119" href = "#__codelineno-19-119" > < / a > < span class = "p" > }< / span >
< a id = "__codelineno-19-120" name = "__codelineno-19-120" href = "#__codelineno-19-120" > < / a > < span class = "p" > }< / span >
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< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
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< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.zig< / span > < pre > < span > < / span > < code > < a id = "__codelineno-20-1" name = "__codelineno-20-1" href = "#__codelineno-20-1" > < / a > < span class = "p" > [< / span > < span class = "n" > class< / span > < span class = "p" > ]{< / span > < span class = "n" > HashMapOpenAddressing< / span > < span class = "p" > }< / span > < span class = "o" > -< / span > < span class = "p" > [< / span > < span class = "n" > func< / span > < span class = "p" > ]{}< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< div class = "tabbed-block" >
2023-06-26 23:13:50 +08:00
< div class = "highlight" > < span class = "filename" > hash_map_open_addressing.dart< / span > < pre > < span > < / span > < code > < a id = "__codelineno-21-1" name = "__codelineno-21-1" href = "#__codelineno-21-1" > < / a > < span class = "cm" > /* 开放寻址哈希表 */< / span >
< a id = "__codelineno-21-2" name = "__codelineno-21-2" href = "#__codelineno-21-2" > < / a > < span class = "kd" > class< / span > < span class = "w" > < / span > < span class = "nc" > HashMapOpenAddressing< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-3" name = "__codelineno-21-3" href = "#__codelineno-21-3" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < 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 = "c1" > // 键值对数量< / span >
< a id = "__codelineno-21-4" name = "__codelineno-21-4" href = "#__codelineno-21-4" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > _capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 哈希表容量< / span >
< a id = "__codelineno-21-5" name = "__codelineno-21-5" href = "#__codelineno-21-5" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > _loadThres< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 触发扩容的负载因子阈值< / span >
< a id = "__codelineno-21-6" name = "__codelineno-21-6" href = "#__codelineno-21-6" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > _extendRatio< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 扩容倍数< / span >
< a id = "__codelineno-21-7" name = "__codelineno-21-7" href = "#__codelineno-21-7" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > ?> < / span > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 桶数组< / span >
< a id = "__codelineno-21-8" name = "__codelineno-21-8" href = "#__codelineno-21-8" > < / a > < span class = "w" > < / span > < span class = "kd" > late< / span > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "w" > < / span > < span class = "n" > _removed< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "c1" > // 删除标记< / span >
< a id = "__codelineno-21-9" name = "__codelineno-21-9" href = "#__codelineno-21-9" > < / a >
< a id = "__codelineno-21-10" name = "__codelineno-21-10" href = "#__codelineno-21-10" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 构造方法 */< / span >
< a id = "__codelineno-21-11" name = "__codelineno-21-11" href = "#__codelineno-21-11" > < / a > < span class = "w" > < / span > < span class = "n" > HashMapOpenAddressing< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-12" name = "__codelineno-21-12" href = "#__codelineno-21-12" > < / a > < span class = "w" > < / span > < span class = "n" > _size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-13" name = "__codelineno-21-13" href = "#__codelineno-21-13" > < / a > < span class = "w" > < / span > < span class = "n" > _capacity< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 4< / 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" > _loadThres< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2.0< / span > < span class = "w" > < / span > < span class = "o" > /< / span > < span class = "w" > < / span > < span class = "m" > 3.0< / 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 = "n" > _extendRatio< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 2< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-16" name = "__codelineno-21-16" href = "#__codelineno-21-16" > < / a > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "p" > .< / span > < span class = "n" > generate< / span > < span class = "p" > (< / span > < span class = "n" > _capacity< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / 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 >
< a id = "__codelineno-21-17" name = "__codelineno-21-17" href = "#__codelineno-21-17" > < / a > < span class = "w" > < / span > < span class = "n" > _removed< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > Pair< / span > < span class = "p" > (< / span > < span class = "o" > -< / span > < span class = "m" > 1< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "s2" > " -1" < / 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 = "p" > }< / span >
< a id = "__codelineno-21-19" name = "__codelineno-21-19" href = "#__codelineno-21-19" > < / a >
< a id = "__codelineno-21-20" name = "__codelineno-21-20" href = "#__codelineno-21-20" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 哈希函数 */< / span >
< a id = "__codelineno-21-21" name = "__codelineno-21-21" href = "#__codelineno-21-21" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-22" name = "__codelineno-21-22" href = "#__codelineno-21-22" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > key< / 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-21-23" name = "__codelineno-21-23" href = "#__codelineno-21-23" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-24" name = "__codelineno-21-24" href = "#__codelineno-21-24" > < / a >
< a id = "__codelineno-21-25" name = "__codelineno-21-25" href = "#__codelineno-21-25" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 负载因子 */< / span >
< a id = "__codelineno-21-26" name = "__codelineno-21-26" href = "#__codelineno-21-26" > < / a > < span class = "w" > < / span > < span class = "kt" > double< / span > < span class = "w" > < / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-27" name = "__codelineno-21-27" href = "#__codelineno-21-27" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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" > _capacity< / 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 = "p" > }< / span >
< a id = "__codelineno-21-29" name = "__codelineno-21-29" href = "#__codelineno-21-29" > < / a >
< a id = "__codelineno-21-30" name = "__codelineno-21-30" href = "#__codelineno-21-30" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 查询操作 */< / span >
< a id = "__codelineno-21-31" name = "__codelineno-21-31" href = "#__codelineno-21-31" > < / a > < span class = "w" > < / span > < span class = "kt" > String< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "kd" > get< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-32" name = "__codelineno-21-32" href = "#__codelineno-21-32" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / 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 = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-21-34" name = "__codelineno-21-34" href = "#__codelineno-21-34" > < / 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" > _capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-35" name = "__codelineno-21-35" href = "#__codelineno-21-35" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-21-36" name = "__codelineno-21-36" href = "#__codelineno-21-36" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > _capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-37" name = "__codelineno-21-37" href = "#__codelineno-21-37" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则返回 null< / 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" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / 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 = "c1" > // 若遇到指定 key ，则返回对应 val< / span >
< a id = "__codelineno-21-40" name = "__codelineno-21-40" href = "#__codelineno-21-40" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > _removed< / 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 = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / 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-21-42" name = "__codelineno-21-42" href = "#__codelineno-21-42" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-43" name = "__codelineno-21-43" href = "#__codelineno-21-43" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-44" name = "__codelineno-21-44" href = "#__codelineno-21-44" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-45" name = "__codelineno-21-45" href = "#__codelineno-21-45" > < / a >
< a id = "__codelineno-21-46" name = "__codelineno-21-46" href = "#__codelineno-21-46" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 添加操作 */< / span >
< a id = "__codelineno-21-47" name = "__codelineno-21-47" href = "#__codelineno-21-47" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "kt" > String< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-48" name = "__codelineno-21-48" href = "#__codelineno-21-48" > < / a > < span class = "w" > < / span > < span class = "c1" > // 当负载因子超过阈值时，执行扩容< / span >
< a id = "__codelineno-21-49" name = "__codelineno-21-49" href = "#__codelineno-21-49" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > loadFactor< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "o" > > < / span > < span class = "w" > < / span > < span class = "n" > _loadThres< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-50" name = "__codelineno-21-50" href = "#__codelineno-21-50" > < / a > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ();< / span >
< a id = "__codelineno-21-51" name = "__codelineno-21-51" href = "#__codelineno-21-51" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-52" name = "__codelineno-21-52" href = "#__codelineno-21-52" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / 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" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-21-54" name = "__codelineno-21-54" href = "#__codelineno-21-54" > < / 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" > _capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-55" name = "__codelineno-21-55" href = "#__codelineno-21-55" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-21-56" name = "__codelineno-21-56" href = "#__codelineno-21-56" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > _capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-57" name = "__codelineno-21-57" href = "#__codelineno-21-57" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶、或带有删除标记的桶，则将键值对放入该桶< / span >
< a id = "__codelineno-21-58" name = "__codelineno-21-58" href = "#__codelineno-21-58" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "o" > ||< / span > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > _removed< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-59" name = "__codelineno-21-59" href = "#__codelineno-21-59" > < / a > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / 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" > Pair< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-60" name = "__codelineno-21-60" href = "#__codelineno-21-60" > < / a > < span class = "w" > < / span > < span class = "n" > _size< / span > < span class = "w" > < / span > < span class = "o" > +=< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-61" name = "__codelineno-21-61" href = "#__codelineno-21-61" > < / a > < span class = "w" > < / span > < span class = "k" > return< / 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 = "p" > }< / span >
< a id = "__codelineno-21-63" name = "__codelineno-21-63" href = "#__codelineno-21-63" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则更新对应 val< / span >
< a id = "__codelineno-21-64" name = "__codelineno-21-64" href = "#__codelineno-21-64" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-65" name = "__codelineno-21-65" href = "#__codelineno-21-65" > < / a > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > val< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-66" name = "__codelineno-21-66" href = "#__codelineno-21-66" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-67" name = "__codelineno-21-67" href = "#__codelineno-21-67" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-68" name = "__codelineno-21-68" href = "#__codelineno-21-68" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-69" name = "__codelineno-21-69" href = "#__codelineno-21-69" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-70" name = "__codelineno-21-70" href = "#__codelineno-21-70" > < / a >
< a id = "__codelineno-21-71" name = "__codelineno-21-71" href = "#__codelineno-21-71" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 删除操作 */< / span >
< a id = "__codelineno-21-72" name = "__codelineno-21-72" href = "#__codelineno-21-72" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > remove< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / 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 = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > hashFunc< / span > < span class = "p" > (< / span > < span class = "n" > key< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-74" name = "__codelineno-21-74" href = "#__codelineno-21-74" > < / a > < span class = "w" > < / span > < span class = "c1" > // 线性探测，从 index 开始向后遍历< / span >
< a id = "__codelineno-21-75" name = "__codelineno-21-75" href = "#__codelineno-21-75" > < / 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" > _capacity< / span > < span class = "p" > ;< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "o" > ++< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-76" name = "__codelineno-21-76" href = "#__codelineno-21-76" > < / a > < span class = "w" > < / span > < span class = "c1" > // 计算桶索引，越过尾部返回头部< / span >
< a id = "__codelineno-21-77" name = "__codelineno-21-77" href = "#__codelineno-21-77" > < / a > < span class = "w" > < / span > < span class = "kt" > int< / span > < span class = "w" > < / span > < span class = "n" > j< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / span > < span class = "w" > < / span > < span class = "o" > +< / span > < span class = "w" > < / 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" > _capacity< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-78" name = "__codelineno-21-78" href = "#__codelineno-21-78" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到空桶，说明无此 key ，则直接返回< / span >
< a id = "__codelineno-21-79" name = "__codelineno-21-79" href = "#__codelineno-21-79" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / 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 = "p" > {< / span >
< a id = "__codelineno-21-80" name = "__codelineno-21-80" href = "#__codelineno-21-80" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-81" name = "__codelineno-21-81" href = "#__codelineno-21-81" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-82" name = "__codelineno-21-82" href = "#__codelineno-21-82" > < / a > < span class = "w" > < / span > < span class = "c1" > // 若遇到指定 key ，则标记删除并返回< / span >
< a id = "__codelineno-21-83" name = "__codelineno-21-83" href = "#__codelineno-21-83" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "o" > !< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "n" > key< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-84" name = "__codelineno-21-84" href = "#__codelineno-21-84" > < / a > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > [< / span > < span class = "n" > j< / span > < span class = "p" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _removed< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-85" name = "__codelineno-21-85" href = "#__codelineno-21-85" > < / a > < span class = "w" > < / span > < span class = "n" > _size< / span > < span class = "w" > < / span > < span class = "o" > -=< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-86" name = "__codelineno-21-86" href = "#__codelineno-21-86" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-87" name = "__codelineno-21-87" href = "#__codelineno-21-87" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-88" name = "__codelineno-21-88" href = "#__codelineno-21-88" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-89" name = "__codelineno-21-89" href = "#__codelineno-21-89" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-90" name = "__codelineno-21-90" href = "#__codelineno-21-90" > < / a >
< a id = "__codelineno-21-91" name = "__codelineno-21-91" href = "#__codelineno-21-91" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 扩容哈希表 */< / span >
< a id = "__codelineno-21-92" name = "__codelineno-21-92" href = "#__codelineno-21-92" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > extend< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-93" name = "__codelineno-21-93" href = "#__codelineno-21-93" > < / a > < span class = "w" > < / span > < span class = "c1" > // 暂存原哈希表< / span >
< a id = "__codelineno-21-94" name = "__codelineno-21-94" href = "#__codelineno-21-94" > < / a > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "o" > < < / span > < span class = "n" > Pair< / span > < span class = "o" > ?> < / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-95" name = "__codelineno-21-95" href = "#__codelineno-21-95" > < / a > < span class = "w" > < / span > < span class = "c1" > // 初始化扩容后的新哈希表< / span >
< a id = "__codelineno-21-96" name = "__codelineno-21-96" href = "#__codelineno-21-96" > < / a > < span class = "w" > < / span > < span class = "n" > _capacity< / span > < span class = "w" > < / span > < span class = "o" > *=< / span > < span class = "w" > < / span > < span class = "n" > _extendRatio< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-97" name = "__codelineno-21-97" href = "#__codelineno-21-97" > < / a > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > List< / span > < span class = "p" > .< / span > < span class = "n" > generate< / span > < span class = "p" > (< / span > < span class = "n" > _capacity< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > index< / 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 >
< a id = "__codelineno-21-98" name = "__codelineno-21-98" href = "#__codelineno-21-98" > < / a > < span class = "w" > < / span > < span class = "n" > _size< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "m" > 0< / span > < span class = "p" > ;< / span >
< a id = "__codelineno-21-99" name = "__codelineno-21-99" href = "#__codelineno-21-99" > < / a > < span class = "w" > < / span > < span class = "c1" > // 将键值对从原哈希表搬运至新哈希表< / span >
< a id = "__codelineno-21-100" name = "__codelineno-21-100" href = "#__codelineno-21-100" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > bucketsTmp< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-101" name = "__codelineno-21-101" href = "#__codelineno-21-101" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "w" > < / span > < span class = "o" > & & < / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "n" > _removed< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-102" name = "__codelineno-21-102" href = "#__codelineno-21-102" > < / a > < span class = "w" > < / span > < span class = "n" > put< / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-103" name = "__codelineno-21-103" href = "#__codelineno-21-103" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-104" name = "__codelineno-21-104" href = "#__codelineno-21-104" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-105" name = "__codelineno-21-105" href = "#__codelineno-21-105" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-106" name = "__codelineno-21-106" href = "#__codelineno-21-106" > < / a >
< a id = "__codelineno-21-107" name = "__codelineno-21-107" href = "#__codelineno-21-107" > < / a > < span class = "w" > < / span > < span class = "cm" > /* 打印哈希表 */< / span >
< a id = "__codelineno-21-108" name = "__codelineno-21-108" href = "#__codelineno-21-108" > < / a > < span class = "w" > < / span > < span class = "kt" > void< / span > < span class = "w" > < / span > < span class = "n" > printHashMap< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-109" name = "__codelineno-21-109" href = "#__codelineno-21-109" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > Pair< / span > < span class = "o" > ?< / span > < span class = "w" > < / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "k" > in< / span > < span class = "w" > < / span > < span class = "n" > _buckets< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-110" name = "__codelineno-21-110" href = "#__codelineno-21-110" > < / a > < span class = "w" > < / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "p" > (< / span > < span class = "n" > pair< / span > < span class = "w" > < / span > < span class = "o" > !=< / span > < span class = "w" > < / span > < span class = "kc" > null< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-111" name = "__codelineno-21-111" href = "#__codelineno-21-111" > < / a > < span class = "w" > < / span > < span class = "n" > print< / span > < span class = "p" > (< / span > < span class = "s2" > " < / span > < span class = "si" > ${< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > key< / span > < span class = "si" > }< / span > < span class = "s2" > -> < / span > < span class = "si" > ${< / span > < span class = "n" > pair< / span > < span class = "p" > .< / span > < span class = "n" > val< / span > < span class = "si" > }< / span > < span class = "s2" > " < / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-112" name = "__codelineno-21-112" href = "#__codelineno-21-112" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< a id = "__codelineno-21-113" name = "__codelineno-21-113" href = "#__codelineno-21-113" > < / a > < span class = "w" > < / span > < span class = "n" > print< / span > < span class = "p" > (< / span > < span class = "kc" > null< / span > < span class = "p" > );< / span >
< a id = "__codelineno-21-114" name = "__codelineno-21-114" href = "#__codelineno-21-114" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-115" name = "__codelineno-21-115" href = "#__codelineno-21-115" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-116" name = "__codelineno-21-116" href = "#__codelineno-21-116" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< a id = "__codelineno-21-117" name = "__codelineno-21-117" href = "#__codelineno-21-117" > < / a > < span class = "p" > }< / span >
2023-06-14 01:57:52 +08:00
< / code > < / pre > < / div >
< / div >
< / div >
< / div >
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< h3 id = "_2" > 多次哈希< a class = "headerlink" href = "#_2" title = "Permanent link" > ¶ < / a > < / h3 >
2023-06-14 01:57:52 +08:00
< p > 顾名思义，多次哈希方法是使用多个哈希函数 < span class = "arithmatex" > \(f_1(x)\)< / span > , < span class = "arithmatex" > \(f_2(x)\)< / span > , < span class = "arithmatex" > \(f_3(x)\)< / span > , < span class = "arithmatex" > \(\cdots\)< / span > 进行探测。< / p >
< ul >
< li > < strong > 插入元素< / strong > ：若哈希函数 < span class = "arithmatex" > \(f_1(x)\)< / span > 出现冲突，则尝试 < span class = "arithmatex" > \(f_2(x)\)< / span > ，以此类推，直到找到空位后插入元素。< / li >
< li > < strong > 查找元素< / strong > ：在相同的哈希函数顺序下进行查找，直到找到目标元素时返回；或遇到空位或已尝试所有哈希函数，说明哈希表中不存在该元素，则返回 < span class = "arithmatex" > \(\text{None}\)< / span > 。< / li >
< / ul >
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< p > 与线性探测相比，多次哈希方法不易产生聚集，但多个哈希函数会增加额外的计算量。< / p >
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< div class = "admonition note" >
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< p class = "admonition-title" > 编程语言的选择< / p >
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< p > Java 采用链式地址。自 JDK 1.8 以来，当 HashMap 内数组长度达到 64 且链表长度达到 8 时，链表会被转换为红黑树以提升查找性能。< / p >
< p > Python 采用开放寻址。字典 dict 使用伪随机数进行探测。< / p >
< p > Golang 采用链式地址。Go 规定每个桶最多存储 8 个键值对，超出容量则连接一个溢出桶；当溢出桶过多时，会执行一次特殊的等量扩容操作，以确保性能。< / p >
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