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https://github.com/krahets/hello-algo.git
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b2f0d4603d
* Add Ruby and Kotlin icons Add the avatar of @curtishd * Update README * Synchronize zh-hant and zh versions. * Translate the pythontutor blocks to traditional Chinese * Fix en/mkdocs.yml * Update the landing page of the en version. * Fix the Dockerfile * Refine the en landingpage * Fix en landing page * Reset the README.md
49 lines
No EOL
1.4 KiB
Kotlin
49 lines
No EOL
1.4 KiB
Kotlin
/**
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* File: hashing_search.kt
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* Created Time: 2024-01-25
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* Author: curtishd (1023632660@qq.com)
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*/
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package chapter_searching
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import utils.ListNode
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/* 雜湊查詢（陣列） */
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fun hashingSearchArray(map: Map<Int?, Int>, target: Int): Int {
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// 雜湊表的 key: 目標元素，_val: 索引
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// 若雜湊表中無此 key ，返回 -1
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return map.getOrDefault(target, -1)
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}
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/* 雜湊查詢（鏈結串列） */
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fun hashingSearchLinkedList(map: Map<Int?, ListNode?>, target: Int): ListNode? {
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// 雜湊表的 key: 目標節點值，_val: 節點物件
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// 若雜湊表中無此 key ，返回 null
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return map.getOrDefault(target, null)
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}
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/* Driver Code */
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fun main() {
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val target = 3
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/* 雜湊查詢（陣列） */
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val nums = intArrayOf(1, 5, 3, 2, 4, 7, 5, 9, 10, 8)
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// 初始化雜湊表
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val map = HashMap<Int?, Int>()
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for (i in nums.indices) {
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map[nums[i]] = i // key: 元素，_val: 索引
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}
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val index = hashingSearchArray(map, target)
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println("目標元素 3 的索引 = $index")
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/* 雜湊查詢（鏈結串列） */
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var head = ListNode.arrToLinkedList(nums)
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// 初始化雜湊表
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val map1 = HashMap<Int?, ListNode?>()
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while (head != null) {
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map1[head._val] = head // key: 節點值，_val: 節點
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head = head.next
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}
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val node = hashingSearchLinkedList(map1, target)
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println("目標節點值 3 的對應節點物件為 $node")
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} |