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1c8b7ef559
* Replace 结点 with 节点 Update the footnotes in the figures * Update mindmap * Reduce the size of the mindmap.png
50 lines
1.5 KiB
Swift
50 lines
1.5 KiB
Swift
/**
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* File: hashing_search.swift
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* Created Time: 2023-01-28
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* Author: nuomi1 (nuomi1@qq.com)
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*/
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import utils
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/* 哈希查找（数组） */
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func hashingSearchArray(map: [Int: Int], target: Int) -> Int {
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// 哈希表的 key: 目标元素，value: 索引
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// 若哈希表中无此 key ，返回 -1
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return map[target, default: -1]
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}
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/* 哈希查找（链表） */
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func hashingSearchLinkedList(map: [Int: ListNode], target: Int) -> ListNode? {
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// 哈希表的 key: 目标节点值，value: 节点对象
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// 若哈希表中无此 key ，返回 null
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return map[target]
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}
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@main
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enum HashingSearch {
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/* Driver Code */
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static func main() {
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let target = 3
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/* 哈希查找（数组） */
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let nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
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// 初始化哈希表
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var map: [Int: Int] = [:]
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for i in nums.indices {
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map[nums[i]] = i // key: 元素，value: 索引
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}
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let index = hashingSearchArray(map: map, target: target)
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print("目标元素 3 的索引 = \(index)")
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/* 哈希查找（链表） */
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var head = ListNode.arrToLinkedList(arr: nums)
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// 初始化哈希表
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var map1: [Int: ListNode] = [:]
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while head != nil {
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map1[head!.val] = head! // key: 节点值，value: 节点
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head = head?.next
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}
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let node = hashingSearchLinkedList(map: map1, target: target)
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print("目标节点值 3 的对应节点对象为 \(node!)")
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}
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}
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