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51 lines
1.4 KiB
JavaScript
51 lines
1.4 KiB
JavaScript
/**
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* File: hashing_search.js
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* Created Time: 2022-12-29
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* Author: Zhuo Qinyue (1403450829@qq.com)
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*/
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const PrintUtil = require("../include/PrintUtil");
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const ListNode = require("../include/ListNode");
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/* 哈希查找（数组） */
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function hashingSearch(map, target) {
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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.has(target) ? map.get(target) : -1;
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}
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/* 哈希查找（链表） */
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function hashingSearch1(map, target) {
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// 哈希表的 key: 目标结点值，value: 结点对象
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// 若哈希表中无此 key ，返回 null
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return map.has(target) ? map.get(target) : null;
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}
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function main() {
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const target = 3;
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/* 哈希查找（数组） */
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const 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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const map = new Map();
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for (let i = 0; i < nums.length; i++) {
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map.set(nums[i], i); // key: 元素，value: 索引
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}
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const index = hashingSearch(map, target);
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console.log("目标元素 3 的索引 = " + index);
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/* 哈希查找（链表） */
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let head = new ListNode().arrToLinkedList(nums)
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// 初始化哈希表
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const map1 = new Map();
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while (head != null) {
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map1.set(head.val, head); // key: 结点值，value: 结点
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head = head.next;
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}
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const node = hashingSearch1(map1, target);
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console.log("目标结点值 3 的对应结点对象为" );
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PrintUtil.printLinkedList(node);
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}
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main();
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