diff --git a/codes/javascript/chapter_searching/hashing_search.js b/codes/javascript/chapter_searching/hashing_search.js new file mode 100644 index 000000000..ebe6a139f --- /dev/null +++ b/codes/javascript/chapter_searching/hashing_search.js @@ -0,0 +1,51 @@ +/** + * File: hashing_search.js + * Created Time: 2022-12-29 + * Author: Zhuo Qinyue (1403450829@qq.com) + */ + +const PrintUtil = require("../include/PrintUtil"); +const ListNode = require("../include/ListNode"); + + +/* 哈希查找(数组) */ +function hashingSearch(map, target) { + // 哈希表的 key: 目标元素,value: 索引 + // 若哈希表中无此 key ,返回 -1 + return map.has(target) ? map.get(target) : -1; +} + +/* 哈希查找(链表) */ +function hashingSearch1(map, target) { + // 哈希表的 key: 目标结点值,value: 结点对象 + // 若哈希表中无此 key ,返回 null + return map.has(target) ? map.get(target) : null; +} + +function main() { + const target = 3; + + /* 哈希查找(数组) */ + const nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]; + // 初始化哈希表 + const map = new Map(); + for (let i = 0; i < nums.length; i++) { + map.set(nums[i], i); // key: 元素,value: 索引 + } + const index = hashingSearch(map, target); + console.log("目标元素 3 的索引 = " + index); + + /* 哈希查找(链表) */ + let head = new ListNode().arrToLinkedList(nums) + // 初始化哈希表 + const map1 = new Map(); + while (head != null) { + map1.set(head.val, head); // key: 结点值,value: 结点 + head = head.next; + } + const node = hashingSearch1(map1, target); + console.log("目标结点值 3 的对应结点对象为" ); + PrintUtil.printLinkedList(node); +} + +main(); diff --git a/codes/typescript/chapter_searching/hashing_search.ts b/codes/typescript/chapter_searching/hashing_search.ts new file mode 100644 index 000000000..7f93d7178 --- /dev/null +++ b/codes/typescript/chapter_searching/hashing_search.ts @@ -0,0 +1,51 @@ +/** + * File: hashing_search.js + * Created Time: 2022-12-29 + * Author: Zhuo Qinyue (1403450829@qq.com) + */ + +import { printLinkedList } from "../module/PrintUtil"; +import ListNode from "../module/ListNode"; + + +/* 哈希查找(数组) */ +function hashingSearch(map: Map, target: number): number { + // 哈希表的 key: 目标元素,value: 索引 + // 若哈希表中无此 key ,返回 -1 + return map.has(target) ? map.get(target) as number : -1; +} + +/* 哈希查找(链表) */ +function hashingSearch1(map: Map, target: number): ListNode | null { + // 哈希表的 key: 目标结点值,value: 结点对象 + // 若哈希表中无此 key ,返回 null + return map.has(target) ? map.get(target) as ListNode : null; +} + +function main() { + const target = 3; + + /* 哈希查找(数组) */ + const nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]; + // 初始化哈希表 + const map = new Map(); + for (let i = 0; i < nums.length; i++) { + map.set(nums[i], i); // key: 元素,value: 索引 + } + const index = hashingSearch(map, target); + console.log("目标元素 3 的索引 = " + index); + + /* 哈希查找(链表) */ + let head = new ListNode().arrToLinkedList(nums) + // 初始化哈希表 + const map1 = new Map(); + while (head != null) { + map1.set(head.val, head); // key: 结点值,value: 结点 + head = head.next; + } + const node = hashingSearch1(map1, target); + console.log("目标结点值 3 的对应结点对象为"); + printLinkedList(node); +} + +main(); diff --git a/codes/typescript/module/ListNode.ts b/codes/typescript/module/ListNode.ts index 84f1822f8..fae30d48a 100644 --- a/codes/typescript/module/ListNode.ts +++ b/codes/typescript/module/ListNode.ts @@ -16,12 +16,12 @@ export default class ListNode { } /** - * Generate a linked-list with an array + * Generate a linked list with an array * @param arr - * @return ListNode + * @return */ - public static arrToLinkedList(arr: number[]): ListNode | null { - const dum = new ListNode(0); + arrToLinkedList(arr: number[]): ListNode | null { + const dum: ListNode = new ListNode(0); let head = dum; for (const val of arr) { head.next = new ListNode(val); diff --git a/docs/chapter_searching/hashing_search.md b/docs/chapter_searching/hashing_search.md index 076457303..9f3d74c0c 100644 --- a/docs/chapter_searching/hashing_search.md +++ b/docs/chapter_searching/hashing_search.md @@ -68,13 +68,23 @@ comments: true === "JavaScript" ```js title="hashing_search.js" - + /* 哈希查找(数组) */ + function hashingSearch(map, target) { + // 哈希表的 key: 目标元素,value: 索引 + // 若哈希表中无此 key ,返回 -1 + return map.has(target) ? map.get(target) : -1; + } ``` === "TypeScript" ```typescript title="hashing_search.ts" - + /* 哈希查找(数组) */ + function hashingSearch(map: Map, target: number): number { + // 哈希表的 key: 目标元素,value: 索引 + // 若哈希表中无此 key ,返回 -1 + return map.has(target) ? map.get(target) as number : -1; + } ``` === "C" @@ -151,19 +161,29 @@ comments: true } else { return nil } - } + } ``` === "JavaScript" ```js title="hashing_search.js" - + /* 哈希查找(链表) */ + function hashingSearch1(map, target) { + // 哈希表的 key: 目标结点值,value: 结点对象 + // 若哈希表中无此 key ,返回 null + return map.has(target) ? map.get(target) : null; + } ``` === "TypeScript" ```typescript title="hashing_search.ts" - + /* 哈希查找(链表) */ + function hashingSearch1(map: Map, target: number): ListNode | null { + // 哈希表的 key: 目标结点值,value: 结点对象 + // 若哈希表中无此 key ,返回 null + return map.has(target) ? map.get(target) as ListNode : null; + } ``` === "C"