mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-24 21:16:28 +08:00
Update built-in Hash Map
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parent
96a719bba6
commit
18636faf99
3 changed files with 91 additions and 42 deletions
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@ -18,11 +18,11 @@ class Entry {
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/* 基于数组简易实现的哈希表 */
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class ArrayHashMap {
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private readonly bucket: Entry[];
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private readonly bucket: Entry | null[];
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constructor() {
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// 初始化一个长度为 100 的桶(数组)
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this.bucket = (new Array(100)).fill(null as any);
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this.bucket = (new Array(100)).fill(null);
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}
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/* 哈希函数 */
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@ -39,20 +39,20 @@ class ArrayHashMap {
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}
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/* 添加操作 */
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public put(key: number, val: string) {
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public set(key: number, val: string) {
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let index = this.hashFunc(key);
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this.bucket[index] = new Entry(index, val);
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}
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/* 删除操作 */
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public remove(key: number) {
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public delete(key: number) {
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let index = this.hashFunc(key);
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// 置为 null ,代表删除
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this.bucket[index] = null as any;
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this.bucket[index] = null;
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}
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/* 获取所有键值对 */
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public entrySet(): Entry[] {
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public entries(): Entry[] {
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let arr = [];
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for (let i = 0; i < this.bucket.length; i++) {
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if (this.bucket[i]) {
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@ -63,7 +63,7 @@ class ArrayHashMap {
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}
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/* 获取所有键 */
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public keySet(): number[] {
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public keys(): number[] {
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let arr = [];
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for (let i = 0; i < this.bucket.length; i++) {
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if (this.bucket[i]) {
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@ -74,7 +74,7 @@ class ArrayHashMap {
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}
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/* 获取所有值 */
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public valueSet(): string[] {
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public values(): string[] {
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let arr = [];
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for (let i = 0; i < this.bucket.length; i++) {
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if (this.bucket[i]) {
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@ -86,7 +86,7 @@ class ArrayHashMap {
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/* 打印哈希表 */
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public print() {
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let entrySet = this.entrySet();
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let entrySet = this.entries();
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for (const entry of entrySet) {
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if (!entry) continue;
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console.info(`${entry.key} -> ${entry.val}`);
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@ -94,16 +94,16 @@ class ArrayHashMap {
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}
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}
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/* Driver Code */
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/* 初始化哈希表 */
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const map = new ArrayHashMap();
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/* 添加操作 */
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// 在哈希表中添加键值对 (key, value)
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map.put(12836, '小哈');
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map.put(15937, '小啰');
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map.put(16750, '小算');
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map.put(13276, '小法');
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map.put(10583, '小鸭');
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map.set(12836, '小哈');
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map.set(15937, '小啰');
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map.set(16750, '小算');
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map.set(13276, '小法');
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map.set(10583, '小鸭');
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console.info('\n添加完成后,哈希表为\nKey -> Value');
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map.print();
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@ -114,21 +114,21 @@ console.info('\n输入学号 15937 ,查询到姓名 ' + name);
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/* 删除操作 */
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// 在哈希表中删除键值对 (key, value)
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map.remove(10583);
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map.delete(10583);
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console.info('\n删除 10583 后,哈希表为\nKey -> Value');
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map.print();
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/* 遍历哈希表 */
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console.info('\n遍历键值对 Key->Value');
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for (const entry of map.entrySet()) {
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for (const entry of map.entries()) {
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console.info(entry.key + ' -> ' + entry.val);
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}
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console.info('\n单独遍历键 Key');
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for (const key of map.keySet()) {
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for (const key of map.keys()) {
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console.info(key);
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}
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console.info('\n单独遍历值 Value');
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for (const val of map.valueSet()) {
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for (const val of map.values()) {
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console.info(val);
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}
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49
codes/typescript/chapter_hashing/hash_map.ts
Normal file
49
codes/typescript/chapter_hashing/hash_map.ts
Normal file
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@ -0,0 +1,49 @@
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/*
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* File: hash_map.ts
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* Created Time: 2022-12-20
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* Author: Daniel (better.sunjian@gmail.com)
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*/
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class hash_map {
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constructor() {
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/* 初始化哈希表 */
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const map = new Map<number, string>();
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/* 添加操作 */
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// 在哈希表中添加键值对 (key, value)
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map.set(12836, '小哈');
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map.set(15937, '小啰');
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map.set(16750, '小算');
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map.set(13276, '小法');
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map.set(10583, '小鸭');
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console.info('\n添加完成后,哈希表为\nKey -> Value');
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console.info(map);
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/* 查询操作 */
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// 向哈希表输入键 key ,得到值 value
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let name = map.get(15937);
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console.info('\n输入学号 15937 ,查询到姓名 ' + name);
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/* 删除操作 */
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// 在哈希表中删除键值对 (key, value)
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map.delete(10583);
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console.info('\n删除 10583 后,哈希表为\nKey -> Value');
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console.info(map);
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/* 遍历哈希表 */
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console.info('\n遍历键值对 Key->Value');
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for (const [k, v] of map.entries()) {
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console.info(k + ' -> ' + v);
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}
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console.info('\n单独遍历键 Key');
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for (const k of map.keys()) {
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console.info(k);
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}
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console.info('\n单独遍历值 Value');
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for (const v of map.values()) {
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console.info(v);
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}
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}
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}
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export {};
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@ -139,16 +139,16 @@ comments: true
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```typescript title="hash_map.ts"
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/* 初始化哈希表 */
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const map = new ArrayHashMap();
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const map = new Map<number, string>();
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/* 添加操作 */
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// 在哈希表中添加键值对 (key, value)
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map.put(12836, '小哈');
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map.put(15937, '小啰');
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map.put(16750, '小算');
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map.put(13276, '小法');
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map.put(10583, '小鸭');
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map.set(12836, '小哈');
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map.set(15937, '小啰');
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map.set(16750, '小算');
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map.set(13276, '小法');
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map.set(10583, '小鸭');
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console.info('\n添加完成后,哈希表为\nKey -> Value');
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map.print();
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console.info(map);
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/* 查询操作 */
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// 向哈希表输入键 key ,得到值 value
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@ -157,9 +157,9 @@ comments: true
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/* 删除操作 */
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// 在哈希表中删除键值对 (key, value)
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map.remove(10583);
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map.delete(10583);
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console.info('\n删除 10583 后,哈希表为\nKey -> Value');
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map.print();
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console.info(map);
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```
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=== "C"
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@ -256,16 +256,16 @@ comments: true
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```typescript title="hash_map.ts"
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/* 遍历哈希表 */
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console.info('\n遍历键值对 Key->Value');
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for (const entry of map.entrySet()) {
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console.info(entry.key + ' -> ' + entry.val);
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for (const [k, v] of map.entries()) {
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console.info(k + ' -> ' + v);
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}
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console.info('\n单独遍历键 Key');
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for (const key of map.keySet()) {
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console.info(key);
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for (const k of map.keys()) {
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console.info(k);
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}
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console.info('\n单独遍历值 Value');
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for (const val of map.valueSet()) {
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console.info(val);
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for (const v of map.values()) {
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console.info(v);
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}
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```
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@ -525,11 +525,11 @@ $$
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/* 基于数组简易实现的哈希表 */
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class ArrayHashMap {
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private readonly bucket: Entry[];
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private readonly bucket: Entry | null[];
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constructor() {
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// 初始化一个长度为 100 的桶(数组)
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this.bucket = (new Array(100)).fill(null as any);
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this.bucket = (new Array(100)).fill(null);
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}
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/* 哈希函数 */
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@ -546,20 +546,20 @@ $$
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}
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/* 添加操作 */
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public put(key: number, val: string) {
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public set(key: number, val: string) {
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let index = this.hashFunc(key);
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this.bucket[index] = new Entry(index, val);
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}
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/* 删除操作 */
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public remove(key: number) {
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public delete(key: number) {
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let index = this.hashFunc(key);
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// 置为 null ,代表删除
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this.bucket[index] = null as any;
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this.bucket[index] = null;
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}
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/* 获取所有键值对 */
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public entrySet(): Entry[] {
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public entries(): Entry[] {
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let arr = [];
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for (let i = 0; i < this.bucket.length; i++) {
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if (this.bucket[i]) {
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@ -570,7 +570,7 @@ $$
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}
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/* 获取所有键 */
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public keySet(): number[] {
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public keys(): number[] {
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let arr = [];
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for (let i = 0; i < this.bucket.length; i++) {
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if (this.bucket[i]) {
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@ -581,7 +581,7 @@ $$
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}
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/* 获取所有值 */
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public valueSet(): string[] {
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public values(): string[] {
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let arr = [];
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for (let i = 0; i < this.bucket.length; i++) {
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if (this.bucket[i]) {
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