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Update built-in Hash Map

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pull/136/head
danielsss 2 years ago
parent 96a719bba6
commit 18636faf99
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GPG Key ID: 2A5967D8F31A22D2
3 changed files with 91 additions and 42 deletions
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38
codes/typescript/chapter_hashing/array_hash_map.ts
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@ -18,11 +18,11 @@ class Entry {
/* 基于数组简易实现的哈希表 */
class ArrayHashMap {
private readonly bucket: Entry[];
private readonly bucket: Entry | null[];
constructor() {
// 初始化一个长度为 100 的桶（数组）
this.bucket = (new Array(100)).fill(null as any);
this.bucket = (new Array(100)).fill(null);
}
/* 哈希函数 */
@ -39,20 +39,20 @@ class ArrayHashMap {
}
/* 添加操作 */
public put(key: number, val: string) {
public set(key: number, val: string) {
let index = this.hashFunc(key);
this.bucket[index] = new Entry(index, val);
}
/* 删除操作 */
public remove(key: number) {
public delete(key: number) {
let index = this.hashFunc(key);
// 置为 null ，代表删除
this.bucket[index] = null as any;
this.bucket[index] = null;
}
/* 获取所有键值对 */
public entrySet(): Entry[] {
public entries(): Entry[] {
let arr = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
@ -63,7 +63,7 @@ class ArrayHashMap {
}
/* 获取所有键 */
public keySet(): number[] {
public keys(): number[] {
let arr = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
@ -74,7 +74,7 @@ class ArrayHashMap {
}
/* 获取所有值 */
public valueSet(): string[] {
public values(): string[] {
let arr = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
@ -86,7 +86,7 @@ class ArrayHashMap {
/* 打印哈希表 */
public print() {
let entrySet = this.entrySet();
let entrySet = this.entries();
for (const entry of entrySet) {
if (!entry) continue;
console.info(`${entry.key} -> ${entry.val}`);
@ -94,16 +94,16 @@ class ArrayHashMap {
}
}
/* Driver Code */
/* 初始化哈希表 */
const map = new ArrayHashMap();
/* 添加操作 */
// 在哈希表中添加键值对 (key, value)
map.put(12836, '小哈');
map.put(15937, '小啰');
map.put(16750, '小算');
map.put(13276, '小法');
map.put(10583, '小鸭');
map.set(12836, '小哈');
map.set(15937, '小啰');
map.set(16750, '小算');
map.set(13276, '小法');
map.set(10583, '小鸭');
console.info('\n添加完成后，哈希表为\nKey -> Value');
map.print();
@ -114,21 +114,21 @@ console.info('\n输入学号 15937 ，查询到姓名 ' + name);
/* 删除操作 */
// 在哈希表中删除键值对 (key, value)
map.remove(10583);
map.delete(10583);
console.info('\n删除 10583 后，哈希表为\nKey -> Value');
map.print();
/* 遍历哈希表 */
console.info('\n遍历键值对 Key->Value');
for (const entry of map.entrySet()) {
for (const entry of map.entries()) {
console.info(entry.key + ' -> ' + entry.val);
}
console.info('\n单独遍历键 Key');
for (const key of map.keySet()) {
for (const key of map.keys()) {
console.info(key);
}
console.info('\n单独遍历值 Value');
for (const val of map.valueSet()) {
for (const val of map.values()) {
console.info(val);
}

49
codes/typescript/chapter_hashing/hash_map.ts
Unescape View File

@ -0,0 +1,49 @@
/*
* File: hash_map.ts
* Created Time: 2022-12-20
* Author: Daniel (better.sunjian@gmail.com)
*/
class hash_map {
constructor() {
/* 初始化哈希表 */
const map = new Map<number, string>();
/* 添加操作 */
// 在哈希表中添加键值对 (key, value)
map.set(12836, '小哈');
map.set(15937, '小啰');
map.set(16750, '小算');
map.set(13276, '小法');
map.set(10583, '小鸭');
console.info('\n添加完成后，哈希表为\nKey -> Value');
console.info(map);
/* 查询操作 */
// 向哈希表输入键 key ，得到值 value
let name = map.get(15937);
console.info('\n输入学号 15937 ，查询到姓名 ' + name);
/* 删除操作 */
// 在哈希表中删除键值对 (key, value)
map.delete(10583);
console.info('\n删除 10583 后，哈希表为\nKey -> Value');
console.info(map);
/* 遍历哈希表 */
console.info('\n遍历键值对 Key->Value');
for (const [k, v] of map.entries()) {
console.info(k + ' -> ' + v);
}
console.info('\n单独遍历键 Key');
for (const k of map.keys()) {
console.info(k);
}
console.info('\n单独遍历值 Value');
for (const v of map.values()) {
console.info(v);
}
}
}
export {};

46
docs/chapter_hashing/hash_map.md
Unescape View File

@ -139,16 +139,16 @@ comments: true
```typescript title="hash_map.ts"
/* 初始化哈希表 */
const map = new ArrayHashMap();
const map = new Map<number, string>();
/* 添加操作 */
// 在哈希表中添加键值对 (key, value)
map.put(12836, '小哈');
map.put(15937, '小啰');
map.put(16750, '小算');
map.put(13276, '小法');
map.put(10583, '小鸭');
map.set(12836, '小哈');
map.set(15937, '小啰');
map.set(16750, '小算');
map.set(13276, '小法');
map.set(10583, '小鸭');
console.info('\n添加完成后，哈希表为\nKey -> Value');
map.print();
console.info(map);
/* 查询操作 */
// 向哈希表输入键 key ，得到值 value
@ -157,9 +157,9 @@ comments: true
/* 删除操作 */
// 在哈希表中删除键值对 (key, value)
map.remove(10583);
map.delete(10583);
console.info('\n删除 10583 后，哈希表为\nKey -> Value');
map.print();
console.info(map);
```
=== "C"
@ -256,16 +256,16 @@ comments: true
```typescript title="hash_map.ts"
/* 遍历哈希表 */
console.info('\n遍历键值对 Key->Value');
for (const entry of map.entrySet()) {
console.info(entry.key + ' -> ' + entry.val);
for (const [k, v] of map.entries()) {
console.info(k + ' -> ' + v);
}
console.info('\n单独遍历键 Key');
for (const key of map.keySet()) {
console.info(key);
for (const k of map.keys()) {
console.info(k);
}
console.info('\n单独遍历值 Value');
for (const val of map.valueSet()) {
console.info(val);
for (const v of map.values()) {
console.info(v);
}
```
@ -525,11 +525,11 @@ $$
/* 基于数组简易实现的哈希表 */
class ArrayHashMap {
private readonly bucket: Entry[];
private readonly bucket: Entry | null[];
constructor() {
// 初始化一个长度为 100 的桶（数组）
this.bucket = (new Array(100)).fill(null as any);
this.bucket = (new Array(100)).fill(null);
}
/* 哈希函数 */
@ -546,20 +546,20 @@ $$
}
/* 添加操作 */
public put(key: number, val: string) {
public set(key: number, val: string) {
let index = this.hashFunc(key);
this.bucket[index] = new Entry(index, val);
}
/* 删除操作 */
public remove(key: number) {
public delete(key: number) {
let index = this.hashFunc(key);
// 置为 null ，代表删除
this.bucket[index] = null as any;
this.bucket[index] = null;
}
/* 获取所有键值对 */
public entrySet(): Entry[] {
public entries(): Entry[] {
let arr = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
@ -570,7 +570,7 @@ $$
}
/* 获取所有键 */
public keySet(): number[] {
public keys(): number[] {
let arr = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
@ -581,7 +581,7 @@ $$
}
/* 获取所有值 */
public valueSet(): string[] {
public values(): string[] {
let arr = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {

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