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Add the codes of hashmap (#553)

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of chaining and open addressing
This commit is contained in:
Yudong Jin
2023-06-14 02:01:06 +08:00
committed by GitHub
parent d3e597af94
commit 9563965a20
27 changed files with 1280 additions and 207 deletions
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30
codes/typescript/chapter_hashing/array_hash_map.ts
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@ -5,7 +5,7 @@
*/
/* 键值对 Number -> String */
class Entry {
class Pair {
public key: number;
public val: string;
@ -17,7 +17,7 @@ class Entry {
/* 基于数组简易实现的哈希表 */
class ArrayHashMap {
private readonly buckets: (Entry | null)[];
private readonly buckets: (Pair | null)[];
constructor() {
// 初始化数组，包含 100 个桶
@ -32,15 +32,15 @@ class ArrayHashMap {
/* 查询操作 */
public get(key: number): string | null {
let index = this.hashFunc(key);
let entry = this.buckets[index];
if (entry === null) return null;
return entry.val;
let pair = this.buckets[index];
if (pair === null) return null;
return pair.val;
}
/* 添加操作 */
public set(key: number, val: string) {
let index = this.hashFunc(key);
this.buckets[index] = new Entry(key, val);
this.buckets[index] = new Pair(key, val);
}
/* 删除操作 */
@ -51,8 +51,8 @@ class ArrayHashMap {
}
/* 获取所有键值对 */
public entries(): (Entry | null)[] {
let arr: (Entry | null)[] = [];
public entries(): (Pair | null)[] {
let arr: (Pair | null)[] = [];
for (let i = 0; i < this.buckets.length; i++) {
if (this.buckets[i]) {
arr.push(this.buckets[i]);
@ -85,10 +85,10 @@ class ArrayHashMap {
/* 打印哈希表 */
public print() {
let entrySet = this.entries();
for (const entry of entrySet) {
if (!entry) continue;
console.info(`${entry.key} -> ${entry.val}`);
let pairSet = this.entries();
for (const pair of pairSet) {
if (!pair) continue;
console.info(`${pair.key} -> ${pair.val}`);
}
}
}
@ -119,9 +119,9 @@ map.print();
/* 遍历哈希表 */
console.info('\n遍历键值对 Key->Value');
for (const entry of map.entries()) {
if (!entry) continue;
console.info(entry.key + ' -> ' + entry.val);
for (const pair of map.entries()) {
if (!pair) continue;
console.info(pair.key + ' -> ' + pair.val);
}
console.info('\n单独遍历键 Key');
for (const key of map.keys()) {