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Use tricky method to resolve type check

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danielsss 2022-12-26 17:01:22 +11:00
parent 5724719485
commit 305915270a
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1 changed files with 10 additions and 9 deletions
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19
codes/typescript/chapter_hashing/array_hash_map.ts
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@ -18,7 +18,7 @@ class Entry {
/* 基于数组简易实现的哈希表 */
class ArrayHashMap {
private readonly bucket: Entry | null[];
private readonly bucket: (Entry | null)[];
constructor() {
// 初始化一个长度为 100 的桶（数组）
@ -52,8 +52,8 @@ class ArrayHashMap {
}
/* 获取所有键值对 */
public entries(): Entry[] {
let arr = [];
public entries(): (Entry | null)[] {
let arr: (Entry | null)[] = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
arr.push(this.bucket[i]);
@ -63,22 +63,22 @@ class ArrayHashMap {
}
/* 获取所有键 */
public keys(): number[] {
let arr = [];
public keys(): (number | undefined)[] {
let arr: (number | undefined)[] = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
arr.push(this.bucket[i].key);
arr.push(this.bucket[i]?.key);
}
}
return arr;
}
/* 获取所有值 */
public values(): string[] {
let arr = [];
public values(): (string | undefined)[] {
let arr: (string | undefined)[] = [];
for (let i = 0; i < this.bucket.length; i++) {
if (this.bucket[i]) {
arr.push(this.bucket[i].val);
arr.push(this.bucket[i]?.val);
}
}
return arr;
@ -121,6 +121,7 @@ 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);
}
console.info('\n单独遍历键 Key');