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Update 171.精读《设计模式 - Singleton 单例模式》.md

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代码示例问题调整，静态方法不允许使用this，调整静态类中this, 实例化属性采用静态属性。
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ethan guo 2023-12-05 13:56:49 +08:00 committed by GitHub
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设计模式/171.精读《设计模式 - Singleton 单例模式》.md
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@ -51,17 +51,17 @@ Redux 数据流的 `connect` 装饰器就是全局访问点的一种设计。
```typescript
class Ball {
private _instance = undefined
private static _instance: Ball;
// 构造函数申明为 private，就可以阻止 new Ball() 行为
private constructor() {}
public static getInstance = () => {
if (this._instance === undefined) {
this._instance = new Ball()
public static getInstance() {
if (Ball._instance === undefined) {
Ball._instance = new Ball();
}
return this._instance
return Ball._instance;
}
}