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JavaScript設計模式之單例模式

時間：2021-07-05 19:10:14 阅读：0 評論：0 收藏：0 [點我收藏+]

標簽：rgb turn UNC 單例模式定義 singleton rip 變量一個

　　定義：保证一個类仅有一個实例，并且提供一個全局访问点。

　　其实js实现单例相当简单，使用闭包隐藏私有變量，暴露一個访问点就ok了：

　　

var Singleton = (function(){
　　　  var instance = null;
　　　　function getInstance(){
　　　　　　if(!instance) instance = new Object();
　　　　　　return instance;
　　　　}
　　　　return {
　　　　　　getInstance: getInstance
　　　　}
})();
var a = Singleton.getInstance();
var b = Singleton.getInstance();
a === b; //true

JavaScript設計模式之單例模式

標簽：rgb turn UNC 單例模式定義 singleton rip 變量一個

原文地址：https://www.cnblogs.com/xinxiangbin/p/11774973.html

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