传统单例模式

gistfile1.js

//传统单例模式

var Singleton = function(name){
	this.name = name;
	this.instance = null;
}
Single.prototype.getName = function(){
	console.log(this.name);
};
Singleton.getInstance = function(name){
	if(!this.instance){
		this.instance = new Singleton(name);
	}
	return this.instance;
};

var a = Singleton.getInstance('sven1');
var b = Singleton.getInstance('sven2');

console.log(a === b) // true