javascritp封装的类似java HashMap的类

function Map(){

	this.init();

};

//map的大小

Map.prototype.size = function(){

	return this._size;

};

//将数据放入map中

Map.prototype.put = function(key,value){

	if(!this.containsKey(key)){

		this.array[key] = value;

		this._size++;

	}

};

//根据key获得map的其中一个value

Map.prototype.get = function(key){

	return this.array[key];

};

//map是否为空集合

Map.prototype.isEmpty = function(){

	return this._size === 0;

};

//map集合是否包含key

Map.prototype.containsKey = function(key){

	return this.array[key]!==undefined?true:false;

};

//移除指定的key

Map.prototype.remove = function(key){

	if(this.containsKey(key)){

		delete this.array[key];

		this._size--;

	}

};

//移除所有集合

Map.prototype.clear = function(){

	this.init();

};

//map集合转化成Array

Map.prototype.toArray = function(){

	return this.array;

};

//初始化map集合

Map.prototype.init = function(){

	this.array = new Array();

	this._size = 0;

	this._keySet = new Array();

};

用法如下：

 

var map = new Map();

map.put("lynn","25");

map.put("min","24");

map.put("min1",0);

map.remove("min");

var arr = map.toArray();

for(var i in arr){

alert(map.get(i));

}