JS自定义Map对象

/**
 * JS自定义Map对象
 * @constructor
 */
function ArrayMap(){
    this.data = new Array();

    this.put = function(key,value){
        this.data[key] = value;
    };

    this.get = function(key){
        return this.data[key];
    };

    this.remove = function(key){
        this.data[key] = null;
    };

    this.isEmpty = function(){
        return this.data.length == 0;
    };

    this.size = function(){
        return this.data.length;
    };
}

//使用示例
/**
 var map = new ArrayMap();
 map.put("CN", "China");
 map.put("EN", "English");
 map.get("CN");
 **/