Javascript 中类似Map集合的实现键值对

    我从网上找了一些资料  如何实现javascript中的map 集合

注明：此代码也是从网上搜集过来的并且将其稍微改进了点,如有雷同请勿喷.

   很感谢 提供基础代码的人.希望看到的人也能将其更加晚上然后共享给大家;

进入主题：代码如下

var Map = function() {
	this.elements = new Array();

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

	this.isEmpty = function() {
		return (this.elements.length < 1);
	}

	this.clear = function() {
		this.elements.length = 0;
	}

	this.put = function(_key, _value) {
		this.elements.push( {
			key : _key,
			value : _value
		});
	}

	this.remove = function(_key) {
		try {
			for ( var i = 0; i < this.size(); i++) {

				if (this.elements[i].key == _key)
					this.elements.splice(i, 1);
				return true;
			}
		} catch (e) {
			return false;
		}
		return false;
	}

	this.get = function(_key) {
		
		try {
			for ( var i = 0; i < this.size(); i++) {
				if (this.elements[i].key == _key) {
					var _value = this.elements[i].value;
					return _value;
				}
			}
		} catch (e) {
			return null;
		}
		return null;
	}
	
	this.containsKey=function(_key){
		try {
			for ( var i = 0; i < this.size(); i++) {
				if (this.elements[i].key == _key) {
					return true;
				}
			}
		} catch (e) {
			return false;
		}
		return false;
	}

	
	this.getValues=function(){
		var values=new Array();
		try {
			for ( var i = 0; i < this.size(); i++) {
				values.push(this.elements[i].key);
			}
		} catch (e) {
			alert("Can not get Map Values ! {1}"+e.message);
			return null;
		}
		return values;
	}
	
	this.getKeys=function(){
		var keys=new Array();
		try {
			for ( var i = 0; i < this.size(); i++) {
				keys.push(this.elements[i].values);
			}
		} catch (e) {
			alert("Can not get Map Keys ! {1}"+e.message);
			return null;
		}
		return keys;
	}
	
	this.mapStr=function(){
		return this.elements.toString();
		
	} 
	
}