js实现的map

/**
 * js实现的map
 * Author：penghuaiyi
 * Date:2009-06-04
*/
 
 //定义map
 function Map()
 { 
    this.container = {}; 
 } 

 //将key-value放入map中
 Map.prototype.put = function(key,value){ 
  try{ 
    
    if(key!=null && key != "")
       this.container[key] = value; 

   }catch(e){ 
     return e; 
    } 
 }; 

 //根据key从map中取出对应的value
 Map.prototype.get = function(key){ 
  try{ 

     return this.container[key]; 

  }catch(e){ 
     return e; 
  } 
 }; 

 //判断map中是否包含指定的key
 Map.prototype.containsKey=function(key){

  try{
      for(var p in this.container)
	  {
         if(this.p==key)
		    return true;
	  }

	  return false;
 
  }catch(e){
      return e;
  }

}

 //判断map中是否包含指定的value
 Map.prototype.containsValue = function(value){ 
  try{ 

   for(var p in this.container)
   { 
     if(this.container[p] === value) 
        return true; 
    } 

    return false; 

 }catch(e){ 
    return e; 
 } 
 }; 


 //删除map中指定的key
 Map.prototype.remove = function(key){ 
  try{ 

     delete this.container[key]; 
 
   }catch(e){ 
     return e; 
   } 
 }; 

  //清空map
  Map.prototype.clear = function(){ 
   try{ 
     delete this.container; 
     this.container = {}; 

    }catch(e){ 
       return e; 
    } 
  }; 

  //判断map是否为空
  Map.prototype.isEmpty = function(){ 
    
	if(this.keyArray().length==0)
	   return true;
	else 
	   return false;
  }; 
  
  //获取map的大小
  Map.prototype.size=function(){
  
     return this.keyArray().length;
  }

  //返回map中的key值数组
  Map.prototype.keyArray=function(){

	   var keys=new Array();
	   for(var p in this.container)
	   {
	       keys.push(p);
	   }
	
	   return keys;
 }

  //返回map中的value值数组
  Map.prototype.valueArray=function(){
   
	   var values=new Array();
	   var keys=this.keyArray();
	   for(var i=0;i<keys.length;i++)
	   {
	      values.push(this.container[keys[i]]);
	   }
	   
	   return values;
  }