js模拟化map结构操作



 //创建map
 function getMap(){//初始化map_，给map_对象增加方法，使map_像个Map 
     var map=new Object();  
     map.put=function(key,value){    map[key]=value;}
     map.get=function(key){    return map[key];}
     map.remove=function(key){    delete map[key];}     
     map.keyset=function(){ 
         var ret=""; 
         for(var p in map){     
             if(!isNaN(p)){  
                 ret+=","; 
                 ret+=p; 
             } 
         }            
         if(ret==""){ 
             return ret.split(","); //empty array 
         }else{ 
             return ret.substring(1).split(",");  
         } 
     };  
     return map; 
 } 

getMap()函数调用:

$(function(){
   var map = getMap();
  map.put("01","一");
  map.put("02","二");  
  var keys=map.keyset();
  for(var i=0;i<keys.length;i++){

   alert(keys[i]);//打印key值
   alert(map.get(keys[i])); //打印value值
  }  
  });