JS 数据存储

      /* 字典目录 数据存储 */
      var editData = {
       
      };
      editData.data = {};
      editData.Add = function (key, obj) {
          editData.data[key] = obj
      };
      
      editData.GetData = function ()
      {
          var data = editData.data;
          for (var key in editData.data)
              alert(key+":"+data[key]);
      };
      editData.Delete = function (key) {
         delete  editData.data[key];
      };

      editData.Add("a1", 1);
      editData.Add("a2", 2);
      editData.Add("a3", 3);
      editData.Add("a4", 4);
      editData.GetData();
      editData.Delete("a3");
      editData.GetData();

 定义对象  输出JSON对象数据不同状态

  /* JSON.stringify：  <script  type="text/javascript" src="https://raw.github.com/douglascrockford/JSON-js/master/json.js"></script>*/

     var  j_str="[{key:\"key1\",val:11},{key:\"key2\",val:12},{key:\"key3\",val:13}]";
     var jsonObj=eval('('+j_str+')');
     var  len=jsonObj.length;
    
     // 输出 len= 3

     var  jobj={};
     jobj[0]={};
     jobj[0].key="key1";
     jobj[0].val=1;
     
     jobj[1]={};
     jobj[1].key="key2";
     jobj[1].val=2;
      
     jobj[2]={};
     jobj[2].key="key3";
     jobj[2].val=3;
     var str=JSON.stringify(jobj);
    
      /*
        str=[{"key":"key1","val":1},{"key":"key2","val":2},{"key":"key3","val":3}]
    
       将 var  jobj=new Array();  
        换成 var  jobj={};  
        JSON.stringify(jobj)
        则 输出：{"0":{"key":"key1","val":1},"1":{"key":"key2","val":2},"2":{"key":"key3","val":3}}
     */