JS遍历对象或者数组

http://blog.csdn.net/joeblackzqq/article/details/49783495

一.纯js实现　　

    <script>  
      var obj = {"player_id":"GS001","event_id":"1","destroy":"97%"};  
      var props = "";  
      for(var p in obj){  
          if(typeof(obj[p])=="function"){  
                obj[p]();  
          }else{  
                props+= p + "=" + obj[p] + " ";  
             }  
      }  
      alert(props);  
    </script>

二.jQuery实现

1.遍历对象　　

    $(function(){  
           var tbody = "";      
        //------------遍历对象 .each的使用-------------  
          //对象语法JSON数据格式(当服务器端回调回来的对象数据格式是json数据格式，必须保证JSON的格式要求，回调的对象必须使用eval函数进行转化（否则将得不到Object）。本文不作详细介绍服务器端回调的数据问题，我们将直接自定义对象)  
        var obj =[{"name":"admin","password":"123456"}];  
        $("#result").html("------------遍历对象 .each的使用-------------");  
          alert(obj);//是个object元素  
        //下面使用each进行遍历  
        $.each(obj,function(n,value) {   
               alert(n+' '+value);  
               var trs = "";  
                 trs += "<tr><td>" + value.name +"</td> <td>" + value.password +"</td></tr>";  
                 tbody += trs;         
               });  
      
             $("#project").append(tbody);  
           
      });

2.遍历数组　　

    $(function(){  
       var tbody = "";  
       //------------遍历数组 .each的使用-------------  
       var anArray = ['one','two','three'];  
       $("#result").html("------------遍历数组 .each的使用-------------");  
             $.each(anArray,function(n,value) {  
               alert(n+' '+value);  
               var trs = "";  
               trs += "<tr><td>" +value+"</td></tr>";  
               tbody += trs;  
             });  
            $("#project").append(tbody);  
         
    });

3.遍历List集合　　

    $(function(){  
      var tbody = "";  
      //------------遍历List集合 .each的使用-------------  
      var obj =[{"name":"zhangsan","password":"123456"},{"name":"lisi","password":"333333"}];  
      $("#result").html("遍历List集合 .each的使用");  
      alert(obj);//是个object元素  
      //下面使用each进行遍历  
      $.each(obj,function(n,value) {   
         alert(n+' '+value);  
         var trs = "";  
         trs += "<tr><td>" +value.name+"</td> <td>" + value.password +"</td></tr>";  
         tbody += trs;         
      });  
      $("#project").append(tbody);  
    });

一个完整的例子,向一个select添加元素　　

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head>  
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
    <script type="text/javascript" src="../js/jquery-1.6.js"></script>  
</head>  
  
<body>  
<script type="text/javascript">  
    var cities = new Array({"id":1,"name":"nanjing"},{"id":2,"name":"shanghai"});  
    function add(){  
        var added = "";  
        $.each(cities,function(n, value){  
            //n表示下标  
            var str = "";  
            str = '<option id=' + value.id + ' value='+ '"' + value.name +  '">' + value.name + '</option>' + '<br/>';  
            added += str;  
        });  
        //alert(added);  
        $("#selector").append(added);  
    }  
  
    function add2(){  
        var added = '';  
        for(var i = 0; i < cities.length; i++ ){  
            var data = "";  
            for(var k in cities[i]){  
              if(typeof(cities[i][k])=="function"){    
                 cities[i][k]();    
              }else{    
                data +=  k + "=" +  cities[i][k] + ' ';    
               }   
            }  
            added += data;  
        }  
        var select = document.getElementById("test");  
        select.innerHTML = added;  
    }  
    $(function(){  
        $("#add").click(function(){  
            add();  
        });  
    });  
</script>  
    <button id="add">显示select</button><br/><br/>  
    <select id="selector">  
    </select>  
    <div id="test">  
    </div>  
  
</body>