JS之对象数组遍历？

一、js实现遍历对象

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

　　遍历数组

<script type="text/javascript">
//比如
var values=["北京","天津"];
//遍历1 

for(var i=;i<values.length;i++){  只能用于数组 因为对象没有长度值
 alert(values[i]);
 } 

//遍历2 

for(var ele in values){   
 alert(values[ele]);//下标

 } </script>

二、JQuery遍历

遍历数组

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

});  

遍历对象

$(function(){
  //------------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":""}];
 //下面使用each进行遍历
    $.each(obj,function(n,value) {
           alert(n+' '+value);
             trs += "<tr><td>" + value.name +"</td> <td>" + value.password +"</td></tr>";
           });         

  }); 

多为数组遍历

<script>
$(function(){
    var summ={"errno":,"errstr":"","content":[{"city":"52","region_name":"\u5317\u4eac"},{"city":"138","region_name":"\u77f3\u5bb6\u5e84"},{"city":"180","region_name":"\u6b66\u6c49"},{"city":"197","region_name":"\u957f\u6c99"},{"city":"343","region_name":"\u5929\u6d25"}]};
    $.each(summ,function(v,value){
        if (typeof value=="object") {
            $.each(value,function(vv,values){
                alert(values.region_name);
            })            

        }else{
            alert(value);
        };

    })
})
</script>

for(k in arr){} 实现

<script>
    var summ={"errno":,"errstr":"","content":[{"city":"","region_name":"\u5317\u4eac"},{"city":"","region_name":"\u77f3\u5bb6\u5e84"},{"city":"","region_name":"\u6b66\u6c49"},{"city":"","region_name":"\u957f\u6c99"},{"city":"","region_name":"\u5929\u6d25"}]};

for (var k in summ) {
    if (typeof summ[k]=="object") {
        for (var n in summ[k]) {
            alert(summ[k][n].city);
            alert(summ[k][n].region_name);
        };
    }else{
        alert(summ[k]);
    };

};
</script>