JS之对象数组遍历？

一、js实现遍历对象

<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]();   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=0;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":"123456"}];  
 //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":2000,"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":2000,"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"}]};
    
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>