JS遍历对象

1.forEach

var obj = {'0':'a','1':'b','2':'c'};

Object.keys(obj).forEach(function(key){

     console.log(key,obj[key]);

});

2.for in

var obj = {'0':'a','1':'b','2':'c'};

for(var i in obj) {

     console.log(i,":",obj[i]);

}