javascript - jSon 对象数

Question

我有一个从 Web 服务返回的字符串 st。我把字符串转成对象，怎么算数呢。里面的数组？ (对于这种情况，它是 2)

var st = "{[{"Name": "fake", "Address": "add"]},[{"Name": "fake", "Address": "add"}]}";  
var json = eval(st);  

json.length 总是返回 1

Answer 1

@coure06 我对您的 JSON 做了一点改动。希望这会有用

var persons = {
    "person1" : {
        "Name": "Adam",
        "Address": "USA" 
    },
    "person2" : {
        "Name": "Jamie",
        "Address": "USA" 
    }
};
var count = 0;
//var count = persons.length;          // wont work
for ( property in persons )          // should return 2
{
   if(persons.hasOwnProperty(property))
   {
      count++;
   }
}

Live example at jsfiddle