使用jQuery解析JSON [2](Parse JSON with jQuery [2])

 我正在尝试使用jQuery从服务器返回的JSON字符串中提醒id和子类别。 
 
 我得到以下JSON字符串。 
 
[{"name":"Technology","id":117,"subcategory":"Machines"},
{"name":"Technology","id":118,"subcategory":"Tools"},
{"name":"Technology","id":119,"subcategory":"Air"}]
 
 我尝试做： 
 
$.getJSON("scene/getSubCategories/Technology",
    {
        format: "json"
    },
    function(data) {
        alert(data);
        $.each(data.object, function(i,object){
            alert(object.id + " " +object.subcategory);
        });
    });
 
 我收到了错误 
 
 
 
 消息：'length'为null或不是对象 
 
 
 行：12 
 
 
 查尔：7740 
 
 
 代码：0 
 
 
 URI： http ： //ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js 
 
 
 我究竟做错了什么？ 
 
 我正在使用jQuery 1.3.2，因为我有一个第三方JavaScript插件，可以使用这个jQuery版本，我无法想象jQuery的两个版本（1.3.2和1.4.3）如何能够共存于同一面。 

I'm trying to alert id and subcategory in JSON string returned from the server using jQuery.
 
I get the following JSON string.
 
[{"name":"Technology","id":117,"subcategory":"Machines"},
{"name":"Technology","id":118,"subcategory":"Tools"},
{"name":"Technology","id":119,"subcategory":"Air"}]
 
I try to do:
 
$.getJSON("scene/getSubCategories/Technology",
    {
        format: "json"
    },
    function(data) {
        alert(data);
        $.each(data.object, function(i,object){
            alert(object.id + " " +object.subcategory);
        });
    });
 
I'm getting the error
 
 
 
Message: 'length' is null or not an object
 
 
Line: 12
 
 
Char: 7740
 
 
Code: 0
 
 
URI: http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js
 
 
What am I doing wrong?
 
I'm using jQuery 1.3.2, because I have a third-party JavaScript plugin which works with this jQuery version, and I can't figure how both (1.3.2 and 1.4.3) versions of jQuery can live together on the same side.

原文：https://stackoverflow.com/questions/4150287