jquery - 我如何使用 jQuery 循环这个 JSON 结果？

Question

我正在尝试循环以下 JSON，但我不知道如何将循环映射到正确的数据项。

警告data[0].ID等...不断返回undefined，例如:

{
    "COLUMNS":
        ["ID","NAME","USECOUNT","EXCERPT"],
    "DATA":
        [
            [1443,"foo",20,null],
            [810,"bar",10,null],
            [690,"foobar",10,null]
        ]
} 

Answer 1

var obj = {
    "COLUMNS":
        ["ID","NAME","USECOUNT","EXCERPT"],
    "DATA":
        [
            [1443,"foo",20,null],
            [810,"bar",10,null],
            [690,"foobar",10,null]
        ]
}; 

// assuming you are interested only in the first elements of each DATA array
$.each(obj.DATA, function(i, val) {
    alert(val[0]); 
});

http://jsfiddle.net/AbVme/