使用Javascript访问二维JSON数组

Question

  

可能重复：
  I have a nested data structure / JSON, how can I access a specific value?

我使用的是美国Census API，最终得到了来自jQuery.get（）请求的二维json数组。我的结果（数据）如下所示：

[["P0010001","NAME","state","county","tract"], ["2703","Census Tract 4001.01","17","119","400101"], ["5603","Census Tract 4001.02","17","119","400102"], ["4327","Census Tract 4002","17","119","400200"]]

它看起来就像一个二维javascript数组，但是当我尝试时我无法像访问它一样：

var population = data;
alert(population[1][0]);

有没有办法将json数组转换为javascript数组，或者将其转换为字符串，然后将其放入数组中？

Answer 1

使用JSON.parse：

var population = JSON.parse(data);
alert(population[1][0]);

JsFiddle：http://jsfiddle.net/6CGh8/