javascript - json值的长度？

Question

给定这样的数据:

var json = [ 
  { "id": "A", "status":   1, "rank": 30,  "score": 0.1  },
  { "id": "B", "status":   1, "rank": 30,  "score": 0.7  },
  { "id": "C", "status":   1, "rank": 60,  "score": 0.8  },
  { "id": "AB", "status":  1, "rank": 160, "score": 0.6  },
  { "id": "ABC", "status": 1, "rank": 400, "score": 0.2 }
];

如何获取id的长度？

fiddle :http://jsfiddle.net/RBSC9/

---

以下不起作用:

var l = (json[3].id).text().length();
console.log("l = "+ l );

Answer 1

使用 *.lenght

var l = json[3].id.length;
console.log("length["+json[3].id+"] = "+ l );

http://jsfiddle.net/RBSC9/2/