怎么用js生成二维json？

Question

像这样格式的json：{{"a":1,"b":2},{"c":3,"d":4}}
而且要元素个数不固定。

Answer 1

var json = [{"a":1,"b":2},{"c":3,"d":4}];

Answer 2

我的意思是：{"a":1,"b":2}这个元素的个数不固定，有可能生成了以后还要修改/添加。
即：有可能是[{"a":1,"b":2},{"c":3,"d":4}]，也有可能是[{"a":1,"b":2},{"c":3,"d":4},{"c":3,"d":4}],也有可能是[{"a":1,"b":2},{"c":3,"d":4},{"c":3,"d":4},{"a":1,"b":2}]。然后还有可能在生成之后删掉其中n组元素，变成：[{"a":1,"b":2}]，也可能增加n组元素，变成：[{"a":1,"b":2},{"c":3,"d":4},{"c":3,"d":4},{"a":1,"b":2},{"a":1,"b":2},{"c":3,"d":4},{"c":3,"d":4},{"a":1,"b":2}]。

Answer 3

var json = [{"a":1,"b":2},{"c":3,"d":4}];//增加
var o = {"a": 5, "b":6};
json.push(o);//删除
json.splice(1, 1);

Answer 4

HTML 代码:
<p id="results"><b>Results: </b> </p>
<form>
  <select name="single">
    <option>Single</option>
    <option>Single2</option>
  </select>
  <select name="multiple" multiple="multiple">
    <option selected="selected">Multiple</option>
    <option>Multiple2</option>
    <option selected="selected">Multiple3</option>
  </select><br/>
  <input type="checkbox" name="check" value="check1"/> check1
  <input type="checkbox" name="check" value="check2" checked="checked"/> check2
  <input type="radio" name="radio" value="radio1" checked="checked"/> radio1
  <input type="radio" name="radio" value="radio2"/> radio2
</form>jQuery 代码:
$("#results").append( "<tt>" + $("form").serialize() + "</tt>" );jQuery手册：Ajax->其它->Stringserialize()