如何使用json在json中的数组元素数组内插入值？或者如何在json字符串下的此数组中插入值

Question

queryString = {
  dynInfo : [ {
      dynamicIdQuestionAnswers:[{divid:'',question:'',answer:''}]
  }]
};

This is the Query string. Here dynInfo and dynamicIdQuestionAnswers are both arrays. How do I insert the elements inside the dynamicIdQuestionAnswers array?

Here is what I am trying now. Is it also possible to have array of array in json string?

totalIndex=0;
queryString.dynInfo = [];
queryString.dynInfo.push({});

for(var r=0;r<dynamicQuestionIndex;r++){
    queryString.dynInfo.dynamicIdQuestionAnswers = [];
    queryString.dynInfo.push({});
    queryString.dynInfo[totalIndex].dynamicIdQuestionAnswers[r]['divid'] = "someText";
    queryString.dynInfo[totalIndex].dynamicIdQuestionAnswers[r['question'] = "someText";
    queryString.dynInfo[totalIndex].dynamicIdQuestionAnswers[r]['answer'] = "someText"
}

dynamicQuestionIndex is having some value;

Answer 1

How do I insert the elements inside the dynamicIdQuestionAnswers array?

Sample code

var dynamicQuestionIndex = 3;

var queryString = {};
queryString.dynInfo = [];
queryString.dynInfo.push({});
queryString.dynInfo[0].dynamicIdQuestionAnswers = [];

for (var r = 0; r < dynamicQuestionIndex; r++) {
    queryString.dynInfo[0].dynamicIdQuestionAnswers.push({
        divid: "someText",
        question: "someText",
        answer: "someText"
    });
}

$('c').append('<pre>' + JSON.stringify(queryString, undefined, 2) + '</pre>');

Result

{
    "dynInfo": [{
        "dynamicIdQuestionAnswers": [{
            "divid": "someText",
            "question": "someText",
            "answer": "someText"
        }, {
            "divid": "someText",
            "question": "someText",
            "answer": "someText"
        }, {
            "divid": "someText",
            "question": "someText",
            "answer": "someText"
        }]
    }]
}

Demo

http://jsfiddle.net/3KKBr/1/