adding an element to JSON Array JavaScript -

i have following array in source code:

var employees = [ {   "question":"question 1",   "answer":"answer 1" },  {   "question":"question 1",   "answer":"another answer 1" }, {   "question":"question 2",   "answer":"answer 2" } ]; 

i need create function can group answers related same question , put info in json object

{   "question":"question 1",   "answer" : '[{"answer 1","another answer 1"}]' },  {   "question":"question 2",   "answer" : '[{"answer2"}]' } 

as said in comments, wrote answers strings not array of strings.

what may want acheive :

var employees = [   {     "question":"question 1",     "answers": ["answer 1"]   },    {     "question":"question 2",     "answers": ["answer 2", "some other answer", "... etc"]   } ];  // add answers question 1 employees[0].answers.push('a new anwser 1');  // add anwers question 2 employees[1].answers.push('a new answer 2');  // ... , on 

that's how see if want clean way add answers , have answers related questions directly

now function :

var employees = [    {      "question":"question 1",      "answer":"answer 1"    },     {      "question":"question 1",      "answer":"another answer 1"    },    {      "question":"question 2",      "answer":"answer 2"    }  ];    function groupanswerstoquestions(employees){    var questions = [], result = [];      // set questions same string same key      for(var k in employees){      // set question array if not set yet      var q = employees[k].question;      if( ! questions[q]) questions[q] = [];        // add answer array      questions[q].push(employees[k].answer);    }      // re render new array wanted structure      for(var k2 in questions){      result.push({ question: k2, answers: questions[k2] });    }      return result;  }    alert( json.stringify( groupanswerstoquestions(employees), null, 2) );