javascript array within an array error

Question

Hey Guys my goal for this multi dimensional array is to document the answers (right or wrong) for a test that the user is taking. In the beginning the test array is set up. as the user goes throught the questions the app should add to the array. Note: the page doesnt reload, the questions come via ajax.

Here is what i have so far

   var test = new array();

   function nextquestion(){
      var result;

    if (document.getElementById('rb2').checked = true){
  result = 'correct' ;
    }
else{

result = 'incorrect';
}
var num = document.getElementByName('rb').value;

var question =new Array(); 
question1[0]= document.getElementByName('rb').value; //question id    
question1[1]= result;

I want the test array to hold the data like so

   test[0]
  test[1][0] = question 1
  test[1][1] = correct
  test[2][0] = question 4
  test[2][1] = incorrect
  test[3][0] = question 17
  test[3][1] = correct
  test[4][0] = question 12
  test[4][1] = incorrect



  test[0]
  test[1][0] = question 1
  test[1][1] = correct
  test[2][0] = question 2
  test[2][1] = incorrect
  test[3][0] = question 3
  test[3][1] = correct
  test[4][0] = question 4
  test[4][1] = incorrect

also what must i add to the next function to get the value of the question id so that i can + 1 to get the next question from the database

thanks in advance!!

if (document.getElementById('rb2').checked = true) is a problem: don't say .checked = true (assignment), say .checked === true (comparison). Or, given that the .checked property is a boolean you don't need the comparison at all: if (document.getElementById('rb2').checked) {}. Also the first line of your code should reference Array() with a capital "A", or, better: var test = []. — nnnnnn
– nnnnnn, Commented Nov 28, 2011 at 5:12

Adam Rackis · Accepted Answer · 2011-11-28 05:13:13Z

2

If you want elements of your test array to hold other arrays, you have to set that up manually:

var test = [];
test.push([]);
test[0].push("Question 1");
test[0].push(true); //or "correct"

var q1 = test[0][0];
//"Question 1"

var wasQ1Correct = test[0][1];
//true

And so on

answered Nov 28, 2011 at 5:13

Adam Rackis

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