Create and initialize bidimensional array in javascript

Question

I am trying to create and initialize a bidimensional array in javascript inside an AngularJS application as follows:

$scope.invalidVote = [];
for (var i = 0; i < $scope.arry1.length; i += 1) {
    $scope.answersCount[i] = $scope.arry1[i].arry2.length;

    for(var j = 0; j < $scope.arry1[i].arry2.length; j += 1) {
        $scope.invalidVote[i][j] = false;
    }
}

But it doesn't work, What is the right way to do that?

I presume $scope.arry1 exists and is an array?

JanS
– JanS

2016-03-01 22:10:29 +00:00
Commented Mar 1, 2016 at 22:10 — JanS
– JanS, Commented Mar 1, 2016 at 22:10

JanS · Accepted Answer · 2016-03-01 22:10:43Z

1

try this:

$scope.invalidVote = [];
for (var i = 0; i < $scope.arry1.length; i++) {
    $scope.answersCount[i] = $scope.arry1[i].arry2.length;
    $scope.invalidVote[i] = [];

    for(var j = 0; j < $scope.arry1[i].arry2.length; j++) {
        $scope.invalidVote[i][j] = false;
    }
 }

edited Mar 1, 2016 at 22:10

JanS

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answered Mar 1, 2016 at 22:07

valepu

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3 Comments

JanS Over a year ago

$scope.arry1[i].arry2.length will not work. It should read $scope.arry1[1].length - assuming arry1 is an array of arrays and not an array of objects that all have a property arry2 that is an array

valepu Over a year ago

This is something only the original poster can answer

JanS Over a year ago

You are right. It wouldn't be a 2 dimensional array otherwise, though.

DIEGO CARRASCAL · Accepted Answer · 2016-03-01 22:21:48Z

1

I'm assuming $scope.arry1[i] is an array that contain other arrays and is already fill with values. So your code should look like:

$scope.invalidVote = $scope.arry1;
for (var i = 0; i < $scope.arry1.length; i += 1) 
  {
    $scope.answersCount[i] = $scope.arry1[i].length;
    for(var j = 0; j < $scope.arry1[i].length; j += 1)
      {
        $scope.invalidVote[i][j] = false;
      }
  }

'$scope.invalidVote = $scope.arry1;' declaring "invalidVote" like this ensure it contains the same amount of indexes.

answered Mar 1, 2016 at 22:21

DIEGO CARRASCAL

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