angularjs check if array value is in another array

Issue

I have the problem that I need to find which of the letters in the alphabet is true and which is false.

I can't change the array $available (comes from a response).

indexOf does not work because it looks only at the index values 0 & 1 but it have to look at the values...

any idea how to fix that?

Here my pseudo code:

var $alphabet = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
var $available = [0: 'a', 1: 'b'];
var $templateglossar = [];

  angular.forEach($available, function(letter) {
    if($alphabet.indexOf(letter) > -1) {
      $templateglossar.push(letter => true);
    } else {
      $templateglossar.push(letter => false);
    }
  });

Solution

There are two possible solutions for your issue.

1:

if($alphabet.indexOf($available[letter]) > -1)

2:

angular.forEach($available, function(key, letter) {...});

Answered By - alex kucksdorf