get count of items with some property in an array

Question

I have an array of objects as follow.

$scope.students = [{\'isSelected\': true},
    {\'isSelected\': true},
    {\'isSelected\': false},
    {\'isSelected\':         


        

Answer 1

You could also use javascript filter method (see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter)

$scope.selectedStudentsCount = function() {
  return $scope.students.filter(function(obj){return obj.isSelected}).length;
}