How to check if an element exists in an array?

Question

JavaScript

Hello!
It is impossible to make through indexOf.
Here is the code

$scope.selectedEditor = function(user)
            {
                user.originalObject.id = user.originalObject.id * 1;
                if($scope.selectedEditors.indexOf(user.originalObject.id) === -1)
                {
                    $scope.selectedEditors.push({
                        id: user.originalObject.id,
                        label: user.originalObject.label
                    });
                }
                console.log($scope.selectedEditors);
            }

<div id="selectedEditors">
                                <div class="selected_user" ng-repeat="editor in selectedCategory.editors">
                                    <span class="user">{{editor.label}}</span>
                                    <span class="delete_chosen glyphicon glyphicon-remove" ng-click="deleteEditor($index)" title="Удалить"></span>
                                </div>
                            </div>

When adding the same user, this user is added to the array again. And I need to make a check so that the users are not repeated. If there is one already in the array, then do not add it. And if not, then add it.

Answer 1

user you have is an object that is not a primitive, and indexOf will not work with it.
Options:
1) Keep an array with user ids in parallel and check for the presence of id in it
2) Pass through the array and compare each element with a new one by id.
or think of something else