Remove duplicate elements from an array using AngularJS

Last Updated : 01 Oct, 2020

We have given an array and the task is to remove/delete the duplicates from the array using AngularJS.

Approach:

The approach is to use the filter() method and inside the method, the elements which don’t repeat themselves will be returned and the duplicates will be returned only once.
Hence, a unique array will be made.

Example 1: In this example, the character ‘g’ and ‘b’ are removed from the original array.

HTML

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js"> 
    </script> 
  
    <script> 
        var myApp = angular.module("app", []); 
        myApp.controller("controller", function ($scope) { 
            $scope.arr = ['g', 'a', 'b', 'c', 'g', 'b']; 
            $scope.res = []; 
            $scope.remDup = function () { 
                $scope.res = $scope.arr 
                    .filter(function (item, pos) { 
                    return $scope.arr.indexOf(item) == pos; 
                }) 
            }; 
        }); 
    </script> 
</head> 
  
<body style="text-align:center;"> 
    <h1 style="color:green;"> 
        GeeksForGeeks 
    </h1> 
  
  
    <p> 
        Remove duplicate elements from  
        the array in AngularJS 
    </p> 
  
    <div ng-app="app"> 
        <div ng-controller="controller"> 
            Original Array = {{arr}} 
            <br><br> 
            <button ng-click='remDup()'> 
                Click here 
            </button> 
            <br><br> 
            Final Array = {{res}}<br> 
        </div> 
    </div> 
</body> 
  
</html> 

Output:

Example 2: This example does the case-sensitive comparison, so the elements like ‘gfg’ and ‘GFG’ will not be considered as duplicates.

HTML

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js"> 
    </script> 
  
    <script> 
        var myApp = angular.module("app", []); 
        myApp.controller("controller", function ($scope) { 
            $scope.arr = ['gfg', 'GFG',  
                'Gfg', 'gFG', 'gFg', 'gFg']; 
            $scope.res = []; 
            $scope.remDup = function () { 
                $scope.res = $scope.arr 
                    .filter(function (item, pos) { 
                    return $scope.arr.indexOf(item) == pos; 
                }) 
            }; 
        }); 
    </script> 
</head> 
  
<body style="text-align:center;"> 
    <h1 style="color:green;"> 
        GeeksForGeeks 
    </h1> 
  
  
    <p> 
        Remove duplicate elements  
        from the array in AngularJS 
    </p> 
  
    <div ng-app="app"> 
        <div ng-controller="controller"> 
            Original Array = {{arr}} 
            <br> 
            <br> 
            <button ng-click='remDup()'> 
                Click here 
            </button> 
            <br> 
            <br> 
            Final Array = {{res}}<br> 
        </div> 
    </div> 
</body> 
  
</html> 

Output:

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