Angularjs Check duplicated value in array

Today, We want to share with you Angularjs Check duplicated value in array.In this post we will show you AngularJS find duplicate objects in array, hear for Removing Duplicate Entries from ng-repeat in AngularJS we will give you demo and example for implement.In this post, we will learn about Calculate If Duplicates Exist In An Array Using AngularJS with an example.

Angularjs Check duplicated value in array

There are the Following The simple About Angularjs Check duplicated value in array Full Information With Example and source code.

As I will cover this Post with live Working example to develop underscore js find duplicates in array, so the AngularJS check for duplicate entries for this example is following below.

Implementing our Test Controller

var homeApp = angular.module('homeApp', []);

homeApp.controller('homeController' , function ($scope) {
    $scope.list = [
        { 'name' : "Mobile" },
        { 'name' : "Mobile" },
        { 'name' : "Mobile" },
        { 'name' : "ipod" },
        { 'name' : "Computer" },
        { 'name' : "Computer" },
        { 'name' : "Computer" },
        { 'name' : "iPhone" },
        { 'name' : "Laptop" },
        { 'name' : "Laptop" },
        { 'name' : "Laptop" },
        { 'name' : "iPeed" }
        ];
});

<html ng-app="homeApp">
<head>
    <title>AngularJS Removing Duplicates from ng-repeat</title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.5/angular.min.js"></script>
</head>
<body ng-controller="homeController">
    
    <ul>
        <li ng-repeat="item in list">{{item.name}}</li>
    </ul>
    
    <script src="script.js"></script>
</body>
</html>

Filtering Out Duplicates

var homeApp = angular.module('homeApp', []);

homeApp.filter('unique', function() {
   return function(collection, keyname) {

      var output = [], 
          keys = [];
      
      angular.forEach(collection, function(item) {
          var key = item[keyname];
          if(keys.indexOf(key) === -1) {
              keys.push(key); 
              output.push(item);
          }
      });
      return output;
   };
});

homeApp.controller('homeController' , function ($scope) {
    $scope.list = [
        { 'name' : "Mobile" },
        { 'name' : "Mobile" },
        { 'name' : "Mobile" },
        { 'name' : "ipod" },
        { 'name' : "Computer" },
        { 'name' : "Computer" },
        { 'name' : "Computer" },
        { 'name' : "iPhone" },
        { 'name' : "Laptop" },
        { 'name' : "Laptop" },
        { 'name' : "Laptop" },
        { 'name' : "iPeed" }
        ];
});

Modifying our Index File

<li ng-repeat="product in list | unique : 'name'">{{product.name}}</li>

Filtering by Nested Properties
<li ng-repeat="product in list | unique:'name.nested_property'>{{product.name}}</li>

Angular 6 CRUD Operations Application Tutorials

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