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" }
        ];
});

    
    


    
    

        
{{item.name}}
    
    
    

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

{{product.name}}

Filtering by Nested Properties

Remove duplicate elements from an array using AngularJS
To remove duplicate elements from an array using AngularJS, you can use the filter() method in combination with the indexOf() method. Here’s an example:
var myArray = [1, 2, 3, 3, 4, 5, 5];

var uniqueArray = myArray.filter(function(elem, index, self) {
    return index === self.indexOf(elem);
});

console.log(uniqueArray); // Output: [1, 2, 3, 4, 5]

In the example above, we have an array myArray with some duplicate elements. We use the filter() method to create a new array uniqueArray that only contains the unique elements from the original array.
The filter() method takes a function as its argument that determines which elements to include in the new array. In our case, we use the indexOf() method to check if the current element has already appeared earlier in the array. If the index of the current element is the same as the index of its first occurrence, it means the element is unique and we return true to include it in the new array.
Note that the indexOf() method returns the index of the first occurrence of an element in an array. If an element appears multiple times in the array, only its first occurrence is used for comparison. This is why our function correctly removes duplicate elements from the array.
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