AngularJS Identity Function

AngularJS Identity function is very simple and useful which just returns its arguments. Angular.identity helps to write code in the functional style.

Syntax

angular.identity(value);

AngularJS Identity Function Example

<!DOCTYPE html>        
<html>        
<head> <!-- www.techstrikers.com -->        
<title>AngularJS $scope.identity() Example</title>        
<script SRC="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js"></script>   
 <script> 
  var app = angular.module('IdentityInitialization', [])            
     app.controller('IdentityController', ['$scope', function($scope) {        
       $scope.Url = "www.techstrikers.com";
       
       $scope.getURL1 = function(url) {
          return  url;
        };
       $scope.getURL2 = function(url) {
          return  url;
        };
              
       $scope.getResult = function(fn, val) {
         if (fn) {
          return fn(val);
        } else {
          return angular.identity(val);
        }
        };
        
        $scope.functionOne = function(fn, val) {
          $scope.result = $scope.getResult($scope.getURL1,$scope.Url);
        };
        
        $scope.functionTwo = function(fn, val) {
          $scope.result = $scope.getResult($scope.getURL2,$scope.Url);
        };

     }]);        
</script>        
</head>        
<body style="background-color:#DDE4E9;" ng-app="IdentityInitialization">        
  <fieldset style="background-color:#DDE4E9;">          
    <legend>AngulerJS $scope.identity() Example</legend>          
<div ng-controller="IdentityController">        
<p style="font-family:Arial;color:red;background:steelblue;padding:3px;width:350px;">{{result}}</p>
  
     <input ng-model="Url">    
    <button ng-click="functionOne()">functionOne</button> 
   <button ng-click="functionTwo()">functionTwo</button>
  
      </fieldset>         
</body>        
</html>

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