NgRepeat-With-Track-By

<!DOCTYPE html>
<html lang="en-US">
<head>
 <title>Welcome in the Angular JS</title>
 <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.0-rc.1/angular.min.js"></script>
</head>
<body ng-app="sampleApplication">
  <div ng-controller="sampleController" >
     <div ng-repeat="emp in employees">
       {{emp}} 
     </div>
     <div ng-repeat="emp in employees track by $index">
       {{emp}} 
     </div>
  </div>
<script> 
  var app = angular.module("sampleApplication", []); 
  app.controller("sampleController", function($scope) { 
    $scope.employees = ["Ehrlich", "Epictetus", "Favre", "Ehrlich"]; 
  }); 
</script>    
</body>
</html>
Output