AngularJS ng-repeat Index

<!DOCTYPE html>
<html>

<head>
    <title></title>
    <meta charset="utf-8" />
    <script src="Scripts/angular.js"></script>
    <script>
    var app = angular.module('app', []);
    app.controller("MyCtrl", function($scope)
    {
        $scope.isSet = function(index)

        {
            return index % 2 === 0;
        };
    })
    </script>
    <style>
    .active
    {
        color: red;
    }
    </style>
</head>

<body ng-app="app" ng-controller="MyCtrl">
    <div>
        <div ng-repeat="i in [1,2,3,4,5]" ng-class="{'active': isSet($index)}">{{i}}</div>
    </div>
</body>

</html>