angular.module('app',[]).controller("controllername", ["$scope", function($scope) {
$scope.getLanguages = [
{"en":"English"},
{"fr":"French"}
];

 $scope.getKey = function(getLanguages) {
return Object.keys(getLanguages)[0];
 }
 }]);

angular.module('app', []).controller("controllername", ["$scope", function($scope) {
    $scope.getLanguages = [
        {"en":"English"},
        {"fr":"French"}
    ];

    $scope.getKey = function(getLanguages) {
        return Object.keys(getLanguages)[0];
    }
}]);