gistfile1.js

$scope.switchSorting = function() {
  if ($scope.sorting === '-status') {
    return $scope.sorting = '+status';
  } else {
    return $scope.sorting = '-status';
  }
};

$scope.switchSorting = function switchSorting () {
  return $scope.sorting = ($scope.sorting === '-status' ? '+status' : '-status');
};