function TodoCrtl($scope, $timeout, $q) {

  $scope.numbers = [];

  $scope.action = function () {

    var promises = [];

    for (var i=0;i < 10 ; i ++) {

      // This should only accept a 

      // function returning a promise

      promises.push(testAsync(i));

    }

    $scope.numbers = $q.all(promises);

  };

  // Actual async call function as 

  // it has timout

  function testAsync (index) {

    var deferred = $q.defer();

    $timeout(function(){

      deferred.resolve(index);

    }, 1000)

    return deferred.promise;

  }

}

​

​