Function all

tools/ngui/static/js/lib/angular.js:7013–7034

* @ngdoc * @name ng.$q#all * @methodOf ng.$q * @description * Combines multiple promises into a single promise that is resolved when all of the input * promises are resolved. * * @param {Array. } promises An array of promises. * @returns {Promise} Returns a single pro

(promises)

   *   same rejection.
   */
  function all(promises) {
    var deferred = defer(),
        counter = promises.length,
        results = [];

    if (counter) {
      forEach(promises, function(promise, index) {
        ref(promise).then(function(value) {
          if (index in results) return;
          results[index] = value;
          if (!(--counter)) deferred.resolve(results);
        }, function(reason) {
          if (index in results) return;
          deferred.reject(reason);
        });
      });
    } else {
      deferred.resolve(results);
    }

    return deferred.promise;
  }

  return {
    defer: defer,