Function all

lib/test/angular/1.6.7/angular.js:17385–17405

* @ngdoc method * @name $q#all * @kind function * * @description * Combines multiple promises into a single promise that is resolved when all of the input * promises are resolved. * * @param {Array. |Object. } promises An array or hash of promises. * @retur

(promises)

   */

  function all(promises) {
    var result = new Promise(),
        counter = 0,
        results = isArray(promises) ? [] : {};

    forEach(promises, function(promise, key) {
      counter++;
      when(promise).then(function(value) {
        results[key] = value;
        if (!(--counter)) resolvePromise(result, results);
      }, function(reason) {
        rejectPromise(result, reason);
      });
    });

    if (counter === 0) {
      resolvePromise(result, results);
    }

    return result;
  }

  /**
   * @ngdoc method