angularjs $q decorator for spread

README.md

Use it like this

$q.all([ promise1, promise2 ]).then($q.spread(function (promise1Result, promise2Result) {

});

qDecorator.js

'use strict';

angular.module('common.decorators').config(function ($provide) {

  var resolveWith = function($q) {
    return function resolved(val) {
      var dfd = $q.defer();
      dfd.resolve(val);
      return dfd.promise;
    };
  };

  $provide.decorator('$q', function ($delegate) {
    if (angular.isUndefined($delegate.spread)) {
      // Let's add a `spread()` that is very useful
      // when using $q.all()

      $delegate.spread = function(targetFn, scope) {
        return function () {
          var params = [].concat(arguments[0]);
          targetFn.apply(scope, params);
        };
      };
    }

    if (angular.isUndefined($delegate.resolve)) {
      // Similar to $q.reject(), let's add $q.resolve()
      // to easily make an immediately-resolved promise
      // ... this is useful for mock promise-returning APIs.
      $delegate.resolve = resolveWith($delegate);
    }

    return $delegate;
  });
});

Thank you for your code,
Please add return statement before targetFn.apply(scope, params);
elsewhere next ".then" after .spread is not working