Ember RSVP spread method

rsvp-extension.js

(function (RSVP) {

    if (!RSVP) {
        return;
    }

    /**
      Spread is utilized with the all() method.

      Basic Usage:
      ------------

      ```js
      new Ember.RSVP.all([findUser(), findSettings()]).spread(function (user, setting) {
        // have access to both user and settings, but as parameters rather than an array
      }, function(reason){
        // one of the promises is unavailable, and you are given the reason why
      });
      ```
      @method spread
      @param {Function} onFulfilled
      @param {Function} onRejected
      @param {String} label optional string for labeling the promise.
      Useful for tooling.
      @return {Promise}
     */
    RSVP.Promise.prototype.spread = function (onFulfillment, onRejection, label) {
        return this.then(function (array) {
            return onFulfillment.apply(void 0, array);
        }, onRejection, label);
    };


})(Ember.RSVP);