File: promise/js/batch.js

            /**
            Returns a new promise that will be resolved when all operations have completed.
            Takes both any numer of values as arguments. If an argument is a not a promise,
            it will be wrapped in a new promise, same as in `Y.when()`.
            
            @for YUI
            @method batch
            @param {Any} operation* Any number of Y.Promise objects or regular JS values
            @return {Promise} Promise to be fulfilled when all provided promises are
                                resolved
            **/
            Y.batch = function () {
                return Promise.all(slice.call(arguments));
            };