Bluebird Promise Sequential

bluebird-promise-sequential.js

/*
 * Sequential Promises
 * Adapt from https://github.com/petkaantonov/bluebird/issues/70#issuecomment-32256273
 */
function promiseSequential(tasks) {
	return Promise.reduce(tasks, function (values, task) {
		if (typeof task === 'function') {
			return task().then(function (value) {
				values.push(value);
				return values;
			});
		} else if (task instanceof Promise) {
			return task.then(function (value) {
				values.push(value);
				return values;
			});
		} else {
			values.push(task);
			return values;
		}
	}, []);
}