seqauncer

gistfile1.txt

/*
 * serial executes Promises sequentially.
 * @param {funcs} An array of funcs that return promises.
 * @example
 * const urls = ['/url1', '/url2', '/url3']
 * serial(urls.map(url => () => $.ajax(url)))
 *     .then(console.log.bind(console))
 */
export const sequence = funcs => funcs.reduce((acc, b) => acc.then((f => x => f().then((list => Array.prototype.concat.bind(list))(x)))(b)), Promise.resolve([]))