runPromisesSync.js

/**
 * runPromisesSync :: (array, function) -> Promise
 * 
 * Runs a list of functions that return a Promise one by one
 * promisesFactoryMap - a list of functions that return a promise
 */
const runPromisesSync = (promisesFactoryMap, onError = defaultOnError) =>
  promisesFactoryMap.reduce(
    (prevPromise, nextPromise) => prevPromise.then(nextPromise).catch(onError),
    Promise.resolve()
  );