Promise waterfall

Promise waterfall.js

// objectsToProcess  - array of objects to process
// asyncFunction - asynct function that take objectsToProcess item as argument and return a promise

var promise = objectsToProcess.reduce((accumulator , item) => {
  return accumulator.then(asyncFunction(item));
  }, Promise.resolve());

promise
  .then(console.log)
  .catch(console.log);