How do I make this async foreach loop work with promises?

Question

I\'ve already messed around with Promises in it, but I\'m new to them and I just can\'t figure out how to do it properly. At the moment, there\'s no point to the Promise, be

Answer 1

I know this is an old question but things have changed a bit recently.

If you're fine with using external libraries, the Bluebird promise library has a pretty good implementation for this: Promise.each.

E.g.

function helperFunc(zippyarray) {
  return Promise.each(zippyarray, zippy => {
    return someOperationThatReturnAPromise(zippy)
      .then((singleResult) => {
        // do something with the operation result if needed
      })
  }).then((originalArray) => {
    // this happens only after the whole array is processed
    // (result is the original array here)
    return Promise.resolve(originalArray)
  })
}