parallelPromises.js

const promises = ['some promises in here'];

const waitForPromises = asyncRunner(function* (promises) {
    for (const promise of promises) {
      yield promise;
    }
    
    // At this point all the promises have resolved.
});

// vs

const waitForPromises = asyncRunner(function* (promises) {
  yield Promise.all(promises);
  
  // At this point all promises have resolved.
});

// Bonus... async-await just progressed to stage 3, so one day (or now with babel) you'll be able to do this:

const waitForPromises = async function (promises) {
  for (const promise of promises) {
    await promise;
  }
};

// or

const waitForPromises = async function (promises) {
  await Promise.all(promises);
};

// but that's obviously redundant.