Promise each

promise-each.js

'use strict';

const Promise = require('bluebird');


let _updateResults = () => {
  let promises = [];

  for (let offset = 0; offset < 10; offset += 1) {
    promises.push(new Promise(resolve => _updateResultsInChunk(offset).then(resolve)));
  }
  return Promise.each(promises, () => {
    console.log('Done');
  });
};

let _updateResultsInChunk = (offset) => {
  console.log('Before Resolve ::' + offset);
  return new Promise(resolve => {
    console.log('1. Resolve ::' + offset);
    resolve(offset);
  }).then(() => new Promise(resolve => {
    console.log('2. Resolve ::' + offset);
    resolve(offset);
  }));
};

_updateResults().then(() => {
  process.exit(0);
}).catch((err) => {
  process.exit(1);
});