async-promises.js

'use strict';

var Promise = require('bluebird')
  , express = require('express');

var app = express();

function getUsers () {
  return new Promise(function (resolve, reject) {
    resolve(['jane', 'john']);
  });
}

function getAges () {
  return new Promise(function (resolve, reject) {
    resolve(['23', '43']);
  });
}

function getData () {
  return Promise.props({
    users: getUsers(),
    ages: getAges()
  });
}

app.get('/', function (req, res, next) {

  getData()
    .then(function (data) {
      res.json(data);
    })
    .catch(next);
});

app.listen(3001, function (err) {
  if (err) {
    throw err;
  }

  console.log('listening on 3001');
});