stephantabor

var Promise = require('bluebird');

var funcs = Promise.resolve([500, 100, 400, 200].map((n) => makeWait(n)));

funcs
  .each(iterator)       // logs: 500, 100, 400, 200
  .then(console.log)    // logs: [ [Function], [Function], [Function], [Function] ]

funcs
  .mapSeries(iterator)  // logs: 500, 100, 400, 200