..:: Source code - 50bluebird_basic.js ::..

/**
 * basic usage of bluebird
 */

var Promise = require("bluebird");

//defining an async function
var cl = function () {
  setTimeout(function () {
    console.log('Write something');
  }, 2500);
};

//promisifing a function (attaching then() method)
var clAsync = Promise.promisifyAll(cl);

console.log(JSON.stringify(clAsync, null, 2));

//executing promisified function clAsync() and adding new callback with then method
clAsync()
  .then(function () {
    console.log('Write again');
  })
  .catch(function (e) {
    console.error(e.stack);
  });

..:: NodeJS Console - 50bluebird_basic.js ::..

$ps -aux | grep node (list all node processes)
sasa        1197  1.6  0.6 1329580 106796 ?      Ssl  Oct18  63:32 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211  9.6  0.6 11700480 105088 ?     Ssl  Oct18 366:40 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11798700 82432 ?      Ssl  Oct18  16:27 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.6  0.6 11821320 104996 ?     Ssl  Oct18  26:25 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.3  0.5 11797152 84432 ?      Ssl  Oct18  14:13 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1331372 85400 ?       Ssl  Oct18  23:36 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1299564 66612 ?       Ssl  Oct18  12:10 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1297416 64328 ?       Ssl  Oct18  11:58 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11845772 121464 ?     Ssl  Oct18  16:10 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.6 1154260 109060 ?      Ssl  Oct18  25:07 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  2.9  2.5 12108464 409996 ?     Ssl  Oct18 112:30 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11796288 79868 ?      Ssl  Oct18  12:42 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099360 63492 ?       Ssl  Oct18  12:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.3 1100136 64360 ?       Ssl  Oct18  12:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1099492 63940 ?       Ssl  Oct18  12:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1099620 63784 ?       Ssl  Oct18  12:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1099616 64620 ?       Ssl  Oct18  12:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1099104 64020 ?       Ssl  Oct18  12:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1098992 63464 ?       Ssl  Oct18  12:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099616 64416 ?       Ssl  Oct18  12:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099360 64120 ?       Ssl  Oct18  12:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099360 63824 ?       Ssl  Oct18  12:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11737124 88888 ?      Ssl  Oct18  16:41 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data  310534  0.0  0.0   2608   596 ?        S    04:57   0:00 sh -c ps -aux | grep node
www-data  310536  0.0  0.0   3304   720 ?        S    04:57   0:00 grep node