..:: 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         914  0.5  0.5 1307120 85020 ?       Ssl  Aug04 342:12 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         935  0.7  0.8 11786584 132104 ?     Ssl  Aug04 506:15 node /home/sasa/dex8/dex8-api/starter.js
sasa         938  0.4  0.4 1307036 76684 ?       Ssl  Aug04 290:49 node /home/sasa/regoch/regoch-www/server
sasa         945  0.3  0.4 1303752 71292 ?       Ssl  Aug04 247:30 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         947  0.7  0.6 11829336 108640 ?     Ssl  Aug04 504:16 node /home/sasa/dex8/dex8-www/server/index.js
sasa         966  0.5  0.6 11808976 98772 ?      Ssl  Aug04 381:41 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         980  0.8  0.5 1330216 83824 ?       Ssl  Aug04 524:21 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         997  0.3  0.4 1303104 70848 ?       Ssl  Aug04 250:15 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1021  0.3  0.3 1297448 64928 ?       Ssl  Aug04 246:34 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1065  0.6  0.7 11837660 115956 ?     Ssl  Aug04 420:33 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1074  0.6  0.6 1148752 103632 ?      Ssl  Aug04 410:15 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1136  0.7  0.9 11859364 153208 ?     Ssl  Aug04 476:15 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1148  0.4  0.4 11794644 78380 ?      Ssl  Aug04 273:19 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1197  0.3  0.3 1100652 64000 ?       Rsl  Aug04 255:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1199  0.4  0.4 22277756 76992 ?      Ssl  Aug04 259:04 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1308  0.3  0.3 1100128 64288 ?       Ssl  Aug04 254:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1325  0.3  0.3 1100128 64120 ?       Ssl  Aug04 254:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1393  0.8  0.9 22330616 148524 ?     Ssl  Aug04 521:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1395  0.3  0.3 1100140 63972 ?       Ssl  Aug04 255:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1489  0.3  0.3 1099872 63712 ?       Ssl  Aug04 255:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1496  0.3  0.3 1100640 65288 ?       Ssl  Aug04 253:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.3 1100128 63892 ?       Ssl  Aug04 254:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1608  0.3  0.3 1100384 64296 ?       Ssl  Aug04 253:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1686  1.4  5.0 12559996 825768 ?     Ssl  Aug04 916:51 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data  959851  0.0  0.0   2608   600 ?        S    11:26   0:00 sh -c ps -aux | grep node
www-data  959853  0.0  0.0   3304   716 ?        S    11:26   0:00 grep node
sasa     1371685  0.4  0.5 11797820 86276 ?      Ssl  Aug16 209:57 node /home/sasa/mikosoft-info/solar-wind-energy/server/index.js
sasa     1460918  0.4  0.3 1300136 64768 ?       Ssl  Aug17 208:01 node /home/sasa/sites-nodejs/oxygen-free-copper/server.js