..:: Source code - 053undefined_var.js ::..

/**
 * undefined cases
 */

//non initialized variable
var x;
console.log(x); //undefined


//function without parameter
function fja(y) { return y; }
console.log(fja());


//non existent property
var obj = {prop1: 'Some string'};
console.log(obj.prop2);

..:: NodeJS Console - 053undefined_var.js ::..

undefined
undefined
undefined

$ps -aux | grep node (list all node processes)
sasa        1197  1.3  0.6 1325708 98424 ?       Ssl  Oct18 307:49 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211  8.6  0.7 11710212 116380 ?     Ssl  Oct18 1922:07 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11801072 84176 ?      Ssl  Oct18  98:13 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.5 11806284 96212 ?      Ssl  Oct18 171:04 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11806908 89712 ?      Ssl  Oct18 100:56 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1339320 84556 ?       Ssl  Oct18 142:39 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1300692 68200 ?       Ssl  Oct18  69:27 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1298272 64504 ?       Ssl  Oct18  68:15 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.8 11861728 139100 ?     Ssl  Oct18 100:01 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.7 1163528 116284 ?      Ssl  Oct18 151:48 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.7  3.8 12337292 638780 ?     Ssl  Oct18 822:48 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797452 80712 ?      Ssl  Oct18  74:39 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099616 62436 ?       Ssl  Oct18  69:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.4 22278316 76944 ?      Ssl  Oct18  70:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1100004 63900 ?       Ssl  Oct18  69:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1099620 63924 ?       Ssl  Oct18  69:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1099616 63552 ?       Ssl  Oct18  69:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1099872 64184 ?       Ssl  Oct18  69:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1099760 63152 ?       Ssl  Oct18  69:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099360 63204 ?       Ssl  Oct18  69:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099616 63528 ?       Ssl  Oct18  69:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099616 63484 ?       Ssl  Oct18  69:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11803772 91116 ?      Ssl  Oct18 106:33 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.6  0.5 1331052 84624 ?       Ssl  Oct21 111:40 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.2  1.0 11872840 173232 ?     Ssl  Oct21 216:47 node /home/sasa/miko/miko-hr/server/index.js
www-data 1703150  0.0  0.0   2608   532 ?        S    22:41   0:00 sh -c ps -aux | grep node
www-data 1703152  0.0  0.0   3304   648 ?        S    22:41   0:00 grep node