..:: 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        1194  0.5  0.4 1304292 80640 ?       Ssl  Oct24  70:42 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.8  0.8 11719400 133812 ?     Ssl  Oct24 122:46 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.3  0.4 1302560 70912 ?       Ssl  Oct24  54:00 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.3  0.4 1304144 71556 ?       Ssl  Oct24  51:01 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.6 11824668 110904 ?     Ssl  Oct24 115:52 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.5 11811340 94692 ?      Ssl  Oct24  72:43 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.7  0.5 1329104 81932 ?       Ssl  Oct24  97:17 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1300548 67968 ?       Ssl  Oct24  51:53 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.3 1296524 64340 ?       Ssl  Oct24  50:45 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1292  0.5  0.5 11817156 90872 ?      Ssl  Oct24  76:24 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1363  2.5  2.0 12101528 336112 ?     Ssl  Oct24 353:01 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1441  0.3  0.4 11793928 76984 ?      Ssl  Oct24  55:00 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1449  0.3  0.4 1168872 67956 ?       Ssl  Oct24  53:20 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.4  1.0 22352108 164324 ?     Ssl  Oct24 205:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.3  0.4 1102180 66344 ?       Ssl  Oct24  53:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.3  0.4 1102180 65880 ?       Ssl  Oct24  53:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.4 1102180 66604 ?       Ssl  Oct24  53:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.3  0.4 1102184 67136 ?       Ssl  Oct24  53:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.3  0.4 1102180 67136 ?       Ssl  Oct24  53:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.3  0.4 1102176 66472 ?       Ssl  Oct24  53:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.3 1100128 64224 ?       Ssl  Oct24  52:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.3 1099112 63964 ?       Ssl  Oct24  52:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.0  0.7 11820128 119224 ?     Ssl  Oct24 140:11 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1969266  1.0  0.6 1145188 100536 ?      Ssl  Nov01  22:52 node /home/sasa/voovuu/voovuu-api/starter.js
www-data 2119506  0.0  0.0   2608   528 ?        S    03:35   0:00 sh -c ps -aux | grep node
www-data 2119508  0.0  0.0   3304   708 ?        S    03:35   0:00 grep node