..:: Source code - 057wrapper_object.js ::..

/**
This code demonstrates that strings, numbers, and boolean
values behave like objects when you try to read the value of a property (or method)
from them. But if you attempt to set the value of a property, that attempt is silently
ignored: the change is made on a temporary object and does not persist.
The temporary objects created when you access a property of a string, number, or
boolean are known as wrapper objects, and it may occasionally be necessary to distin-
guish a string value from a String object or a number or boolean value from a Number
or Boolean object. 
 */

var s = "test"; //this is string

s.len = 4; //setting a property doesn't take effect

var t = s.len;
console.log(t); //returns undefined because s.len=4 doent work

..:: NodeJS Console - 057wrapper_object.js ::..

undefined

$ps -aux | grep node (list all node processes)
sasa        1194  0.5  0.4 1304724 81080 ?       Ssl  Oct24  68:17 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.8  0.8 11719400 135512 ?     Ssl  Oct24 119:12 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.3  0.4 1302560 70752 ?       Ssl  Oct24  52:08 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.3  0.4 1304144 71636 ?       Ssl  Oct24  49:16 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.6 11831324 110456 ?     Ssl  Oct24 112:34 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.5 11811340 94900 ?      Ssl  Oct24  70:02 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.6  0.5 1329104 82452 ?       Ssl  Oct24  93:53 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1300548 67836 ?       Ssl  Oct24  50:07 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.3 1296524 64948 ?       Ssl  Oct24  48:57 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1292  0.5  0.5 11821316 94368 ?      Ssl  Oct24  73:14 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1363  2.5  2.1 12104600 346304 ?     Ssl  Oct24 349:03 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1441  0.3  0.4 11793928 77140 ?      Ssl  Oct24  53:07 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1449  0.3  0.3 1165288 64396 ?       Ssl  Oct24  51:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.5  0.9 22333124 151796 ?     Ssl  Oct24 201:45 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.3  0.3 1099364 63888 ?       Ssl  Oct24  51:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.3  0.3 1098596 62280 ?       Ssl  Oct24  51:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.3 1099364 64144 ?       Ssl  Oct24  51:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.3  0.3 1099624 64960 ?       Ssl  Oct24  51:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.3  0.3 1099108 63568 ?       Ssl  Oct24  51:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.3  0.3 1100128 64792 ?       Ssl  Oct24  51:20 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.3 1099872 64508 ?       Ssl  Oct24  50:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.3 1099112 63780 ?       Ssl  Oct24  50:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.0  0.7 11820128 118772 ?     Ssl  Oct24 134:37 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1969266  1.0  0.6 1145056 99700 ?       Ssl  Nov01  19:44 node /home/sasa/voovuu/voovuu-api/starter.js
www-data 2087135  0.0  0.0   2608   600 ?        S    22:07   0:00 sh -c ps -aux | grep node
www-data 2087137  0.0  0.0   3304   656 ?        S    22:07   0:00 grep node