..:: 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  0.5 1303844 83020 ?       Ssl  Oct24 261:12 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.9  0.8 11722608 138676 ?     Ssl  Oct24 458:35 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.4  0.4 1302092 70444 ?       Ssl  Oct24 213:44 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.3  0.4 1304912 73264 ?       Ssl  Oct24 187:04 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.9  0.6 11826888 104452 ?     Ssl  Oct24 452:43 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.5 11810060 96664 ?      Ssl  Oct24 286:14 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.7  0.5 1330860 83848 ?       Ssl  Oct24 381:54 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1300548 68804 ?       Ssl  Oct24 190:06 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297724 67284 ?       Ssl  Oct24 187:29 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  3.2  3.0 12196564 507144 ?     Ssl  Oct24 1587:28 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1449  0.3  0.3 1166824 65248 ?       Ssl  Oct24 196:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.7  2.8 33152488 462316 ?     Ssl  Oct24 874:20 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.3  0.4 1103204 66540 ?       Ssl  Oct24 196:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.3  0.3 1100644 64024 ?       Ssl  Oct24 196:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.3 1100644 65016 ?       Ssl  Oct24 195:53 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.3  0.4 1101160 65544 ?       Ssl  Oct24 195:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.3  0.3 1101156 65148 ?       Ssl  Oct24 195:45 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.3  0.4 1167456 65940 ?       Ssl  Oct24 195:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.4 1102688 66132 ?       Ssl  Oct24 191:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.4 1101928 66012 ?       Ssl  Oct24 193:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.6  0.9 11855092 156364 ?     Ssl  Oct24 814:23 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     2628167  0.8  0.7 1169112 124832 ?      Ssl  Nov04 283:27 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11823260 99280 ?      Rsl  Nov06 200:08 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.4  0.5 11798408 83672 ?      Ssl  Nov06 130:37 node /home/sasa/@mikosoft/dodo-examples/server/index.js
www-data 3367503  0.0  0.0   2608   528 ?        S    23:58   0:00 sh -c ps -aux | grep node
www-data 3367505  0.0  0.0   3304   644 ?        S    23:58   0:00 grep node