..:: 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 1303860 80440 ?       Ssl  Oct24  77:32 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.9  0.8 11719656 134412 ?     Ssl  Oct24 137:44 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.4  0.4 1303480 70792 ?       Ssl  Oct24  59:24 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.3  0.4 1304912 72196 ?       Ssl  Oct24  56:00 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.6 11827408 114260 ?     Ssl  Oct24 125:24 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.5 11811852 95452 ?      Ssl  Oct24  80:25 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.7  0.4 1329104 81072 ?       Ssl  Oct24 106:55 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1300292 67724 ?       Ssl  Oct24  56:48 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.3 1296732 64048 ?       Ssl  Oct24  55:48 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1292  0.5  0.5 11835424 93552 ?      Ssl  Oct24  85:13 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1363  2.5  2.3 12140792 392240 ?     Rsl  Oct24 374:48 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1441  0.4  0.4 11794184 77732 ?      Ssl  Oct24  60:20 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1449  0.3  0.3 1165288 63964 ?       Ssl  Oct24  58:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.7  2.3 22563040 382040 ?     Ssl  Oct24 264:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.3  0.3 1099364 63860 ?       Ssl  Oct24  58:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.3  0.3 1098340 62560 ?       Ssl  Oct24  58:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.3 1099364 63624 ?       Ssl  Oct24  58:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.3  0.3 1099624 64456 ?       Ssl  Oct24  58:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.3  0.3 1099108 63184 ?       Ssl  Oct24  58:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.3  0.3 1100384 64788 ?       Ssl  Oct24  58:20 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.3 1100128 64004 ?       Ssl  Oct24  57:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.3 1099112 64348 ?       Ssl  Oct24  57:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.0  0.7 11820640 119468 ?     Ssl  Oct24 156:40 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1969266  1.0  0.6 1146100 100636 ?      Ssl  Nov01  32:44 node /home/sasa/voovuu/voovuu-api/starter.js
www-data 2353696  0.0  0.0   2608   596 ?        S    19:09   0:00 sh -c ps -aux | grep node
www-data 2353698  0.0  0.0   3304   644 ?        S    19:09   0:00 grep node