..:: 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        1197  1.9  0.6 1329516 106776 ?      Ssl  Oct18  60:44 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211 11.4  0.6 11700480 105368 ?     Ssl  Oct18 364:01 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11798188 82156 ?      Ssl  Oct18  13:29 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.6  0.5 11814544 96020 ?      Ssl  Oct18  21:45 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.3  0.5 11798044 83840 ?      Ssl  Oct18  11:35 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1331372 85156 ?       Ssl  Oct18  19:16 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1302636 67704 ?       Ssl  Oct18  10:04 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1297416 64760 ?       Ssl  Oct18   9:54 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11844824 119352 ?     Ssl  Oct18  12:56 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.6 1152056 107800 ?      Ssl  Oct18  21:04 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.0  2.4 12107084 409416 ?     Ssl  Oct18  97:43 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11796032 80064 ?      Ssl  Oct18  10:30 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099104 64012 ?       Ssl  Oct18  10:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.3 1099880 64176 ?       Ssl  Oct18  10:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1099236 63028 ?       Ssl  Oct18  10:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1099364 63660 ?       Ssl  Oct18  10:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1099360 64108 ?       Ssl  Oct18  10:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1099104 64176 ?       Ssl  Oct18  10:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1099248 63780 ?       Ssl  Oct18  10:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099360 63280 ?       Ssl  Oct18  10:05 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099104 63656 ?       Ssl  Oct18  10:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099360 63832 ?       Ssl  Oct18  10:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11733540 85500 ?      Ssl  Oct18  13:37 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data  260397  0.0  0.0   2608   596 ?        S    18:08   0:00 sh -c ps -aux | grep node
www-data  260399  0.0  0.0   3304   716 ?        S    18:08   0:00 grep node