..:: 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         831  0.4  0.4 1300928 72184 ?       Ssl  Jun15   7:37 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         843  0.4  0.6 11696264 100836 ?     Ssl  Jun15   6:59 node /home/sasa/dex8/dex8-api/starter.js
sasa         858  0.3  0.3 1032464 60500 ?       Ssl  Jun15   5:34 node /home/sasa/regoch/regoch-www/server
sasa         867  0.3  0.3 1292724 59324 ?       Ssl  Jun15   5:26 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         886  0.7  0.5 11796468 83912 ?      Ssl  Jun15  12:19 node /home/sasa/dex8/dex8-www/server/index.js
sasa         888  0.3  0.4 11789848 74204 ?      Ssl  Jun15   5:52 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         904  0.6  0.4 1329612 81216 ?       Ssl  Jun15   9:57 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         910  0.3  0.3 1295860 63340 ?       Ssl  Jun15   5:27 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         969  0.3  0.3 1028148 55084 ?       Ssl  Jun15   5:22 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         970  0.4  0.6 11817212 98760 ?      Ssl  Jun15   7:31 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1010  0.4  0.5 1138968 92664 ?       Ssl  Jun15   6:58 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1016  0.6  0.6 11809128 105664 ?     Ssl  Jun15   9:44 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1086  0.3  0.4 11595744 75704 ?      Ssl  Jun15   5:46 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1089  0.3  0.3 1099612 65264 ?       Ssl  Jun15   5:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1159  0.3  0.3 1099616 64440 ?       Ssl  Jun15   5:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1160  0.3  0.3 1099612 63884 ?       Ssl  Jun15   5:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1241  0.3  0.3 1100952 63140 ?       Ssl  Jun15   5:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1242  0.3  0.4 22277820 77640 ?      Ssl  Jun15   5:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1323  0.3  0.3 1099612 64296 ?       Ssl  Jun15   5:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1324  0.3  0.3 1099616 63696 ?       Ssl  Jun15   5:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1398  0.3  0.3 1099616 63784 ?       Ssl  Jun15   5:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1400  0.3  0.3 1099356 64176 ?       Ssl  Jun15   5:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1465  0.3  0.3 1099616 63968 ?       Ssl  Jun15   5:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1475  0.3  0.6 11809828 105372 ?     Ssl  Jun15   6:11 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data   78108  0.0  0.0   2608   536 ?        S    05:20   0:00 sh -c ps -aux | grep node
www-data   78110  0.0  0.0   3304   720 ?        S    05:20   0:00 grep node