..:: 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  0.5  0.4 1303832 78212 ?       Ssl  Jun15 191:00 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         843  0.5  0.7 11707920 120508 ?     Ssl  Jun15 201:49 node /home/sasa/dex8/dex8-api/starter.js
sasa         858  0.3  0.4 1306304 74340 ?       Ssl  Jun15 148:17 node /home/sasa/regoch/regoch-www/server
sasa         867  0.3  0.4 1300936 70508 ?       Ssl  Jun15 137:35 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         886  0.7  0.6 11819164 105652 ?     Ssl  Jun15 295:36 node /home/sasa/dex8/dex8-www/server/index.js
sasa         888  0.5  0.4 11794124 79992 ?      Ssl  Jun15 203:45 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         904  0.7  0.4 1329652 81796 ?       Ssl  Jun15 273:25 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         910  0.3  0.4 1300240 69256 ?       Ssl  Jun15 138:24 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         969  0.3  0.4 1298376 66488 ?       Ssl  Jun15 136:57 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         970  0.6  0.5 11810000 92236 ?      Ssl  Jun15 248:52 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1010  0.6  0.6 1148612 103552 ?      Ssl  Jun15 231:57 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1016  0.7  1.1 11895732 190540 ?     Ssl  Jun15 296:38 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1086  0.3  0.4 11794656 77816 ?      Ssl  Jun15 149:35 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1089  0.3  0.3 1099868 64180 ?       Ssl  Jun15 140:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1159  0.3  0.4 22277948 78204 ?      Rsl  Jun15 143:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1160  0.3  0.3 1099100 62032 ?       Ssl  Jun15 140:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1241  0.3  0.3 1101208 63304 ?       Ssl  Jun15 141:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1242  0.4  0.7 22305596 115548 ?     Ssl  Jun15 153:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1323  0.3  0.3 1099612 63640 ?       Ssl  Jun15 140:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1324  0.3  0.3 1100128 64068 ?       Ssl  Jun15 140:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1398  0.3  0.3 1099104 63028 ?       Ssl  Jun15 140:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1400  0.3  0.3 1100380 63068 ?       Ssl  Jun15 140:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1465  0.3  0.3 1100128 64008 ?       Ssl  Jun15 140:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa      178968  0.8  0.6 11812052 99772 ?      Ssl  Jun17 282:51 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1802958  0.7  0.5 1316016 91072 ?       Ssl  Jul09  14:52 node /home/sasa/crypto/dex-arbitrage-bot/scripts/observer/index-
www-data 1931975  0.0  0.0   2608   596 ?        S    03:12   0:00 sh -c ps -aux | grep node
www-data 1931977  0.0  0.0   3304   656 ?        S    03:12   0:00 grep node