..:: 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  1.3  0.5 1326332 97036 ?       Ssl  Oct18 313:24 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211  8.2  0.7 11841532 115084 ?     Ssl  Oct18 1928:49 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11801072 84068 ?      Ssl  Oct18 104:01 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.6 11817232 100672 ?     Ssl  Oct18 180:34 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11807164 91340 ?      Ssl  Oct18 107:14 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1331640 83724 ?       Ssl  Oct18 151:09 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1302164 66868 ?       Ssl  Oct18  73:32 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1298272 65156 ?       Ssl  Oct18  72:17 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11864288 124456 ?     Ssl  Oct18 105:50 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.7 1165972 116528 ?      Ssl  Oct18 159:40 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.6  3.8 12363816 634792 ?     Ssl  Oct18 850:12 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797452 81180 ?      Ssl  Oct18  79:17 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099872 63200 ?       Ssl  Oct18  73:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.4 22278316 77324 ?      Ssl  Oct18  74:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1100260 64120 ?       Ssl  Oct18  73:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1100132 64064 ?       Ssl  Oct18  73:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1100128 64144 ?       Ssl  Oct18  73:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1100128 64408 ?       Ssl  Oct18  73:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1100272 64060 ?       Ssl  Oct18  73:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099872 63580 ?       Ssl  Oct18  73:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099872 63676 ?       Ssl  Oct18  73:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099872 63328 ?       Ssl  Oct18  73:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11805052 91988 ?      Ssl  Oct18 114:55 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.6  0.5 1331308 84716 ?       Ssl  Oct21 120:27 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.2  1.0 11907656 177968 ?     Ssl  Oct21 230:01 node /home/sasa/miko/miko-hr/server/index.js
www-data 1792335  0.0  0.0   2608   596 ?        S    20:02   0:00 sh -c ps -aux | grep node
www-data 1792337  0.0  0.0   3304   712 ?        S    20:02   0:00 grep node