..:: 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  1.6  0.6 1327964 102580 ?      Ssl  Oct18 217:03 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211 10.6  0.6 11708472 113888 ?     Ssl  Oct18 1411:11 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11800816 85004 ?      Ssl  Oct18  58:10 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.6 11821352 106008 ?     Ssl  Oct18 100:16 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11803932 90228 ?      Ssl  Oct18  57:53 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1333432 84928 ?       Ssl  Oct18  84:28 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.3 1296340 63616 ?       Ssl  Oct18  41:35 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1298080 64720 ?       Ssl  Oct18  40:44 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11848816 126112 ?     Ssl  Oct18  58:42 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.6 1162980 113980 ?      Ssl  Oct18  85:38 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  2.8  2.6 12125768 428964 ?     Ssl  Oct18 382:07 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797056 80824 ?      Ssl  Oct18  43:52 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099104 63744 ?       Ssl  Oct18  41:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.4 22278316 78788 ?      Ssl  Oct18  41:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1099492 64204 ?       Ssl  Oct18  41:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1099364 63656 ?       Ssl  Oct18  41:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1099360 64352 ?       Ssl  Oct18  41:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1099104 63912 ?       Ssl  Oct18  41:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1099504 63508 ?       Ssl  Oct18  41:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099360 63412 ?       Ssl  Oct18  41:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099104 64004 ?       Ssl  Oct18  41:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099360 63320 ?       Ssl  Oct18  41:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11804536 93268 ?      Ssl  Oct18  59:36 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.5  0.5 1330148 83920 ?       Ssl  Oct21  51:44 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.1  1.2 11908520 211212 ?     Ssl  Oct21  97:18 node /home/sasa/miko/miko-hr/server/index.js
www-data 1056729  0.0  0.0   2608   524 ?        S    18:09   0:00 sh -c ps -aux | grep node
www-data 1056731  0.0  0.0   3304   716 ?        S    18:09   0:00 grep node