..:: 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 ::..

$ node 057wrapper_object.js
undefined
$ps -aux | grep node (list all node processes)
sasa        1208  0.3  0.4 1307304 71960 ?       Ssl   2025 1126:05 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11821272 106032 ?     Ssl   2025 1779:16 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304328 71856 ?       Ssl   2025 1141:37 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1300268 66520 ?       Ssl   2025 1124:32 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.3  2.7 12164476 452696 ?     Ssl   2025 14266:14 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.3  3.5 12236280 574344 ?     Ssl   2025 17636:58 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125184 ?     Ssl   2025 878:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101568 65732 ?       Ssl   2025 788:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101316 65864 ?       Ssl   2025 786:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101032 66048 ?       Ssl   2025 792:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1101060 65440 ?       Ssl   2025 788:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1102464 67312 ?       Ssl   2025 785:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166184 65276 ?       Ssl   2025 776:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100640 64900 ?       Ssl   2025 773:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11844700 125104 ?     Ssl   2025 1654:05 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101560 65832 ?       Ssl   2025 785:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.7 11832668 122544 ?     Ssl  Apr20 569:44 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.4 1302312 78580 ?       Ssl  May31  53:26 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.8 11879840 144620 ?     Ssl  Apr25 386:06 node /home/sasa/miko/miko-hr/server/index.js
sasa     2488146  0.3  0.5 22291588 96988 ?      Ssl  Jun07   7:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2628167  0.8  0.7 1169372 124316 ?      Ssl   2025 2550:05 node /home/sasa/voovuu/voovuu-api/starter.js
www-data 2672452  0.0  0.0   2608   592 ?        S    17:56   0:00 sh -c ps -aux | grep node
www-data 2672454  0.0  0.0   3304   660 ?        S    17:56   0:00 grep node
sasa     3168557  0.6  0.6 11814968 102652 ?     Ssl   2025 1890:48 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84264 ?      Ssl   2025 1574:30 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332680 86812 ?       Ssl  Feb21 1089:12 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js