..:: 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 1304744 72724 ?       Ssl   2025 1188:41 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11820884 103924 ?     Ssl   2025 1877:57 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1308168 68244 ?       Ssl   2025 1205:06 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298172 67092 ?       Ssl   2025 1186:49 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.3  2.9 12259136 486880 ?     Ssl   2025 15098:57 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.8  3.5 12249264 585748 ?     Ssl   2025 20200:21 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data   27012  0.0  0.0   2608   588 ?        S    21:05   0:00 sh -c ps -aux | grep node
www-data   27014  0.0  0.0   3304   716 ?        S    21:05   0:00 grep node
sasa     1214480  0.3  0.7 22311168 125244 ?     Ssl   2025 948:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101568 66400 ?       Ssl   2025 854:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101060 66284 ?       Ssl   2025 853:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1101032 65476 ?       Ssl   2025 859:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1101060 65136 ?       Ssl   2025 855:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100672 65796 ?       Ssl   2025 852:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166440 65140 ?       Ssl   2025 843:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100384 65308 ?       Ssl   2025 839:45 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11844444 125364 ?     Ssl   2025 1764:12 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1101816 65308 ?       Ssl   2025 852:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.8 11833356 131708 ?     Ssl  Apr20 748:43 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.4 1303148 79616 ?       Ssl  May31 140:36 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.8 11859780 143180 ?     Ssl  Apr25 512:27 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1178332 131564 ?      Ssl   2025 2691:57 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11815384 104952 ?     Ssl   2025 2013:35 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799488 84264 ?      Ssl   2025 1675:13 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332424 87052 ?       Ssl  Feb21 1231:10 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa     4033471  0.3  0.5 22293716 97724 ?      Ssl  Jun21   8:13 node /home/sasa/dex8/dex8-worker/starter.js