..:: 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 71968 ?       Ssl   2025 1157:05 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11821776 106304 ?     Ssl   2025 1827:56 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1308236 74164 ?       Ssl   2025 1173:12 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 67508 ?       Ssl   2025 1155:24 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.3  2.8 12163696 465444 ?     Ssl   2025 14663:16 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.6  3.5 12247728 587904 ?     Ssl   2025 18940:36 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125764 ?     Ssl   2025 913:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1102848 67248 ?       Ssl   2025 821:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100804 65564 ?       Ssl   2025 819:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1101288 65372 ?       Ssl   2025 825:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1102340 65808 ?       Ssl   2025 821:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66508 ?       Ssl   2025 818:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166440 65156 ?       Ssl   2025 809:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 64948 ?       Ssl   2025 806:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11844188 124312 ?     Ssl   2025 1708:37 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1101304 64944 ?       Ssl   2025 818:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.6 11806300 108692 ?     Ssl  Apr20 673:43 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.4 1302368 78984 ?       Ssl  May31  96:34 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.9 11886660 151128 ?     Ssl  Apr25 456:07 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.7 1176284 129904 ?      Ssl   2025 2619:51 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11813944 104680 ?     Ssl   2025 1950:04 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84032 ?      Ssl   2025 1624:17 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1333192 86516 ?       Ssl  Feb21 1160:09 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa     3389722  0.3  0.3 1099356 64356 ?       Ssl  04:02   2:53 node /home/sasa/dex8/dex8-worker/starter.js
www-data 3454454  0.0  0.0   2608   524 ?        S    19:08   0:00 sh -c ps -aux | grep node
www-data 3454456  0.0  0.0   3304   648 ?        S    19:08   0:00 grep node