..:: 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        1194  0.5  0.5 1304644 83036 ?       Ssl   2025 1061:09 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73116 ?       Ssl   2025 761:47 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11828764 119524 ?     Ssl   2025 1682:19 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11823672 107432 ?     Ssl   2025 1205:06 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73884 ?       Ssl   2025 773:18 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1301872 71392 ?       Ssl   2025 760:22 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  3.0 12192068 502636 ?     Ssl   2025 9399:20 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.2  2.0 12007608 329512 ?     Ssl   2025 6883:25 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.4  0.7 22311424 126220 ?     Ssl   2025 470:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1100800 64528 ?       Ssl   2025 399:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100548 66096 ?       Ssl   2025 398:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100776 64944 ?       Ssl   2025 401:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1102340 66152 ?       Ssl   2025 399:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66060 ?       Ssl   2025 398:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100136 64012 ?       Ssl   2025 392:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 63756 ?       Ssl   2025 390:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11708808 124944 ?     Ssl   2025 835:30 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1100792 65692 ?       Ssl   2025 397:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1953746  0.3  0.4 1101916 66992 ?       Ssl  03:03   1:39 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1991210  0.0  0.0   2608   588 ?        S    11:28   0:00 sh -c ps -aux | grep node
www-data 1991212  0.0  0.0   3304   648 ?        S    11:28   0:00 grep node
sasa     2509059  0.5  0.6 11825120 102640 ?     Ssl  Feb14 280:52 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1179736 133740 ?      Ssl   2025 1693:07 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11822992 97624 ?      Ssl   2025 1212:22 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 85508 ?      Ssl   2025 991:34 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1330104 82552 ?       Ssl  Feb21 236:32 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js