..:: 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         890  0.5  0.5 11797276 84244 ?      Ssl   2024 1531:13 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         903  0.7  0.5 1331320 84196 ?       Ssl   2024 2170:42 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         929  0.3  0.4 1302328 70804 ?       Ssl   2024 1024:15 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         943  0.3  0.4 1303368 69172 ?       Ssl   2024 1002:36 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         980  0.5  0.6 11824164 99700 ?      Ssl   2024 1647:17 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa         981  0.5  0.6 1153712 108872 ?      Ssl   2024 1701:42 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1039  0.8  1.8 12081696 301048 ?     Ssl   2024 2506:31 node /home/sasa/voovuu/voovuu-pub/server/index.js
www-data 1226612  0.0  0.0   2608   596 ?        S    16:14   0:00 sh -c ps -aux | grep node
www-data 1226614  0.0  0.0   3304   724 ?        S    16:14   0:00 grep node
sasa     1788108  0.4  0.5 11806900 87632 ?      Ssl  Mar16 233:38 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1790865  0.7  0.5 11801788 94452 ?      Ssl  Jan30 867:19 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1791369  0.7  0.8 11789608 139552 ?     Ssl  Jan30 869:04 node /home/sasa/dex8/dex8-api/starter.js
sasa     2044488  0.3  0.4 1300372 69876 ?       Ssl   2024 871:02 node /home/sasa/dex8/dex8-panel/server/index.js
sasa     2574087  0.3  0.4 11795224 79400 ?      Ssl   2024 955:18 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3598766  0.3  0.4 1100892 66108 ?       Ssl   2024 588:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598767  0.3  0.4 22280560 81608 ?      Ssl   2024 598:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598774  0.3  0.4 1101408 67240 ?       Ssl   2024 590:40 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598775  0.3  0.4 1101152 66332 ?       Ssl   2024 592:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598802  0.6  1.0 22350028 178552 ?     Ssl   2024 1082:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598803  0.3  0.3 1100896 65456 ?       Ssl   2024 588:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598851  0.3  0.4 1102180 67368 ?       Ssl   2024 589:05 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598853  0.3  0.4 1101412 66948 ?       Ssl   2024 588:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598925  0.3  0.5 1329408 82156 ?       Ssl   2024 613:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3598927  0.3  0.4 1297676 66140 ?       Ssl   2024 589:43 node /home/sasa/dex8/dex8-worker/starter.js