..:: 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 1308384 74304 ?       Ssl   2025 1375:43 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11822252 99676 ?      Ssl   2025 2172:28 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1308260 74120 ?       Ssl   2025 1392:48 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1301520 68860 ?       Ssl   2025 1372:21 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.2  3.2 12283316 540172 ?     Ssl   2025 17268:53 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  6.7  3.6 12264900 598660 ?     Ssl   2025 27658:07 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      535839  0.3  0.3 1095260 60132 ?       Ssl  04:02   0:01 node /home/sasa/dex8/dex8-worker/starter.js
www-data  536511  0.0  0.0   2608   592 ?        S    04:10   0:00 sh -c ps -aux | grep node
www-data  536513  0.0  0.0   3304   720 ?        S    04:10   0:00 grep node
sasa     1214480  0.3  0.7 22311168 124312 ?     Ssl   2025 1155:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101824 65128 ?       Ssl   2025 1052:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101060 65912 ?       Ssl   2025 1050:55 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1102312 66184 ?       Ssl   2025 1059:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1102084 65496 ?       Ssl   2025 1053:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1102208 66968 ?       Ssl   2025 1050:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166440 64236 ?       Ssl   2025 1041:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1101920 65088 ?       Ssl   2025 1036:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.8  0.7 11847612 124860 ?     Ssl   2025 2688:59 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101560 65688 ?       Ssl   2025 1050:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.6 11817564 113792 ?     Ssl  Apr20 1307:01 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.6 1322544 102144 ?      Ssl  May31 465:36 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.8 11857012 144324 ?     Ssl  Apr25 974:11 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.7  0.8 1176796 132156 ?      Ssl   2025 3120:42 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11852304 112168 ?     Ssl   2025 2411:44 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799488 84216 ?      Ssl   2025 1975:27 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1333192 86856 ?       Rsl  Feb21 1644:15 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js