..:: 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 1304488 72100 ?       Ssl   2025 1095:15 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11823576 108248 ?     Ssl   2025 1730:54 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304584 71148 ?       Ssl   2025 1110:37 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 66964 ?       Ssl   2025 1093:42 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  2.8 12157252 461544 ?     Ssl   2025 13967:41 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.1  3.4 12230300 568792 ?     Ssl   2025 16363:55 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125436 ?     Ssl   2025 844:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101568 65280 ?       Ssl   2025 755:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1102852 67344 ?       Ssl   2025 753:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101800 66452 ?       Ssl   2025 759:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1101572 65672 ?       Ssl   2025 755:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66124 ?       Ssl   2025 753:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.4 1167208 65820 ?       Ssl   2025 743:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100384 64772 ?       Ssl   2025 740:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11844444 124940 ?     Ssl   2025 1599:51 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101816 65536 ?       Ssl   2025 752:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.7 11820576 116396 ?     Ssl  Apr20 495:48 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.4 1301248 73152 ?       Ssl  May31  10:29 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1798619  0.3  0.3 1098844 63972 ?       Ssl  04:02   2:28 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1874976  0.0  0.0   2608   600 ?        S    16:52   0:00 sh -c ps -aux | grep node
www-data 1874978  0.0  0.0   3304   716 ?        S    16:52   0:00 grep node
sasa     1904154  0.6  0.6 11829888 107324 ?     Ssl  Apr25 323:20 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176152 131396 ?      Ssl   2025 2483:26 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11837496 112668 ?     Ssl   2025 1832:58 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 83964 ?      Ssl   2025 1524:57 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332680 87212 ?       Ssl  Feb21 1018:25 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js