Test JS script file

Selected file: 23var_null_obj.js
Compare console.log() outputs in browser and NodeJS.
Notice: Open browser's console in FireBUG!

  1. 01var_identifier.js
  2. 03var_data_types.js
  3. 03var_data_types_novar.js
  4. 04var_primitiveToObject.js
  5. 05var_string_object.js
  6. 06var_converting_data_types.js
  7. 10var_local_global_outside_function.js
  8. 12var_local_global_inside_function.js
  9. 13var_local_global_inside_function2.js
  10. 14var_local_global_return.js
  11. 16var_global_browser.js
  12. 16var_global_node.js
  13. 20var_Infinity.js
  14. 21var_NaN.js
  15. 22var_undefined.js
  16. 22var_undefined2.js
  17. 23var_empty_string.js
  18. 23var_null_obj.js

..:: Source code - 23var_null_obj.js ::..

/**
 * defininig null object
 */

x = 23;
x = null; //redefine variable x to null object
var type=typeof x;

console.log(type +': '+ x); //object: null


if(x==null) console.log('x is null'); //works
else if(x=='') console.log('x is empty string'); //dont work
 

..:: NodeJS Console - 23var_null_obj.js ::..

$ node 23var_null_obj.js 
object: null
x is null

$ps -aux | grep node (list all node processes)
sasa        1194  0.5  0.5 1304528 85692 ?       Ssl   2025 747:54 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305256 74196 ?       Ssl   2025 543:10 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11827252 117348 ?     Ssl   2025 1227:34 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11817896 102428 ?     Ssl   2025 858:50 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1331116 84476 ?       Ssl   2025 1181:16 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1305688 74068 ?       Ssl   2025 552:18 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1299400 68344 ?       Ssl   2025 542:24 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  2.7 12155104 458120 ?     Ssl   2025 6269:23 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  2.9  1.4 11936488 243016 ?     Ssl   2025 4132:45 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      492181  0.3  0.3 1100380 65052 ?       Ssl  03:02   1:23 node /home/sasa/dex8/dex8-worker/starter.js
www-data  519814  0.0  0.0   2608   592 ?        S    09:42   0:00 sh -c ps -aux | grep node
www-data  519816  0.0  0.0   3304   712 ?        S    09:42   0:00 grep node
sasa     1214480  0.3  0.3 1099656 64264 ?       Ssl   2025 165:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1099776 64232 ?       Ssl   2025 166:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1100036 64584 ?       Ssl   2025 165:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100264 64336 ?       Ssl   2025 166:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1099524 63664 ?       Ssl   2025 165:55 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.3 1099904 65060 ?       Ssl   2025 165:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1099880 63772 ?       Ssl   2025 163:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 63604 ?       Ssl   2025 162:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.5  0.7 11704608 118368 ?     Ssl   2025 275:19 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1099768 64084 ?       Ssl   2025 164:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2628167  0.9  0.8 1178556 132064 ?      Ssl   2025 1163:26 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11826628 103016 ?     Ssl   2025 827:16 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84208 ?      Ssl   2025 640:12 node /home/sasa/@mikosoft/dodo-examples/server/index.js