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         849  0.5  0.5 1316608 84880 ?       Ssl  Oct08 282:31 node /home/sasa/regoch/regoch-www/server
sasa         880  0.4  0.5 1319240 87684 ?       Ssl  Oct08 235:17 node /home/sasa/dex8/dex8-www/server/index.js
sasa         890  0.5  0.5 11797800 85508 ?      Ssl  Oct08 333:48 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         903  0.7  0.4 1329652 81308 ?       Ssl  Oct08 430:08 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         929  0.4  0.4 1300184 68792 ?       Ssl  Oct08 225:50 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         943  0.4  0.4 1300808 66392 ?       Ssl  Oct08 232:57 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         980  0.6  0.5 11805104 91752 ?      Ssl  Oct08 363:59 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa         981  0.7  0.6 1148036 104144 ?      Ssl  Oct08 394:21 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1039  0.9  1.4 11941380 241308 ?     Ssl  Oct08 554:24 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa     2044488  0.3  0.4 1298112 66372 ?       Ssl  Nov01  76:56 node /home/sasa/dex8/dex8-panel/server/index.js
sasa     2574087  0.3  0.4 11792920 76832 ?      Ssl  Nov08  41:29 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     2702010  0.4  0.6 22296952 100316 ?     Ssl  Nov10  34:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702011  0.3  0.4 1100276 66672 ?       Ssl  Nov10  30:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702018  0.3  0.3 1099884 64960 ?       Ssl  Nov10  30:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702019  0.3  0.4 1100516 66308 ?       Ssl  Nov10  30:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702046  0.9  0.7 22301680 115708 ?     Ssl  Nov10  82:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702047  0.3  0.3 1099492 64776 ?       Ssl  Nov10  31:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702088  0.3  0.4 1100008 65900 ?       Ssl  Nov10  30:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702089  0.3  0.4 1099752 65776 ?       Ssl  Nov10  30:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702137  0.3  0.4 1099864 67112 ?       Ssl  Nov10  30:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702139  0.4  0.6 22297452 101740 ?     Ssl  Nov10  35:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3097623  1.2  0.8 11716736 131876 ?     Ssl  Nov13  43:08 node /home/sasa/dex8/dex8-api/starter.js
www-data 3354509  0.0  0.0   2608   604 ?        S    06:23   0:00 sh -c ps -aux | grep node
www-data 3354511  0.0  0.0   3304   728 ?        S    06:23   0:00 grep node