Test JS script file

Selected file: 053undefined_var.js
Compare console.log() outputs in browser and NodeJS.
Notice: Open browser's console in FireBUG!

  1. 001syntax_unicode.js
  2. 010number_DecToHex.js
  3. 011number_HexToDec.js
  4. 012number_toExponential.js
  5. 013number_modulo.js
  6. 014number_division_by_zero.js
  7. 015number_NaN.js
  8. 016number_infinity.js
  9. 017number_isFinite.js
  10. 018number_isNaN.js
  11. 019number_negative_zero.js
  12. 020number_float_rounding_error.js
  13. 030string_htmlTags.js
  14. 030string_multiline.js
  15. 031string_length.js
  16. 032string_concatenate.js
  17. 032string_concatenate2.js
  18. 033string_minus.js
  19. 035stringmethods_charAt.js
  20. 035stringmethods_concate.js
  21. 035stringmethods_indexOf.js
  22. 035stringmethods_match.js
  23. 035stringmethods_match_memory.js
  24. 035stringmethods_replace.js
  25. 035stringmethods_search.js
  26. 035stringmethods_split.js
  27. 035stringmethods_toString.js
  28. 035stringmethods_toUpperCase.js
  29. 035stringmethods_trim.js
  30. 036string_regexTest.js
  31. 040bool_falsy.js
  32. 040bool_truthy.js
  33. 041bool_comparison.js
  34. 042bool_conditional_operator.js
  35. 043bool_logic_operators.js
  36. 044bool_not_exe_function.js
  37. 050null_typeof.js
  38. 051null_comparison.js
  39. 053undefined_var.js
  40. 054ReferenceError.js
  41. 055global_object_browser.js
  42. 055global_object_node.js
  43. 056global_properties_browser.js
  44. 056global_properties_node.js
  45. 057wrapper_object.js
  46. 058wrapper_object_readonly.js
  47. 60object_reference.js

..:: Source code - 053undefined_var.js ::..

/**
 * undefined cases
 */

//non initialized variable
var x;
console.log(x); //undefined


//function without parameter
function fja(y) { return y; }
console.log(fja());


//non existent property
var obj = {prop1: 'Some string'};
console.log(obj.prop2);
 

..:: NodeJS Console - 053undefined_var.js ::..

$ node 053undefined_var.js 
undefined
undefined
undefined

$ps -aux | grep node (list all node processes)
sasa        1194  0.5  0.4 1304004 81680 ?       Ssl  Oct24 467:29 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  1.0  0.8 11723376 139764 ?     Ssl  Oct24 843:47 node /home/sasa/dex8/dex8-api/starter.js
sasa        1208  0.4  0.4 1305000 73056 ?       Ssl  Oct24 337:09 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  1.0  0.7 11825056 115200 ?     Ssl  Oct24 799:34 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11813644 99644 ?      Ssl  Oct24 530:50 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.9  0.5 1330860 85400 ?       Ssl  Oct24 718:31 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.4  0.4 1304408 72292 ?       Ssl  Oct24 342:53 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.4  0.4 1297772 66428 ?       Ssl  Oct24 336:57 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  3.9  3.4 12245160 559280 ?     Ssl  Oct24 3133:08 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1449  0.4  0.4 1233640 66312 ?       Ssl  Oct24 354:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.4  0.3 1100900 65288 ?       Ssl  Oct24 353:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.4  0.3 1100900 65112 ?       Ssl  Oct24 354:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.4  0.3 1100900 64868 ?       Ssl  Oct24 353:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.4  0.4 1101928 66456 ?       Ssl  Oct24 353:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.4  0.3 1101412 65408 ?       Ssl  Oct24 352:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.4  0.4 1168224 66852 ?       Ssl  Oct24 353:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.4  0.3 1100128 63476 ?       Ssl  Oct24 345:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.4  0.3 1099880 63804 ?       Ssl  Oct24 347:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  2.4  1.0 11872100 175408 ?     Ssl  Oct24 1949:26 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      122276  0.3  0.4 1102432 67004 ?       Ssl  04:14   2:04 node /home/sasa/dex8/dex8-worker/starter.js
www-data  160027  0.0  0.0   2608   532 ?        S    13:27   0:00 sh -c ps -aux | grep node
www-data  160029  0.0  0.0   3304   648 ?        S    13:27   0:00 grep node
sasa     2628167  1.0  0.8 1177828 131488 ?      Ssl  Nov04 647:53 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.7  0.5 11801336 91164 ?      Ssl  Nov06 470:06 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 83368 ?      Ssl  Nov06 320:11 node /home/sasa/@mikosoft/dodo-examples/server/index.js