Test JS script file

Selected file: 019number_negative_zero.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 - 019number_negative_zero.js ::..

/**
 * UNDERFLOW
 * Negative zero occurs when the number is less then ±5 × 10−324
 */

var y = -2e-324;

console.log(typeof y); //number
console.log(y); //-0 in browser, 0 in NodeJS
 

..:: NodeJS Console - 019number_negative_zero.js ::..

$ node 019number_negative_zero.js 
number
-0

$ps -aux | grep node (list all node processes)
sasa        1194  0.4  0.5 1305352 83812 ?       Ssl   2025 1514:01 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1303976 70464 ?       Ssl   2025 1078:14 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11818192 105844 ?     Ssl   2025 1704:22 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304328 72032 ?       Ssl   2025 1093:32 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298428 67988 ?       Ssl   2025 1076:51 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  2.7 12151008 442676 ?     Ssl   2025 13845:29 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.0  3.4 12229184 568608 ?     Ssl   2025 15676:15 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125624 ?     Ssl   2025 825:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101568 66144 ?       Ssl   2025 737:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1102852 68048 ?       Ssl   2025 735:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101288 65592 ?       Ssl   2025 741:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1101572 65444 ?       Ssl   2025 737:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66060 ?       Ssl   2025 735:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.4 1167976 66924 ?       Ssl   2025 725:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100384 65068 ?       Ssl   2025 722:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11843932 124836 ?     Ssl   2025 1569:55 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1101816 65480 ?       Ssl   2025 734:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1281586  0.3  0.4 1101408 65740 ?       Ssl  04:03   3:25 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1362877  0.0  0.0   2608   596 ?        S    21:48   0:00 sh -c ps -aux | grep node
www-data 1362879  0.0  0.0   3304   716 ?        S    21:48   0:00 grep node
sasa     1399960  0.8  0.7 11827064 115176 ?     Ssl  Apr20 453:39 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1904154  0.5  0.6 11806972 99004 ?      Ssl  Apr25 288:12 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1177176 133412 ?      Ssl   2025 2448:20 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11803448 92940 ?      Ssl   2025 1800:36 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84464 ?      Ssl   2025 1497:51 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332680 86940 ?       Ssl  Feb21 979:30 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js