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  0.5  0.5 1304984 83516 ?       Ssl   2025 630:57 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73864 ?       Ssl   2025 457:29 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.9  0.7 11862204 126616 ?     Ssl   2025 1052:44 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11820060 104272 ?     Ssl   2025 722:02 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1331116 84364 ?       Ssl   2025 989:18 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.4  0.4 1303640 71964 ?       Ssl   2025 465:37 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297580 67536 ?       Ssl   2025 456:53 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.1  3.0 12185468 497060 ?     Ssl   2025 4826:42 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  2.7  1.2 11896020 201740 ?     Ssl   2025 3166:00 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.3 1099656 64448 ?       Ssl   2025  75:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1099776 65048 ?       Ssl   2025  75:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1099780 65364 ?       Ssl   2025  75:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100008 64960 ?       Ssl   2025  75:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1099524 64272 ?       Ssl   2025  75:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.3 1099648 65000 ?       Ssl   2025  74:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.4 1102696 66876 ?       Ssl   2025  73:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.4 1102688 66836 ?       Ssl   2025  73:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.5  0.7 11703940 118580 ?     Ssl   2025 121:33 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1099256 64104 ?       Ssl   2025  74:45 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2628167  0.9  0.8 1176224 132604 ?      Ssl   2025 943:52 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     2766216  0.3  0.3 1099488 64484 ?       Ssl  03:03   4:16 node /home/sasa/dex8/dex8-worker/starter.js
www-data 2857472  0.0  0.0   2608   532 ?        S    23:31   0:00 sh -c ps -aux | grep node
www-data 2857474  0.0  0.0   3304   712 ?        S    23:31   0:00 grep node
sasa     3168557  0.7  0.6 11823444 98744 ?      Ssl   2025 679:12 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84240 ?      Ssl   2025 502:58 node /home/sasa/@mikosoft/dodo-examples/server/index.js