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 1305484 83848 ?       Ssl   2025 937:07 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304744 72304 ?       Ssl   2025 670:55 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.6 11829912 110688 ?     Ssl   2025 1489:15 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11818352 105028 ?     Ssl   2025 1061:16 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1306968 72924 ?       Ssl   2025 681:29 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298092 68484 ?       Ssl   2025 669:45 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  3.2 12219956 530796 ?     Ssl   2025 8234:05 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.1  1.6 11955288 265872 ?     Ssl   2025 5631:42 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.4  0.7 22311424 126068 ?     Ssl   2025 368:56 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1100800 64676 ?       Ssl   2025 302:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1100804 65328 ?       Ssl   2025 301:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100776 65108 ?       Ssl   2025 303:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100548 64604 ?       Ssl   2025 302:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66428 ?       Ssl   2025 301:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100392 63944 ?       Ssl   2025 297:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1099360 63184 ?       Ssl   2025 296:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11708296 123252 ?     Ssl   2025 675:10 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100792 65008 ?       Ssl   2025 300:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2509059  0.6  0.6 11830264 108620 ?     Ssl  Feb14 114:16 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1178712 132220 ?      Ssl   2025 1479:54 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11801808 91456 ?      Ssl   2025 1052:03 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84552 ?      Ssl   2025 845:31 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1330464 83492 ?       Ssl  Feb21  50:27 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa     3832236  0.3  0.3 1098588 62620 ?       Ssl  03:03   2:14 node /home/sasa/dex8/dex8-worker/starter.js
www-data 3882347  0.0  0.0   2608   596 ?        S    14:04   0:00 sh -c ps -aux | grep node
www-data 3882349  0.0  0.0   3304   720 ?        S    14:04   0:00 grep node