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!

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  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
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  15. 031string_length.js
  16. 032string_concatenate.js
  17. 032string_concatenate2.js
  18. 033string_minus.js
  19. 035stringmethods_charAt.js
  20. 035stringmethods_concate.js
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  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 1306252 85196 ?       Ssl   2025 1215:13 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73564 ?       Ssl   2025 874:24 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.7  0.5 11805768 97240 ?      Ssl   2025 1969:14 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11819536 107764 ?     Ssl   2025 1383:29 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73204 ?       Ssl   2025 887:29 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 67316 ?       Ssl   2025 872:49 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.6  2.7 12142972 450496 ?     Ssl   2025 11342:10 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.7  2.5 12090160 419888 ?     Ssl   2025 9162:00 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      356539  0.4  0.5 11820352 92860 ?      Ssl  Apr11  15:56 node /home/sasa/miko/miko-hr/server/index.js
sasa      569674  0.3  0.3 1098848 64304 ?       Ssl  04:03   2:43 node /home/sasa/dex8/dex8-worker/starter.js
www-data  633685  0.0  0.0   2608   596 ?        S    17:52   0:00 sh -c ps -aux | grep node
www-data  633687  0.0  0.0   3304   720 ?        S    17:52   0:00 grep node
sasa     1214480  0.3  0.7 22311168 126048 ?     Ssl   2025 597:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101568 65252 ?       Ssl   2025 520:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100804 65524 ?       Ssl   2025 518:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101288 66280 ?       Ssl   2025 522:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1101060 64632 ?       Ssl   2025 519:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1101184 65572 ?       Ssl   2025 518:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100648 64400 ?       Ssl   2025 511:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.4 1102944 67148 ?       Ssl   2025 509:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11709880 123836 ?     Ssl   2025 1034:41 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1101304 64716 ?       Ssl   2025 518:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2628167  0.8  0.8 1177176 132756 ?      Ssl   2025 1979:40 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11800976 90412 ?      Ssl   2025 1420:34 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 85000 ?      Ssl   2025 1172:22 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1332072 85832 ?       Ssl  Feb21 500:03 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js