Test JS script file

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

  1. 05define_functions.js
  2. 10module_basic1.js
  3. 10module_basic2.js
  4. 10module_basic3.js
  5. 11module_nesting.js
  6. file.js
  7. fs-async.js
  8. fs-async2.js
  9. fs-async3.js
  10. fs-sync.js
  11. fs-sync2.js
  12. http.js
  13. index.html
  14. index.js
  15. my_modules
  16. net.js
  17. npm-debug.log
  18. package.json
  19. promises
  20. socket.js
  21. sys.js
  22. testfiles

..:: Source code - fs-async.js ::..

/*
This example shows asynchronous execution, non-blocking code.
console.log(contents); blocks process and that's why
console.log('Do something else!'); must wait

Successfully loads files up to 1000MB.
 */

//load modules
var fs = require('fs');

//asynchronous file reading
fs.readFile('./testfiles/largefile1000mb.txt', function(err, content){
	console.log(content);
});

//here process is not blocked. While file is loading the next console.log(); continue with execution

console.log('Do something else!');

/*
Conclusion: Due to asynchronous execution, first appear 'Do something else' then is file dumped.
 */
 

..:: NodeJS Console - fs-async.js ::..

$ node fs-async.js 
Do something else!
undefined

$ps -aux | grep node (list all node processes)
sasa        1194  0.4  0.5 1305740 84496 ?       Ssl   2025 1258:14 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73872 ?       Ssl   2025 905:45 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.7  0.6 11829612 107028 ?     Ssl   2025 2041:58 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11815888 103552 ?     Ssl   2025 1432:58 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1303896 71828 ?       Ssl   2025 919:11 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 67156 ?       Ssl   2025 904:12 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.7 12142972 444068 ?     Ssl   2025 11750:23 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.8  2.7 12109984 443152 ?     Ssl   2025 9983:19 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      356539  0.5  0.6 11847012 105552 ?     Ssl  Apr11  74:19 node /home/sasa/miko/miko-hr/server/index.js
sasa     1214480  0.3  0.7 22311168 125972 ?     Ssl   2025 632:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101312 65180 ?       Ssl   2025 553:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1102340 67168 ?       Ssl   2025 552:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101032 66104 ?       Ssl   2025 556:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100548 64544 ?       Ssl   2025 553:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 65636 ?       Ssl   2025 551:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100648 64900 ?       Ssl   2025 543:53 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 63544 ?       Ssl   2025 541:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11709624 124848 ?     Ssl   2025 1089:51 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100792 65156 ?       Ssl   2025 551:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1332840  0.3  0.3 1098848 62896 ?       Ssl  04:04   2:09 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1380946  0.0  0.0   2608   536 ?        S    14:55   0:00 sh -c ps -aux | grep node
www-data 1380948  0.0  0.0   3304   648 ?        S    14:55   0:00 grep node
sasa     2628167  0.8  0.8 1178968 132312 ?      Ssl   2025 2054:23 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11821560 95044 ?      Ssl   2025 1478:57 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84916 ?      Ssl   2025 1222:22 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1332612 86336 ?       Ssl  Feb21 576:26 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js