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 1305504 83256 ?       Ssl   2025 1502:10 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304744 71364 ?       Ssl   2025 1069:33 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11820324 105620 ?     Ssl   2025 1690:04 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304072 71472 ?       Ssl   2025 1084:47 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298428 67316 ?       Ssl   2025 1068:12 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  2.7 12155616 445772 ?     Ssl   2025 13792:54 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  4.9  3.4 12226880 567740 ?     Ssl   2025 15336:13 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1080177  0.3  0.4 22279280 78656 ?      Ssl  04:03   3:56 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1159904  0.0  0.0   2608   524 ?        S    23:32   0:00 sh -c ps -aux | grep node
www-data 1159906  0.0  0.0   3304   644 ?        S    23:32   0:00 grep node
sasa     1214480  0.3  0.7 22311168 125996 ?     Ssl   2025 815:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1102336 66128 ?       Ssl   2025 727:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101060 65952 ?       Ssl   2025 726:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1101288 65480 ?       Ssl   2025 731:53 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1101316 65672 ?       Ssl   2025 728:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100672 65552 ?       Ssl   2025 725:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166184 64872 ?       Ssl   2025 716:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 64248 ?       Ssl   2025 713:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11851612 125660 ?     Ssl   2025 1554:44 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1102072 66100 ?       Ssl   2025 725:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.6 11806812 109212 ?     Ssl  Apr20 434:29 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1904154  0.6  0.6 11830012 106744 ?     Ssl  Apr25 272:39 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176664 132452 ?      Ssl   2025 2431:16 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11825464 100080 ?     Ssl   2025 1784:24 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84368 ?      Ssl   2025 1484:04 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332680 86688 ?       Ssl  Feb21 959:36 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js