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         831  0.4  0.4 1300504 71536 ?       Ssl  Jun15   6:50 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         843  0.4  0.6 11696264 101264 ?     Ssl  Jun15   6:14 node /home/sasa/dex8/dex8-api/starter.js
sasa         858  0.3  0.3 1032208 60104 ?       Ssl  Jun15   4:58 node /home/sasa/regoch/regoch-www/server
sasa         867  0.3  0.3 1292724 59252 ?       Ssl  Jun15   4:52 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         886  0.7  0.5 11813560 96136 ?      Ssl  Jun15  10:56 node /home/sasa/dex8/dex8-www/server/index.js
sasa         888  0.3  0.4 11789848 74456 ?      Ssl  Jun15   5:15 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         904  0.6  0.4 1329612 81908 ?       Ssl  Jun15   8:54 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         910  0.3  0.3 1296900 64696 ?       Ssl  Jun15   4:51 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         969  0.3  0.3 1027636 55444 ?       Ssl  Jun15   4:48 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         970  0.4  0.5 11824892 98140 ?      Ssl  Jun15   6:42 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1010  0.4  0.5 1138712 92012 ?       Ssl  Jun15   6:11 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1016  0.6  0.6 11816504 108848 ?     Ssl  Jun15   8:41 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1086  0.3  0.4 11595744 74916 ?      Ssl  Jun15   5:10 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1089  0.3  0.3 1099356 64560 ?       Ssl  Jun15   5:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1159  0.3  0.3 1099360 64316 ?       Ssl  Jun15   5:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1160  0.3  0.3 1099356 63864 ?       Ssl  Jun15   5:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1241  0.3  0.3 1100696 62568 ?       Ssl  Jun15   4:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1242  0.3  0.4 22275868 74580 ?      Ssl  Jun15   5:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1323  0.3  0.3 1099356 63592 ?       Ssl  Jun15   5:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1324  0.3  0.3 1099360 63904 ?       Ssl  Jun15   4:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1398  0.3  0.3 1099360 64008 ?       Ssl  Jun15   4:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1400  0.3  0.3 1099356 63808 ?       Ssl  Jun15   5:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1465  0.3  0.3 1099360 64160 ?       Ssl  Jun15   4:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1475  0.4  0.7 11838336 120284 ?     Ssl  Jun15   5:32 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data   69420  0.0  0.0   2608   604 ?        S    02:29   0:00 sh -c ps -aux | grep node
www-data   69422  0.0  0.0   3304   728 ?        S    02:29   0:00 grep node