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        1197  2.6  0.6 1329004 106316 ?      Ssl  Oct18  56:18 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211 16.8  0.6 11700992 104836 ?     Ssl  Oct18 359:51 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11798160 82140 ?      Ssl  Oct18   8:42 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.6  0.6 11826088 99368 ?      Ssl  Oct18  14:45 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.3  0.5 11797788 82416 ?      Ssl  Oct18   7:42 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.5  0.5 1329960 83584 ?       Ssl  Oct18  12:18 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.3 1298284 65044 ?       Ssl  Oct18   6:47 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1297128 63892 ?       Ssl  Oct18   6:38 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.6 11828592 103240 ?     Ssl  Oct18   8:38 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.6 1153436 108556 ?      Ssl  Oct18  14:34 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.4  2.5 12114508 419288 ?     Ssl  Oct18  73:26 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11796032 79548 ?      Ssl  Oct18   7:02 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099616 64604 ?       Ssl  Oct18   6:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.3 1099624 64104 ?       Ssl  Oct18   6:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1099748 64268 ?       Ssl  Oct18   6:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1099364 64144 ?       Ssl  Oct18   6:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1099616 64392 ?       Ssl  Oct18   6:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1099360 63708 ?       Ssl  Oct18   6:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1099504 63844 ?       Ssl  Oct18   6:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099360 64516 ?       Ssl  Oct18   6:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099360 64064 ?       Ssl  Oct18   6:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099104 64352 ?       Ssl  Oct18   6:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11744292 91468 ?      Ssl  Oct18   8:45 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data  181421  0.0  0.0   2608   532 ?        S    00:57   0:00 sh -c ps -aux | grep node
www-data  181423  0.0  0.0   3304   716 ?        S    00:57   0:00 grep node