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  0.5  0.5 1304164 82016 ?       Ssl  Oct24 342:23 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.9  0.8 11730688 141804 ?     Ssl  Oct24 615:05 node /home/sasa/dex8/dex8-api/starter.js
sasa        1208  0.3  0.4 1303976 72288 ?       Ssl  Oct24 247:01 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.9  0.6 11845428 106428 ?     Ssl  Oct24 602:06 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11811340 98792 ?      Ssl  Oct24 382:57 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1330860 84176 ?       Ssl  Oct24 514:34 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1301012 70096 ?       Ssl  Oct24 250:38 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298204 66376 ?       Ssl  Oct24 246:54 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  3.2  2.7 12139276 445512 ?     Ssl  Oct24 2033:14 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1449  0.4  0.3 1232360 65112 ?       Ssl  Oct24 259:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.8  3.1 33208244 522308 ?     Rsl  Oct24 1184:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.4  0.3 1100644 64464 ?       Ssl  Oct24 258:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.4  0.3 1100644 64912 ?       Ssl  Oct24 258:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.4  0.3 1101412 65320 ?       Ssl  Oct24 257:55 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.4  0.4 1101672 66564 ?       Ssl  Oct24 258:04 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.4  0.3 1101668 65488 ?       Ssl  Oct24 257:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.4  0.4 1167968 66756 ?       Ssl  Oct24 258:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.4  0.3 1100128 64008 ?       Ssl  Oct24 252:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.4  0.4 1102952 66916 ?       Ssl  Oct24 254:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.9  0.9 11857744 160220 ?     Ssl  Oct24 1240:34 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data 1640097  3.0  0.0   2608   596 ?        S    08:51   0:00 sh -c ps -aux | grep node
www-data 1640099  1.0  0.0   3304   716 ?        S    08:51   0:00 grep node
sasa     2628167  0.8  0.7 1172852 128820 ?      Ssl  Nov04 416:42 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11801044 89792 ?      Ssl  Nov06 306:58 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.4  0.5 11798664 83204 ?      Ssl  Nov06 203:36 node /home/sasa/@mikosoft/dodo-examples/server/index.js