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         849  0.5  0.5 1317376 86148 ?       Ssl  Oct08 282:48 node /home/sasa/regoch/regoch-www/server
sasa         880  0.4  0.5 1319240 88056 ?       Ssl  Oct08 235:29 node /home/sasa/dex8/dex8-www/server/index.js
sasa         890  0.5  0.5 11797800 84868 ?      Ssl  Oct08 334:06 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         903  0.7  0.4 1329652 81528 ?       Ssl  Oct08 430:31 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         929  0.4  0.4 1300184 68392 ?       Ssl  Oct08 226:02 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         943  0.4  0.4 1300808 66368 ?       Ssl  Oct08 233:09 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         980  0.6  0.5 11805104 92548 ?      Ssl  Oct08 364:18 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa         981  0.7  0.6 1148036 104268 ?      Ssl  Oct08 394:40 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1039  0.9  1.4 11942148 241800 ?     Ssl  Oct08 554:43 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa     2044488  0.3  0.4 1298112 66756 ?       Ssl  Nov01  77:07 node /home/sasa/dex8/dex8-panel/server/index.js
sasa     2574087  0.3  0.4 11792920 77324 ?      Ssl  Nov08  41:42 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     2702010  0.4  0.6 22296952 100228 ?     Ssl  Nov10  34:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702011  0.3  0.4 1100276 66128 ?       Ssl  Nov10  31:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702018  0.3  0.3 1099884 64812 ?       Ssl  Nov10  31:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702019  0.3  0.4 1100516 67296 ?       Ssl  Nov10  31:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702046  0.9  0.7 22311780 124424 ?     Ssl  Nov10  84:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702047  0.3  0.3 1099492 65412 ?       Ssl  Nov10  31:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702088  0.3  0.4 1100008 66436 ?       Ssl  Nov10  31:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702089  0.3  0.4 1099752 65956 ?       Ssl  Nov10  30:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702137  0.3  0.4 1099864 65844 ?       Ssl  Nov10  30:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702139  0.4  0.6 22297196 101820 ?     Ssl  Nov10  35:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3097623  1.1  0.8 11718784 131576 ?     Ssl  Nov13  43:46 node /home/sasa/dex8/dex8-api/starter.js
www-data 3361584  0.0  0.0   2608   608 ?        S    07:21   0:00 sh -c ps -aux | grep node
www-data 3361586  0.0  0.0   3304   732 ?        S    07:21   0:00 grep node