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        1208  0.3  0.3 1310368 49716 ?       Ssl   2025 1678:16 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.4 11827516 75028 ?      Ssl   2025 2650:04 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.2 1308568 47136 ?       Ssl   2025 1698:54 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.2 1301856 44164 ?       Ssl   2025 1672:55 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.2  3.5 12295892 575952 ?     Ssl   2025 21531:57 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  8.1  4.2 12371956 693864 ?     Ssl   2025 41068:23 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.5 22311168 92252 ?      Ssl   2025 1489:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.2 1101568 35472 ?       Ssl   2025 1372:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.2 1101316 34844 ?       Ssl   2025 1370:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.2 1102312 35552 ?       Ssl   2025 1382:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.2 1102340 35772 ?       Ssl   2025 1375:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.2 1102464 36804 ?       Ssl   2025 1370:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.2 1166184 34504 ?       Ssl   2025 1361:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.2 1100128 33532 ?       Ssl   2025 1355:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1216489  0.3  0.2 1101304 34392 ?       Ssl   2025 1371:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.5 11806556 87748 ?      Ssl  Apr20 2173:34 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.6  0.3 1303868 58140 ?       Ssl  May31 1201:37 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1824679  0.4  0.3 11799104 57852 ?      Ssl  Aug15 374:41 node /home/sasa/kriptus/kriptus-panel/server/index.js
sasa     2072475  0.7  0.5 1162844 94016 ?       Ssl  Sep24 174:22 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     2075109  9.8  0.6 11714400 98396 ?      Ssl  Sep24 2270:35 node /home/sasa/dex8/dex8-api/starter.js
sasa     2075416  0.6  0.3 1344952 59264 ?       Ssl  Sep24 151:22 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa     2448036  1.2  0.8 11866712 146504 ?     Ssl  Aug21 871:16 node /home/sasa/miko/miko-hr/server/index.js
sasa     2663246  2.2  0.6 11853248 108164 ?     Ssl  Aug23 1547:07 node /home/sasa/kriptus/kriptus-api/starter.js
sasa     3168557  0.6  0.5 11851988 89876 ?      Ssl   2025 3005:35 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.3 11799488 55008 ?      Ssl   2025 2463:23 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3615181  0.6  0.5 1330740 84180 ?       Ssl  Oct07  27:02 node /home/sasa/miko/miko-hr/api/starter.js
sasa     3809381  0.3  0.5 22301896 82352 ?      Ssl  Sep02 196:37 node /home/sasa/dex8/dex8-worker/starter.js
www-data 3944135  0.0  0.0   2608   596 ?        S    21:45   0:00 sh -c ps -aux | grep node
www-data 3944137  0.0  0.0   3304   704 ?        S    21:45   0:00 grep node