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  0.4 1304744 71812 ?       Ssl   2025 1150:03 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11821008 106252 ?     Ssl   2025 1816:56 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304840 71032 ?       Ssl   2025 1165:43 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 68792 ?       Ssl   2025 1148:22 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.3  2.9 12185056 488956 ?     Ssl   2025 14577:21 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.5  3.5 12242260 584068 ?     Ssl   2025 18642:21 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 126056 ?     Ssl   2025 905:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101312 65632 ?       Ssl   2025 813:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101316 65996 ?       Rsl   2025 811:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101800 66048 ?       Ssl   2025 818:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1101316 64912 ?       Ssl   2025 814:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1102208 66660 ?       Ssl   2025 811:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166440 64852 ?       Ssl   2025 802:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.4 1102432 67340 ?       Ssl   2025 798:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11844188 124724 ?     Ssl   2025 1696:17 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101304 65632 ?       Ssl   2025 811:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.7 11832096 120248 ?     Ssl  Apr20 657:44 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.4 1301888 77908 ?       Ssl  May31  86:48 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.7 11835824 130016 ?     Ssl  Apr25 436:08 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176540 132108 ?      Ssl   2025 2605:32 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3161820  0.3  0.5 22298844 96032 ?      Ssl  Jun13   4:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3168557  0.6  0.6 11814456 103064 ?     Ssl   2025 1937:17 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 85140 ?      Ssl   2025 1613:01 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1333192 87616 ?       Ssl  Feb21 1144:05 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
www-data 3273596  0.0  0.0   2608   600 ?        S    04:38   0:00 sh -c ps -aux | grep node
www-data 3273598  0.0  0.0   3304   724 ?        S    04:38   0:00 grep node