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 1304320 84616 ?       Ssl   2025 694:08 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305256 74524 ?       Ssl   2025 503:14 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11838664 121100 ?     Ssl   2025 1145:43 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11817500 106140 ?     Ssl   2025 794:49 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1331116 84560 ?       Ssl   2025 1092:43 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1304408 73380 ?       Ssl   2025 511:58 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298220 67564 ?       Ssl   2025 502:31 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  2.9 12180604 488996 ?     Ssl   2025 5708:49 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  2.8  1.2 11903792 208176 ?     Ssl   2025 3690:33 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.3 1099912 65332 ?       Ssl   2025 123:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1099776 64960 ?       Ssl   2025 123:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1100036 65184 ?       Ssl   2025 123:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100008 65176 ?       Ssl   2025 124:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1099524 65024 ?       Ssl   2025 123:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1099904 65952 ?       Ssl   2025 123:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1099368 64376 ?       Ssl   2025 121:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1099360 64064 ?       Ssl   2025 120:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.5  0.7 11704856 120064 ?     Ssl   2025 203:17 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1099768 64728 ?       Ssl   2025 122:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2628167  0.9  0.7 1174584 129872 ?      Ssl   2025 1068:02 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11803344 92484 ?      Ssl   2025 756:40 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84648 ?      Ssl   2025 575:44 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3722453  0.3  0.4 1102172 67376 ?       Ssl  03:03   3:50 node /home/sasa/dex8/dex8-worker/starter.js
www-data 3808010  0.0  0.0   2608   588 ?        S    21:56   0:00 sh -c ps -aux | grep node
www-data 3808012  0.0  0.0   3304   708 ?        S    21:56   0:00 grep node