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 1304948 83052 ?       Ssl   2025 861:07 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304744 73284 ?       Ssl   2025 614:42 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11838744 119348 ?     Ssl   2025 1373:08 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11818604 107072 ?     Ssl   2025 972:09 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1331116 85292 ?       Ssl   2025 1338:03 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1304920 73264 ?       Ssl   2025 624:39 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298576 68312 ?       Ssl   2025 613:45 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  2.7 12143996 451136 ?     Ssl   2025 7260:42 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.0  1.5 11950844 262048 ?     Ssl   2025 4945:36 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.4  0.7 22311424 126100 ?     Ssl   2025 306:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101056 65004 ?       Ssl   2025 242:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100548 65904 ?       Ssl   2025 241:45 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100776 65176 ?       Ssl   2025 243:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100292 64244 ?       Ssl   2025 242:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66512 ?       Ssl   2025 241:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100136 64492 ?       Ssl   2025 238:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100640 64540 ?       Ssl   2025 237:20 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.8  0.7 11708552 122676 ?     Ssl   2025 576:00 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100280 65120 ?       Ssl   2025 241:04 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2450573  0.3  0.4 1099352 65536 ?       Ssl  Feb14   4:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2509059  0.7  0.5 11816384 90068 ?      Ssl  Feb14   3:53 node /home/sasa/miko/miko-hr/server/index.js
www-data 2548774  0.0  0.0   2608   588 ?        S    02:12   0:00 sh -c ps -aux | grep node
www-data 2548776  0.0  0.0   3304   716 ?        S    02:12   0:00 grep node
sasa     2628167  0.9  0.8 1175364 131236 ?      Ssl   2025 1335:44 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11800928 89208 ?      Ssl   2025 952:42 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84432 ?      Ssl   2025 755:05 node /home/sasa/@mikosoft/dodo-examples/server/index.js