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  0.4  0.5 1306452 87328 ?       Ssl   2025 1295:48 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304744 73016 ?       Ssl   2025 933:07 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11819604 107072 ?     Ssl   2025 1475:41 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73544 ?       Ssl   2025 946:46 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 68772 ?       Ssl   2025 931:41 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.7 12148960 458644 ?     Ssl   2025 12085:59 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  4.0  2.7 12116824 451364 ?     Ssl   2025 10717:15 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125844 ?     Ssl   2025 663:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1102848 67000 ?       Ssl   2025 582:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100804 65748 ?       Ssl   2025 581:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101288 65796 ?       Ssl   2025 585:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100292 64584 ?       Ssl   2025 582:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66004 ?       Ssl   2025 581:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100904 64964 ?       Ssl   2025 572:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100384 64456 ?       Ssl   2025 570:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11711292 123760 ?     Ssl   2025 1137:59 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100536 65280 ?       Ssl   2025 580:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.7  0.5 11805724 94988 ?      Ssl  Apr20  64:33 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1904154  0.5  0.5 11805656 93752 ?      Ssl  Apr25   9:02 node /home/sasa/miko/miko-hr/server/index.js
sasa     1979731  0.3  0.4 22280320 80316 ?      Ssl  04:03   2:36 node /home/sasa/dex8/dex8-worker/starter.js
www-data 2037166  0.0  0.0   2608   532 ?        S    16:52   0:00 sh -c ps -aux | grep node
www-data 2037168  0.0  0.0   3304   712 ?        S    16:52   0:00 grep node
sasa     2628167  0.8  0.8 1176664 131988 ?      Ssl   2025 2118:29 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11826184 101064 ?     Ssl   2025 1531:02 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84004 ?      Ssl   2025 1266:04 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1332748 86192 ?       Ssl  Feb21 642:29 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js