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 1306396 85812 ?       Ssl   2025 1277:05 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304232 73256 ?       Ssl   2025 919:28 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11817936 107636 ?     Ssl   2025 1454:21 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304664 72996 ?       Ssl   2025 933:01 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298220 68644 ?       Ssl   2025 917:59 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  3.5 12268800 582824 ?     Ssl   2025 11918:39 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.9  2.7 12109216 442556 ?     Ssl   2025 10351:16 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      356539  0.5  0.5 11808100 95812 ?      Ssl  Apr11  99:48 node /home/sasa/miko/miko-hr/server/index.js
sasa     1214480  0.3  0.7 22311168 126104 ?     Ssl   2025 647:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101056 65288 ?       Ssl   2025 568:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101060 66060 ?       Ssl   2025 566:55 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1103080 67264 ?       Ssl   2025 570:53 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100548 64348 ?       Ssl   2025 568:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 65628 ?       Ssl   2025 566:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100648 64864 ?       Ssl   2025 558:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 63920 ?       Ssl   2025 556:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11709624 124836 ?     Ssl   2025 1113:58 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100536 64288 ?       Ssl   2025 566:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.7  0.6 11820740 104976 ?     Ssl  Apr20  30:04 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1546536  0.3  0.6 22294916 100544 ?     Ssl  Apr22   7:11 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1709696  0.0  0.0   2608   588 ?        S    15:47   0:00 sh -c ps -aux | grep node
www-data 1709698  0.0  0.0   3304   724 ?        S    15:47   0:00 grep node
sasa     2628167  0.8  0.8 1178200 132096 ?      Ssl   2025 2086:40 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11827080 101708 ?     Ssl   2025 1505:44 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 85208 ?      Ssl   2025 1244:20 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1332748 86660 ?       Ssl  Feb21 609:51 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js