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 1305796 84612 ?       Ssl   2025 1176:56 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73192 ?       Ssl   2025 846:22 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.7  0.5 11805608 95968 ?      Ssl   2025 1887:29 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11819024 106340 ?     Ssl   2025 1339:19 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73024 ?       Ssl   2025 859:13 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298028 68236 ?       Ssl   2025 844:52 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.9 12164520 475576 ?     Ssl   2025 10819:34 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.5  2.3 12063752 390452 ?     Ssl   2025 8494:16 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125816 ?     Ssl   2025 565:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101056 65084 ?       Ssl   2025 490:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101316 66180 ?       Ssl   2025 488:56 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101032 65880 ?       Ssl   2025 492:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100804 64484 ?       Ssl   2025 489:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1102720 67460 ?       Ssl   2025 488:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100648 64344 ?       Ssl   2025 481:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100384 64360 ?       Ssl   2025 479:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11715512 123640 ?     Ssl   2025 985:14 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1103352 66792 ?       Ssl   2025 488:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2509059  0.5  0.6 11805976 99584 ?      Ssl  Feb14 436:59 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176408 132232 ?      Ssl   2025 1906:08 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11821200 95928 ?      Ssl   2025 1368:09 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 85232 ?      Ssl   2025 1127:31 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1331932 85788 ?       Ssl  Feb21 431:41 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa     4093325  0.3  0.4 1102432 66168 ?       Ssl  04:02   1:43 node /home/sasa/dex8/dex8-worker/starter.js
www-data 4134542  0.0  0.0   2608   596 ?        S    13:00   0:00 sh -c ps -aux | grep node
www-data 4134544  0.0  0.0   3304   720 ?        S    13:00   0:00 grep node