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 1304976 83404 ?       Ssl   2025 942:54 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304744 72284 ?       Ssl   2025 675:10 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11824792 115220 ?     Ssl   2025 1499:09 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11820400 107848 ?     Ssl   2025 1067:59 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1305176 72728 ?       Ssl   2025 685:47 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298092 68232 ?       Ssl   2025 674:00 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.9 12171332 480264 ?     Ssl   2025 8332:22 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.1  1.6 11955288 266872 ?     Ssl   2025 5684:06 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.4  0.7 22311424 126092 ?     Ssl   2025 373:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101824 66388 ?       Ssl   2025 306:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100804 65796 ?       Ssl   2025 306:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1100776 66064 ?       Ssl   2025 308:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100804 64612 ?       Ssl   2025 306:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100672 65920 ?       Ssl   2025 306:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1099880 64356 ?       Ssl   2025 301:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1099872 62696 ?       Ssl   2025 300:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11709832 124228 ?     Ssl   2025 682:45 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100792 64884 ?       Ssl   2025 305:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2509059  0.6  0.5 11802496 93436 ?      Ssl  Feb14 122:27 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176920 131948 ?      Ssl   2025 1491:50 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11801552 89828 ?      Ssl   2025 1059:57 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84168 ?      Ssl   2025 852:25 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1330464 83388 ?       Ssl  Feb21  58:45 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa     3941234  0.3  0.4 1102684 67676 ?       Ssl  03:02   1:52 node /home/sasa/dex8/dex8-worker/starter.js
www-data 3986619  0.0  0.0   2608   592 ?        S    12:39   0:00 sh -c ps -aux | grep node
www-data 3986621  0.0  0.0   3304   644 ?        S    12:39   0:00 grep node