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        1208  0.3  0.4 1306792 68740 ?       Ssl   2025 1231:44 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11821108 102412 ?     Ssl   2025 1945:35 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1303048 70384 ?       Ssl   2025 1248:06 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1300464 66180 ?       Ssl   2025 1229:25 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.2  2.8 12225600 461944 ?     Ssl   2025 15524:11 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  6.0  3.5 12247472 583888 ?     Ssl   2025 21857:40 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      990007  0.3  0.5 22298648 97200 ?      Ssl  Jul01   5:46 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1116148  0.0  0.0   2608   596 ?        S    09:13   0:00 sh -c ps -aux | grep node
www-data 1116150  0.0  0.0   3304   648 ?        S    09:13   0:00 grep node
sasa     1214480  0.3  0.7 22311168 125596 ?     Ssl   2025 995:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101568 65280 ?       Ssl   2025 899:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101572 66940 ?       Ssl   2025 898:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101800 66504 ?       Ssl   2025 905:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1101316 65644 ?       Ssl   2025 900:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.3 1100416 65364 ?       Ssl   2025 897:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166440 65516 ?       Ssl   2025 888:40 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100896 65404 ?       Ssl   2025 884:55 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11844188 123308 ?     Ssl   2025 1839:28 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101560 66068 ?       Ssl   2025 897:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.6 11817820 112840 ?     Ssl  Apr20 863:33 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.5 1303676 82764 ?       Ssl  May31 200:17 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.8 11879492 146668 ?     Ssl  Apr25 596:35 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176796 132556 ?      Ssl   2025 2786:10 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11826264 102548 ?     Ssl   2025 2103:41 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799488 84640 ?      Ssl   2025 1744:16 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332680 86488 ?       Ssl  Feb21 1325:08 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js