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 1305000 72560 ?       Ssl   2025 1203:51 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11820596 103804 ?     Ssl   2025 1902:14 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1303816 71016 ?       Ssl   2025 1220:24 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298316 66852 ?       Ssl   2025 1202:00 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.3  2.8 12238500 467256 ?     Ssl   2025 15216:02 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.8  3.5 12248752 585644 ?     Ssl   2025 20780:41 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      281302  0.3  0.5 22305964 94496 ?      Ssl  Jun25   5:14 node /home/sasa/dex8/dex8-worker/starter.js
www-data  411678  0.0  0.0   2608   528 ?        S    06:15   0:00 sh -c ps -aux | grep node
www-data  411680  0.0  0.0   3304   716 ?        S    06:15   0:00 grep node
sasa     1214480  0.3  0.7 22311168 125676 ?     Ssl   2025 965:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101568 65816 ?       Ssl   2025 870:45 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101060 66104 ?       Ssl   2025 869:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1101288 65296 ?       Ssl   2025 875:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1101572 66132 ?       Ssl   2025 871:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100928 66348 ?       Ssl   2025 868:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.4 1166184 65600 ?       Ssl   2025 859:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100384 64408 ?       Ssl   2025 855:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11844444 125684 ?     Ssl   2025 1790:57 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101816 65908 ?       Ssl   2025 868:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.6 11818752 114100 ?     Ssl  Apr20 786:04 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.5 1304464 83300 ?       Ssl  May31 161:50 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.8 11879748 147172 ?     Ssl  Apr25 545:42 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1177052 131856 ?      Ssl   2025 2723:35 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11804000 93312 ?      Ssl   2025 2046:31 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799488 84680 ?      Ssl   2025 1699:50 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332680 86868 ?       Ssl  Feb21 1264:35 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js