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 1306796 85920 ?       Ssl   2025 1327:31 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1303464 71444 ?       Ssl   2025 956:12 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11816276 105404 ?     Ssl   2025 1511:56 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73188 ?       Ssl   2025 970:05 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298500 69092 ?       Ssl   2025 954:52 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.7 12143072 446208 ?     Ssl   2025 12397:18 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  4.1  2.8 12131764 467960 ?     Ssl   2025 11347:34 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 126120 ?     Ssl   2025 689:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101568 65660 ?       Ssl   2025 607:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100804 65956 ?       Ssl   2025 606:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1101032 65200 ?       Ssl   2025 610:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1102084 65524 ?       Ssl   2025 607:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1101696 66940 ?       Ssl   2025 605:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.4 1102440 66092 ?       Ssl   2025 596:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1101152 64380 ?       Ssl   2025 594:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11708864 124420 ?     Ssl   2025 1178:44 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1102840 66944 ?       Ssl   2025 605:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.9  0.7 11829068 115180 ?     Ssl  Apr20 146:42 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1904154  0.5  0.6 11853868 112216 ?     Ssl  Apr25  52:26 node /home/sasa/miko/miko-hr/server/index.js
sasa     2538035  0.3  0.3 1100380 64880 ?       Ssl  04:02   3:14 node /home/sasa/dex8/dex8-worker/starter.js
www-data 2612314  0.0  0.0   2608   592 ?        S    20:40   0:00 sh -c ps -aux | grep node
www-data 2612316  0.0  0.0   3304   720 ?        S    20:40   0:00 grep node
sasa     2628167  0.8  0.8 1178968 133524 ?      Ssl   2025 2172:19 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11823552 98624 ?      Ssl   2025 1574:36 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84784 ?      Ssl   2025 1303:04 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332748 87228 ?       Ssl  Feb21 697:07 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js