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        1197  1.5  0.6 1326748 99272 ?       Ssl  Oct18 297:16 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211  9.6  0.6 11708932 113560 ?     Ssl  Oct18 1909:23 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11801072 83792 ?      Ssl  Oct18  87:10 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.6 11808920 99712 ?      Ssl  Oct18 151:44 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11807932 87580 ?      Ssl  Oct18  88:55 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1332664 84148 ?       Ssl  Oct18 126:34 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1300692 67560 ?       Ssl  Oct18  61:44 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.4 1298372 65644 ?       Ssl  Oct18  60:36 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11842048 125684 ?     Ssl  Oct18  88:32 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.6 1163264 114612 ?      Ssl  Oct18 135:48 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.7  4.3 12414636 718488 ?     Ssl  Oct18 746:47 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797452 80564 ?      Ssl  Oct18  66:00 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1100384 62972 ?       Ssl  Oct18  61:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.4 22278572 77580 ?      Ssl  Oct18  62:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1100772 64080 ?       Ssl  Oct18  61:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1100644 64724 ?       Ssl  Oct18  61:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1100384 64516 ?       Ssl  Oct18  61:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1100640 64636 ?       Ssl  Oct18  61:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1100784 64704 ?       Ssl  Oct18  61:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1100384 64632 ?       Ssl  Oct18  61:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1100384 64408 ?       Ssl  Oct18  61:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1100384 64076 ?       Ssl  Oct18  61:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.6 11815204 103456 ?     Ssl  Oct18  90:45 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.6  0.5 1330540 83340 ?       Ssl  Oct21  95:07 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.2  1.1 11923880 194320 ?     Ssl  Oct21 183:25 node /home/sasa/miko/miko-hr/server/index.js
www-data 1518998  0.0  0.0   2608   524 ?        S    06:08   0:00 sh -c ps -aux | grep node
www-data 1519000  0.0  0.0   3304   720 ?        S    06:08   0:00 grep node