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  1.8  0.6 1326956 101584 ?      Ssl  Oct18 199:03 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211 12.1  0.6 11705656 109068 ?     Ssl  Oct18 1329:31 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11801964 84672 ?      Ssl  Oct18  47:46 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.6 11826804 112244 ?     Ssl  Oct18  79:20 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11806236 90260 ?      Ssl  Oct18  46:46 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1331640 84216 ?       Ssl  Oct18  69:15 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1299700 66956 ?       Ssl  Oct18  34:18 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1297888 64620 ?       Ssl  Oct18  33:33 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11853536 129084 ?     Ssl  Oct18  48:02 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.6 1158684 111596 ?      Ssl  Oct18  70:33 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  2.8  2.6 12119880 426196 ?     Ssl  Oct18 311:50 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797056 80980 ?      Ssl  Oct18  36:03 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099360 64308 ?       Ssl  Oct18  34:20 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.3 1100136 65216 ?       Ssl  Oct18  34:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1099492 64192 ?       Ssl  Oct18  34:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1099364 63708 ?       Ssl  Oct18  34:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1099360 64412 ?       Ssl  Oct18  34:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1099616 63932 ?       Ssl  Oct18  34:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1099248 63408 ?       Ssl  Oct18  34:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099360 63820 ?       Ssl  Oct18  34:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099360 63640 ?       Ssl  Oct18  34:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099360 64052 ?       Ssl  Oct18  34:05 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11795996 83104 ?      Ssl  Oct18  49:03 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.5  0.5 1329864 83968 ?       Ssl  Oct21  36:31 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.0  1.0 11869512 168612 ?     Ssl  Oct21  69:07 node /home/sasa/miko/miko-hr/server/index.js
www-data  879505  0.0  0.0   2608   536 ?        S    02:43   0:00 sh -c ps -aux | grep node
www-data  879507  0.0  0.0   3304   648 ?        S    02:43   0:00 grep node