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  1.2  0.6 1325612 100016 ?      Ssl  Oct18 365:42 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211  7.7  0.7 11843840 118132 ?     Ssl  Oct18 2209:51 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11803120 83836 ?      Ssl  Oct18 127:28 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.5 11807220 96788 ?      Ssl  Oct18 225:07 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11807420 90908 ?      Ssl  Oct18 132:17 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1331640 83316 ?       Ssl  Oct18 184:42 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1300372 67220 ?       Ssl  Oct18  89:53 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.4 1298544 65616 ?       Ssl  Oct18  88:28 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11847648 124056 ?     Ssl  Oct18 131:20 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.7 1163820 117212 ?      Ssl  Oct18 192:42 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.5  3.8 12358028 636328 ?     Ssl  Oct18 1000:39 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797452 80540 ?      Ssl  Oct18  97:53 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1100896 63272 ?       Ssl  Oct18  90:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.4 22278316 77920 ?      Ssl  Oct18  91:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1101284 65236 ?       Ssl  Oct18  89:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1101156 64568 ?       Ssl  Oct18  89:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1100896 64796 ?       Ssl  Oct18  90:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1101152 65380 ?       Ssl  Oct18  89:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1101040 64672 ?       Ssl  Oct18  89:37 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1100896 65044 ?       Ssl  Oct18  89:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1100896 64644 ?       Ssl  Oct18  89:46 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1100896 64328 ?       Ssl  Oct18  89:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.6  4.0 12368988 657324 ?     Ssl  Oct18 193:48 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.6  0.5 1331820 85416 ?       Ssl  Oct21 155:08 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.1  1.1 11912008 182444 ?     Ssl  Oct21 288:20 node /home/sasa/miko/miko-hr/server/index.js
www-data 2166239  0.0  0.0   2608   592 ?        S    08:37   0:00 sh -c ps -aux | grep node
www-data 2166241  0.0  0.0   3304   716 ?        S    08:37   0:00 grep node