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 1305960 84092 ?       Ssl   2025 1452:12 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 72112 ?       Ssl   2025 1033:07 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11821476 107716 ?     Ssl   2025 1632:20 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73104 ?       Ssl   2025 1047:42 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298516 68688 ?       Ssl   2025 1031:43 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.9 12166212 476952 ?     Ssl   2025 13439:57 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  4.6  3.4 12221156 562488 ?     Ssl   2025 13927:04 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      212912  0.3  0.3 1101152 65212 ?       Ssl  04:03   3:23 node /home/sasa/dex8/dex8-worker/starter.js
www-data  290429  0.0  0.0   2608   592 ?        S    21:41   0:00 sh -c ps -aux | grep node
www-data  290431  0.0  0.0   3304   644 ?        S    21:41   0:00 grep node
sasa     1214480  0.3  0.7 22311168 126012 ?     Ssl   2025 774:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101312 66460 ?       Ssl   2025 689:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101060 66500 ?       Ssl   2025 687:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101288 65556 ?       Ssl   2025 692:53 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1101316 65680 ?       Ssl   2025 689:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100672 65876 ?       Ssl   2025 687:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166184 65232 ?       Ssl   2025 677:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 64632 ?       Ssl   2025 675:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.8 11845212 131252 ?     Ssl   2025 1490:37 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101816 65904 ?       Ssl   2025 686:45 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.7 11828828 118508 ?     Ssl  Apr20 349:41 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1904154  0.6  0.6 11829244 106124 ?     Ssl  Apr25 205:47 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176408 131508 ?      Ssl   2025 2351:42 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11802568 91036 ?      Ssl   2025 1717:30 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 83928 ?      Ssl   2025 1425:45 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332492 85900 ?       Ssl  Feb21 875:46 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js