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  0.5  0.5 1305112 83548 ?       Ssl   2025 987:03 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73480 ?       Ssl   2025 707:40 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11834184 115528 ?     Ssl   2025 1570:01 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11819516 106680 ?     Ssl   2025 1119:30 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304152 73336 ?       Ssl   2025 718:35 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1301960 70876 ?       Ssl   2025 706:27 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.7 12146656 453628 ?     Ssl   2025 8839:07 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.1  1.9 11992532 311484 ?     Ssl   2025 6105:49 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      615251  0.3  0.4 1102940 67524 ?       Ssl  03:02   1:57 node /home/sasa/dex8/dex8-worker/starter.js
www-data  660919  0.0  0.0   2608   596 ?        S    12:55   0:00 sh -c ps -aux | grep node
www-data  660921  0.0  0.0   3304   648 ?        S    12:55   0:00 grep node
sasa     1214480  0.4  0.7 22311424 125516 ?     Ssl   2025 410:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1101312 65328 ?       Ssl   2025 341:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101060 66092 ?       Ssl   2025 340:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100776 65356 ?       Ssl   2025 343:05 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100804 64500 ?       Ssl   2025 341:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100416 65740 ?       Ssl   2025 340:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1099880 64104 ?       Ssl   2025 335:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1099360 63260 ?       Ssl   2025 334:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11708808 122540 ?     Ssl   2025 740:21 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100536 64180 ?       Ssl   2025 340:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2509059  0.6  0.5 11801944 92012 ?      Ssl  Feb14 184:43 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1177176 132808 ?      Ssl   2025 1572:58 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11823824 99988 ?      Ssl   2025 1117:11 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84652 ?      Ssl   2025 904:41 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1330464 83036 ?       Ssl  Feb21 123:06 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js