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 1305060 85108 ?       Ssl   2025 818:03 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73028 ?       Ssl   2025 582:44 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11837072 117848 ?     Ssl   2025 1306:43 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11815844 103400 ?     Ssl   2025 921:39 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1331116 85324 ?       Ssl   2025 1268:26 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1304408 72756 ?       Ssl   2025 592:22 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1302356 71328 ?       Ssl   2025 581:54 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  2.7 12153056 449620 ?     Ssl   2025 6854:02 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  2.9  1.5 11946912 254652 ?     Ssl   2025 4578:16 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.4  0.7 22311424 126384 ?     Ssl   2025 270:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1102592 66436 ?       Ssl   2025 208:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1102852 67420 ?       Ssl   2025 207:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101800 65624 ?       Ssl   2025 209:20 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1102852 66660 ?       Ssl   2025 208:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1102464 67108 ?       Ssl   2025 207:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100136 63592 ?       Ssl   2025 204:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1099616 62468 ?       Ssl   2025 203:56 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.8  0.7 11709576 124696 ?     Ssl   2025 519:37 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1101816 66120 ?       Ssl   2025 207:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1674323  0.3  0.3 1099360 64080 ?       Ssl  Feb07   4:37 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1776176  0.0  0.0   2608   596 ?        S    01:52   0:00 sh -c ps -aux | grep node
www-data 1776178  0.0  0.0   3304   716 ?        S    01:52   0:00 grep node
sasa     2628167  0.9  0.8 1174972 131576 ?      Ssl   2025 1260:58 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11816132 99528 ?      Ssl   2025 895:28 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84744 ?      Ssl   2025 703:48 node /home/sasa/@mikosoft/dodo-examples/server/index.js