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         831  0.5  0.4 1303828 79284 ?       Ssl  Jun15 129:13 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         843  0.5  0.6 11699640 104628 ?     Ssl  Jun15 125:13 node /home/sasa/dex8/dex8-api/starter.js
sasa         858  0.4  0.4 1304364 73232 ?       Ssl  Jun15  97:50 node /home/sasa/regoch/regoch-www/server
sasa         867  0.3  0.4 1298972 67252 ?       Ssl  Jun15  92:09 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         886  0.7  0.6 11828564 105404 ?     Ssl  Jun15 193:34 node /home/sasa/dex8/dex8-www/server/index.js
sasa         888  0.5  0.4 11792244 78056 ?      Ssl  Jun15 135:18 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         904  0.7  0.5 1329652 82012 ?       Ssl  Jun15 179:44 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         910  0.3  0.4 1300240 69644 ?       Ssl  Jun15  93:00 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         969  0.3  0.3 1297484 64312 ?       Ssl  Jun15  91:54 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         970  0.6  0.5 11810464 94176 ?      Ssl  Jun15 165:34 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1010  0.6  0.6 1147316 103116 ?      Ssl  Jun15 155:15 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1016  0.8  1.1 11881932 190292 ?     Ssl  Jun15 206:42 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1086  0.4  0.4 11794656 78096 ?      Ssl  Jun15  99:37 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1089  0.3  0.3 1099612 64484 ?       Ssl  Jun15  94:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1159  0.3  0.4 22279740 79916 ?      Ssl  Jun15  95:53 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1160  0.3  0.3 1099612 63584 ?       Ssl  Jun15  94:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1241  0.3  0.3 1100952 63444 ?       Ssl  Jun15  94:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1242  0.4  0.4 22278236 78328 ?      Ssl  Jun15 100:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1323  0.3  0.3 1099100 63508 ?       Ssl  Jun15  94:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1324  0.3  0.3 1099616 63372 ?       Ssl  Jun15  94:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1398  0.3  0.3 1099104 63072 ?       Ssl  Jun15  94:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1400  0.3  0.3 1099356 63436 ?       Ssl  Jun15  94:40 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1465  0.3  0.3 1099104 63804 ?       Ssl  Jun15  94:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa      178968  0.8  0.5 11810408 97968 ?      Ssl  Jun17 174:53 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      337381  1.2  1.4 1466872 242060 ?      Ssl  Jun19 225:32 node /home/sasa/crypto/dex-arbitrage-bot/scripts/observer/index2
www-data 1247794  0.0  0.0   2608   592 ?        S    03:00   0:00 sh -c ps -aux | grep node
www-data 1247796  0.0  0.0   3304   652 ?        S    03:00   0:00 grep node