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  1.3  0.6 1325964 98412 ?       Ssl  Oct18 316:46 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211  7.9  0.7 11841532 115964 ?     Ssl  Oct18 1932:51 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11801072 85652 ?      Ssl  Oct18 107:31 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.6 11831116 108608 ?     Ssl  Oct18 186:22 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11807932 90240 ?      Ssl  Oct18 111:08 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1331128 82596 ?       Ssl  Oct18 156:12 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1300884 67900 ?       Ssl  Oct18  75:56 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1298272 64756 ?       Ssl  Oct18  74:41 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.7 11852800 129084 ?     Ssl  Oct18 109:12 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.7 1165972 117016 ?      Ssl  Oct18 164:26 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.5  3.9 12371596 645264 ?     Ssl  Oct18 869:24 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797708 80544 ?      Ssl  Oct18  82:05 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1101920 64688 ?       Ssl  Oct18  76:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.4 22278828 77888 ?      Ssl  Oct18  77:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.4 1102052 65652 ?       Ssl  Oct18  75:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.4 1101924 66084 ?       Ssl  Oct18  75:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.4 1101920 66008 ?       Ssl  Oct18  76:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.4 1101920 66420 ?       Ssl  Oct18  76:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.4 1102064 65840 ?       Ssl  Oct18  75:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.4 1101664 65960 ?       Ssl  Oct18  75:55 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1101664 65240 ?       Ssl  Oct18  75:58 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.4 1101920 65536 ?       Ssl  Oct18  75:42 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11807768 96304 ?      Ssl  Oct18 119:56 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.6  0.5 1330796 84764 ?       Ssl  Oct21 125:41 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.2  1.0 11869512 169860 ?     Ssl  Oct21 238:39 node /home/sasa/miko/miko-hr/server/index.js
www-data 1846950  0.0  0.0   2608   524 ?        S    08:48   0:00 sh -c ps -aux | grep node
www-data 1846952  0.0  0.0   3304   656 ?        S    08:48   0:00 grep node