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        1273  0.6  0.4 1303368 81372 ?       Ssl  Sep21 296:35 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1293  1.2  0.8 11723240 136248 ?     Ssl  Sep21 588:02 node /home/sasa/dex8/dex8-api/starter.js
sasa        1298  0.5  0.4 1310104 79208 ?       Ssl  Sep21 237:53 node /home/sasa/regoch/regoch-www/server
sasa        1309  0.4  0.4 1299684 67032 ?       Ssl  Sep21 206:44 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1320  0.9  0.6 11810608 102540 ?     Ssl  Sep21 433:41 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1329  0.6  0.5 11807972 94600 ?      Ssl  Sep21 309:58 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1340  0.8  0.5 1199580 82592 ?       Ssl  Sep21 421:55 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1357  0.4  0.4 1302452 72788 ?       Ssl  Sep21 208:51 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1381  0.4  0.4 1297880 65708 ?       Ssl  Sep21 206:04 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1417  0.7  0.6 11817468 100284 ?     Ssl  Sep21 336:36 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1477  0.4  0.4 11794680 77768 ?      Ssl  Sep21 227:11 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1966  1.2  0.8 11837600 137120 ?     Ssl  Sep21 577:29 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1026987  0.8  0.6 1155864 112472 ?      Ssl  Oct15 105:35 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     1041499  0.7  0.8 22320204 138756 ?     Ssl  Sep27 297:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041553  2.3  1.0 22357744 176956 ?     Ssl  Sep27 918:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041586  0.4  0.4 1167976 67200 ?       Ssl  Sep27 170:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041612  0.4  0.4 1167200 66136 ?       Ssl  Sep27 170:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041650  0.4  0.4 1168736 67964 ?       Ssl  Sep27 170:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041678  0.4  0.4 1167460 66900 ?       Ssl  Sep27 170:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041713  0.4  0.3 1166436 64956 ?       Ssl  Sep27 170:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041745  0.4  0.4 1167460 66000 ?       Ssl  Sep27 170:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041773  0.4  0.3 1099108 63460 ?       Ssl  Sep27 164:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1041811  0.4  0.3 1099616 63756 ?       Ssl  Sep27 166:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1617980  1.9  1.3 11951724 215244 ?     Ssl  Oct15 241:51 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa     2229224 21.0  0.3 1027056 51836 ?       Rsl  07:33   0:00 node /home/sasa/crypto/dex-arbitrage-bot/scripts/observer/blockW
www-data 2229243  0.0  0.0   2608   596 ?        S    07:33   0:00 sh -c ps -aux | grep node
www-data 2229245  0.0  0.0   3304   720 ?        S    07:33   0:00 grep node