Provide fallback when port is already in use

[Jarek Foksa]

The code below will throw an error If port 9999 is already in use:

websocketIO = require 'websocket.io'
server = websocketIO.listen(9999);

Instead of breaking the execution of the script, is there a way to
provide a fallback? E.g. if port 9999 is already in use, check port
9998 instead.

I have already tried wrapping the code above with try/catch statements
without success.

[Guillermo Rauch]

Pass a function callback and look for an Error object as first parameter. Then try listening gain on a different port.

--
Guillermo Rauch

LearnBoost CTO
http://devthought.com