From: Dave Bass <davebass@...>
Date: 2008-07-09T20:30:46+09:00
Subject: Re: String get domain name from web address

John Butler wrote:
> Hi,
> 
> I could have a any web address, www.yahoo.com, http://yahoo.com/,
> http://www.yahoo.com/, http://www.yahoo.co.uk/  so i want i need is some
> ruby code that will always return the domain name "yahoo.com"
> 
> Im not sure what the best way to this as the domain name isnt always in
> the same format.
> 
> Anyone got some ideas on how to get this as accuarte as possible??
> 
> JB

For the examples you've shown, doing a regexp match on "yahoo.co" would 
pick up all of them.

Note that x.com and x.co.uk are two separate domains, and might be 
completely unconnected with each other. If you want to consider them as 
the same domain, it would be better to detect them separately, then map 
one to the other using a lookup table (Ruby hash).

Dave
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