Need some regex help

[Lan Barnes]

On Wed, Mar 23, 2005 at 05:57:20PM -0600, Gabriel Sechan wrote:
> 
> 
> >From: Brian Deacon <brian at navelplace.com>
> >
> >^((crazy)( )*[;\,]( )*)*(crazy)( )*[;\,]?$
> >
> >Gack... even that version looks gnarly...
> >
> >Anywho... the idea is to verify that the input is a string of either
> >comma or semi-colon delimited instances of "crazy".  Any amount of
> >spaces surrounding the delimiters.  The catch is that I don't want to
> >require that the input end in a delimiter, so that any of these would
> >be valid:
> >crazy
> >crazy, crazy
> >crazy,crazy,crazy
> >crazy,crazy;crazy;
> >
> Wouldn't
> 
> (\w*crazy\w*)([\,;](\w*crazy\w*))*
> 
> do this?  (\w*crazy\w*)  should be crazy followed by any amount of white 
> space.  [\,;]\w*crazy\w* should be crazy preceeded by a , or ; with any 
> amount of whitespace.  By *ibng that part, you can have any number of 
> additional crazies.  Actually on relook, I think I got almost the same 
> thing except I used \w for whitespace, which seems like a better choice 
> than ( ) and I put the optional crazies on the end, not the begining.
> 

Um ... \w means word char [A-Za-z0-0etc] and \s means white space.

> >And the above works fine for that.  The problem is that I'm not actually
> >looking for the word "crazy", I'm looking for valid smtp email
> >addresses.  I stole a >500 character long regex from regexlib.com
> >Umm... this one:
> >http://www.regexlib.com/REDetails.aspx?regexp_id=328
> >
> Thats because SMTP is absolutely insane in the number of legal options for 
> an email address (an IP is a legal address for some reason).  If you need 
> to work with anything, you need something complex.
> 
> Gabe
> 
> 
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-- 
Lan Barnes                    lan at falleagle.net
Linux Guy, SCM Specialist     858-354-0616