From: Wesley J Landaker <wjl@...>
Date: 2002-05-03T04:16:19+09:00
Subject: Re: regexp help: contains only one tag

On Thursday 02 May 2002 01:07 pm, Morris, Chris wrote:
>   def test_contains_only_a_tag
>     re = /.*<.*>.*/
>     assert( ('<tag>' =~ re))
>     assert(!('<tag' =~ re))
>     assert(!('tag>' =~ re))
>     assert(!('tag' =~ re))
>     assert(!('' =~ re))
>     assert(!('  ' =~ re))
>     assert( ('  < t a g >  ' =~ re))
>     assert(!('<t>a<g>' =~ re))
>   end
>
> My re passes them all except the last one, which is the one I need
> help with. Any takers? :)

Well, /.*<.*>.*/ obviously matches your last test, so of course that's 
going to fail! =)

Try something like this instead:

re = /^[^<]*<[^<>]*>[^>]$/

(You'll need to add some extra things to verify, for instance, that the 
text inside the tag is valid, or whatever else you want...)

-- 
Wesley J. Landaker - wjl@icecavern.net
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