Re: [Regexp] a regexp question

[Hartwig, Thomas]

Sorry for not having a solution, except double processing the strings. 
Some years ago I found a regexp definition where strings could be 
defined as parts of a character class something for your problem would 
look like that: ^[^[:puppy:]]*kitty

But I can't remember where it was. However, I have your problem like you 
sometimes as well, but rewrite it with some kind of double processing.
The manpage of perlre contains a solution for that as well. Look for 
"Extended Patterns"

Finaly I wanted to affirm your problem and say that I'm interested in a 
standard solution as well.

Who knows about that?

Cheers
Thomas

Levent Yilmaz wrote:
> Hello,
>
> It sounded like a very simple problem but I couldn't come up with a 
> solution. I was trying to do this with Basic Regexp in grep:
>
> Find all lines which contain the word 'kitty'. But only those lines that 
> do not have 'puppy' somewhere before 'kitty'. For instance:
>
> my kitty is very cute
> but puppy is cuter than kitty
>
> What regular expression stands for the first line but not the second? 
> Note that the other way is very easy, that is the lines with 'puppy' 
> followed by 'kitty': puppy.*kitty
>
> thank you so very much!
> -Levent.
>
>
> PS: What is all this spam on the list by the way?
>
>
>
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--
Thomas Hartwig - Software & IT-Service Specialist

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