I really had trouble with negation too. It looks like the
characters
in between emacs and Mozilla Firefox are giving you trouble.
Try this
pattern and see if it works:
emacs(?!([s]?Mozilla Firefox))
Of course this will only work if there is either one or no
spaces
between "Mozilla Firefox" and "emacs".
It really helps if you have a tool that lets you test your
patterns
against text blocks. I've seen some mentioned in the posts
in this
group, but I can't remember any off the top of my head.
On Mar 19, 12:05 pm, "dataangel" <k04j... gmail.com> wrote:
> I'm trying to write a regex that matches for
"emacs" but only when not
> followed by "Mozilla Firefox". This is what I
came up with:
>
> emacs(?!.*(Mozilla Firefox))
>
> But that didn't work. I also tried
>
> emacs.*(?!(Mozilla Firefox))
>
> But that didn't work either. Same with:
>
> emacs(?!((Mozilla Firefox)$))
>
> What's the right way to do this? :P
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