Re: reg ex NOT

[^t] matches any character but t. It can be modified using ?, + and *, as usual.

You might also be interested in (?:(?!regexp).)*, which matches a sequence of characters that does not contain anything that matches a specified regexp.

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Re^2: reg ex NOT by brian_d_foy (Abbot) on Jun 16, 2006 at 00:18 UTC
Remember that using `` means to match zero or more times and that `?` matches zero or one times, and that you can always match zero times. When you match zero times, you don't prevent anything from not matching: `print "Matched" if "dont" =~ m/don(?:(?!t).)/;` [download] You could anchor it so that nothing after it could match: `print "Matched" if "dont" =~ m/don(?:(?!t).)*$/;` [download] It's easier just to type the negated character class for that position, though: `print "Matched" if "dont" =~ m/don[^t]/;` [download] -- brian d foy <brian@stonehenge.com> Subscribe to The Perl Review	[reply] [d/l] [select]
Re^3: reg ex NOT by ikegami (Patriarch) on Jun 16, 2006 at 01:33 UTC
Aye, the construct I posted needs to be anchored (but not necessarily using `^` and `$`). It may be a waste to use that construct for single characters, but it's useful (necessary) for the use I described in my original post (i.e. To matche a sequence of characters that does not contain anything that matches a specified regexp). For example, `/<table>(?:(?!<\/table>).)*<\/table>/` [download] (Not the best example, cause tables can be nested in HTML and for other reasons, but you get the idea.)	[reply] [d/l] [select]