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Re^2: regex for negating a sequence

by ikegami (Pope)
on Oct 03, 2006 at 19:35 UTC ( #576172=note: print w/replies, xml ) Need Help??

in reply to Re: regex for negating a sequence
in thread regex for negating a sequence

Your regexp can be simplified to the following:


If you'd rather have simplicity at the cost of an extra check, use the following:


is the equivalent of
but it (negatively) matches entire regexps instead of a choice of characters.

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Re^3: regex for negating a sequence
by ysth (Canon) on Oct 03, 2006 at 20:25 UTC
    Another alternative:
    I've interpreted "does not appear" differently than you when the eighth char is the \x26 of a \x26\x67 sequence.
Re^3: regex for negating a sequence
by davidrw (Prior) on Oct 03, 2006 at 20:40 UTC
    nice. My first attempt was trying to do it like that, but i started with something like:
    which doesn't work for the case of consectutive sequences.. i just didn't think of putting the look-ahead behind the dot :)

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