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From: | Stefan Monnier |
Subject: | Re: efficient regular expression that never matches |
Date: | Fri, 20 Nov 2015 10:13:11 -0500 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) |
> I'm thinking of "$a", but it should scan all the string until end > of the string, so it may not be efficient. IIRC I used something like "\\`\\'a". Stefan
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