From: Robert Dober <robert.dober@...>
Date: 2006-07-27T17:42:47+09:00
Subject: Positive lookahead in multiline strings (was gsub)

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I was just rolling my own little thread about gsub  ;]
and trying to fix my stupid regexen when
I came up with the perfect solution to replace the last occurence of a
pattern (if it is simple, thus not of any interest to the OP of the OT).

Consider this

string.reverse.sub("<","").reverse  is fast
but

string.sub(Regexp.new("<(?=3D[^<]*$)", Regexp::MULTILINE), "")

is almost three times as fast (to my surprise), only that it does not work
if there are newlines in the string, they match $.
Is there a way to anchor on the end of the string in multiline strings.

Just didn't find it.

Ty in advance

Robert

--=20
Deux choses sont infinies : l'univers et la b=EAtise humaine ; en ce qui
concerne l'univers, je n'en ai pas acquis la certitude absolue.

- Albert Einstein

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