From: Seth Thomas Rasmussen <sethrasmussen@...>
Date: 2006-07-13T22:20:08+09:00
Subject: Re: Help with a regexp

Hi Daniel,

Daniel Schierbeck wrote:
> I'm trying to write a regular expression that matches bencoded strings,
> i.e. strings on the form x:y, where x is the numeric length of y.
>
> This is valid:
>
>    6:foobar
>
> while this is not:
>
>    4:foo
>
> I've tried using #{$1} inside the regexp, but it seems $1 is still nil
> at that point.

I think you can do what you want there, but if you're using captures
within the regex they are captured in, you denote them as \1, \2, etc.

%r{<(foo)></\1>} # should match a pair of empty "foo" tags

Peas,
---
Seth Thomas Rasmussen
http://sethrasmussen.com