From: Xavier Noria <fxn@...>
Date: 2010-09-22T06:02:02+09:00
Subject: Re: comparing the first half of a string to the second half

On Tue, Sep 21, 2010 at 10:55 PM, Adam Prescott <mentionuse@gmail.com> wrote:

> I think a regular expression is probably the most succinct, cleanest
> approach for this:
>
> s = "Cyano The Cat" * 2
> if s =~ /^(.+)\1$/
>  puts $1
> end

Clever, but almost: "aa\n" passes and it shouldn't.

For an arbitrary string you want \A and \z (and /m).