From: Josh Charles <josh.charles@...>
Date: 2005-09-02T09:27:56+09:00
Subject: Re: palindrome finder

> palindrome = Regexp.new(<<'EOPALIN')
> (?x)(?i)\b
>        (?:(\S)                (?:\s|\p)*
>                (?:\S|(\S)         (?:\s|\p)*
>                        (?:\S|(\S)     (?:\s|\p)*
>                                (?:\S|(\S) (?:\s|\p)*
>                                \4)?       (?:\s|\p)*
>                        \3)?           (?:\s|\p)*
>                \2)?               (?:\s|\p)*
>        \1)
> \b
> EOPALIN
> 
> p "Win a Toyota blah".match(palindrome).to_s
> p "Why Abba rocks?".match(palindrome).to_s
> p "A Mismatch".match(palindrome).to_s
> 

Ok, I"m not even going to pretend to know how this code works exactly,
and was suitibly impressed when I ran it.  I don't know what to say
other than that.