From: Benjohn Barnes <benjohn@...>
Date: 2006-03-11T19:36:26+09:00
Subject: Re: Help me understand why the Ruby block is slower than wit

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On 11 Mar 2006, at 02:13, George Ogata wrote:

> Another speedup:  replace:
>
>   w.split(//).uniq.size == 11
>
> with:
>
>   w !~ /(.).*\1/

!? :) How on earth does that work? Every time I think I've sort of  
got the hang of regexp, they spring something new on me.

I was also going to ask why everyone was doing "split( // )" instead  
of "split( '' )"?

- oooh, coffee's ready...

Cheers,
	Benjohn
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