From: Alan Chen <alan@...>
Date: 2002-04-20T01:27:11+09:00
Subject: Re: Ruby golf (FFT)  Was: Freshmeat article about Ruby

On Sat, Apr 20, 2002 at 01:11:54AM +0900, David Alan Black wrote:
> Hello --
> 
> On Sat, 20 Apr 2002, Christian Szegedy wrote:
> 
> > I start the golf game:
> 
> I highly recommend including the following disclaimer in every
> golf-related post:
> 
>   DISCLAIMER: I do not believe that reducing code to the
>   smallest possible size is always or even usually a good
>   idea.  However, I tend to learn a lot about Ruby from
>   this kind of exercise, and that's why I do it.
> 
> :-)
> 
> > (The function fft modifies the vals array in place.
> >   It must hold 2**n complex numbers.)
> >
> > require "complex"
> >
> > def fft(vals,n)
> >    size = 2**n
> >    j=0
> >    vals.map { |x| x/Math.sqrt(size) }
> 
> Shouldn't that be map! ?  Otherwise the result gets thrown away.
> 

Heh, maybe we should write a unit test so that we can golf faster ;)

-- 
Alan Chen
Digikata LLC
http://digikata.com