From: Joe Van Dyk <joevandyk@...>
Date: 2005-06-27T14:57:22+09:00
Subject: Re: I saw the beauty of Ruby Re: 1. Ruby result: 101 seconds , 2. Java result:9.8 seconds, 3. Perl result:62 seconds

On 6/26/05, jzakiya@mail.com <jzakiya@mail.com> wrote:
> > class Integer
> > def primes
> > f=2
> > p=[] if self <2
> > p=[2] if self >=2
> > 3.step(self, 2) do |i|
> > r = Math.sqrt(i).to_i
> > p.each { |f| break if (i%f).zero? or f > r}
> > p.push(i) if (i%f).nonzero?
> > end # end the do block
> > return p
> > end
> > end
> 
> To make shorter/clearer(?) replace
> 
>      p=[] if self <2
>      p=[2] if self >=2
> 
> with
> 
>      p = self > 1 ? [2] : []

I vote for shorter, not clearer.