From: Luciano Ramalho <ramalho@...>
Date: 2007-02-09T15:18:00+09:00
Subject: Re: Your favorite bit of ruby code?

John's snipped is brilliant. I just thought the last line could be like this:

######

# Ruby is Objects all the way down and open for extension...
class Integer
  def factorial
    return 1 if self <= 1
    self * (self-1).factorial
  end
end

puts 1000.factorial

######

Using puts makes it work outside of irb, and 1000.factorial shows off Bignum.

It's a pity the factorial method can't be named just "!"...

Cheers,

Luciano




On 2/9/07, Luciano Ramalho <ramalho@gmail.com> wrote:
> On 2/8/07, John Carter <john.carter@tait.co.nz> wrote:
> > # Ruby is Objects all the way down and open for extension...
> >
> > class Integer
> >    def factorial
> >      return 1 if self <= 1
> >      self * (self-1).factorial
> >    end
> > end
> >
> > 6.factorial
> > 720
> >
> >
> >
> >
> > John Carter                             Phone : (64)(3) 358 6639
> > Tait Electronics                        Fax   : (64)(3) 359 4632
> > PO Box 1645 Christchurch                Email : john.carter@tait.co.nz
> > New Zealand
> >
> >
> >
>