From: Benoit Daloze <eregontp@...>
Date: 2010-09-30T17:58:32+09:00
Subject: Re: The beauty of Ruby through examples

On 30 September 2010 10:32, botp <botpena@gmail.com> wrote:
> On Thu, Sep 30, 2010 at 3:35 PM, F. Senault <fred@lacave.net> wrote:
>> def factorial(n)
>>  (1..n).inject(1, :*)
>> end
>> (I don't like much the second one, it's a bit less legible.)
>
> lose the 1.
>
> -botp

Except if you want factorial of 0 to be right.

While showing a cool example, I would go to:

class Integer
  def !
    (1..self).inject 1, :*
  end
end

0.! # => 1