From: Pete Yandell <pete.yandell@...>
Date: 2006-10-27T08:29:45+09:00
Subject: Re: simple math question


On 26/10/2006, at 9:25 AM, Robert Oliver wrote:

> You can determine if a number is odd by doing this:
>
> class Fixnum
>  def odd?
>    if self % 2 == 0
>      return nil
>    else
>      return true
>    end
>  end
>  def even?
>    if self % 2 == 0
>      return true
>    else
>      return nil
>    end
>  end
> end

Argh! Ok, I keep coming across code like this, and it's driving me  
nuts. It's like writing:

   if true then true else false end

Well, duh! :)

Just write this:

   class Fixnum
     def odd?
       self % 2 == 1
     end
     def even?
       self % 2 == 0
     end
   end


Pete Yandell
http://notahat.com/