From: Mark Thomas <mark@...>
Date: 2009-08-13T22:10:09+09:00
Subject: Re: Background on why Ruby doesn't support ++

Don't forget there's already

x.next

although there is not the orthogonal x.prev, which seems like the
Principle of Most Surprise in effect :-). One way to rectify that is
to open up Integer yourself:

class Integer
  def prev
    self - 1
  end
end