From: Farrel Lifson <farrel.lifson@...>
Date: 2006-03-29T17:10:59+09:00
Subject: Re: Range#to_a, each - why inconsistent?

I initially thought it was because "".succ == "" which is not correct,
however I created a custom class that returns itself when succ is
called:

class BadSucc
  include Comparable
  attr_accessor :value
  def <=>(other)
    self.value <=> other.value
  end
  def succ
    self
  end
end

But this did not seem to work
irb(main):002:0> b = BadSucc.new
=> #<BadSucc:0x2dc49a8>
irb(main):003:0> b.value = 1
=> 1
irb(main):008:0> (b..b).to_a
=> [#<BadSucc:0x2dc49a8 @value=1>]

So it seems like it might be a bug to me or there is some other reason
why ("".."").to_a returns empty while (b..b).to_a doesn't.

Farrel