From: Robert Klemme <shortcutter@...>
Date: 2007-07-25T20:46:12+09:00
Subject: Re: Detecting singletons

2007/7/25, Robert Dober <robert.dober@gmail.com>:
> On 7/25/07, Robert Dober <robert.dober@gmail.com> wrote:
> Did I do something stupid?

No, you seem to be dragged into the confusion between singleton and
singleton. :-)

> 694/194 > irb
> irb(main):001:0> require 'singleton'
> => true
> irb(main):002:0> s = "abc"
> => "abc"
> irb(main):003:0> sing = class << s; self end
> => #<Class:#<String:0xb7d9eaec>>
> irb(main):004:0> Singleton === s
> => false
> irb(main):005:0> Singleton === sing
> **********
> => false
> **********
> irb(main):006:0> puts "??????"
> ??????
> => nil
> irb(main):007:0>

The "singleton" you are referring to is the singleton class (btw, now
I understand your code suggestion).  I believe the OP wanted to know
about Singleton as in

class Foo
include Singleton
end

Kind regards

robert