From: Trans <transfire@...>
Date: 2006-03-14T23:38:46+09:00
Subject: Re: Alternate notation for eigenclass

> Or singleton_class, which is what it's called :-)

Really?

   x = "A"
  => "A"
  irb(main):002:0> x.singleton_class
  NoMethodError: undefined method `singleton_class' for "A":String
          from (irb):2

Yet...

  irb(main):003:0> require 'singleton'
  => true
  irb(main):004:0> class A
  irb(main):005:1>    include Singleton
  irb(main):006:1> end
  => A

T.