From: Adam Prescott <adam@...>
Date: 2013-03-15T02:55:12+09:00
Subject: Re: confusion with singleton method call

foo.class.instance_method(:talk) is specifically the method that
returns "huanng" (you need to pick less ambiguous choices of output)

class Foo
  def talk
    p "talk"
  end
end

>> Foo.instance_method(:talk)
=> #<UnboundMethod: Foo#talk>

If you bind it to an object, it is no longer unbound:

>> Foo.instance_method(:talk).bind(Foo.new)
=> #<Method: Foo#talk>

You're calling this Method instance, using the state in your instance
of Foo. This is different from sending message to an instance of Foo
(with foo.talk) and letting it do a method look-up. In the latter
case, it sees the singleton method as part of the look-up.