From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-09-30T19:28:07+09:00
Subject: Re: extend keyword in class definition

ruud grosmann wrote:
> Isn't a singleton method a method that applies to the
> singleton class of one object?

It is a method that is defined on the singleton class of an object, yes.
As a singleton class by definition only has one instance that means that a 
singleton method is a method that can be called on a single object and that 
object only.

> And in this case we're talking about a 
> class, not an object?

A class is an object:
>> String.is_a? Class
=> true
>> String.is_a? Object
=> true
>> String.object_id
=> -605959678

> As such, Forwardable is mixed in, is my first thought.

It is mixed in. It's mixed into WriterDecorator's singleton class.

> What have I understood wrongly?

I'm not sure. Maybe you mistakenly assumed that a class is its own singleton 
class?

HTH,
Sebastian
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