From: mengx@...
Date: 2002-01-03T04:15:54+09:00
Subject: [ruby-talk:30068] Re: A Bug or something else?

> 
> >>  All objects in ruby can have a string representation.
> 
> What about "nil"? This is how Smalltalk handles the conversion
> of the only instance of UndefinedObect, nil.
> 
> In fact, I am starting to get acquainted with Ruby. And I would
> like to know 'nil' is handled like 'null' in Java, or it has a
> class associated (just like Smalltalk UndefinedObject) which
> does not allow the creation of other instances?

It is a singleton class, according to doc.