From: Carlos <angus@...>
Date: 2004-03-09T00:02:13+09:00
Subject: Re: proposal:  class<<obj to invoke extend_object

[Simon Strandgaard <neoneye@adslhome.dk>, 2004-03-08 04.24 CET]
[...]
> Sorry.. this doesn't work in the following example.
> I have tried with instance_eval, but no luck either.
> 
> server> ruby a.rb
> a.rb:9: undefined local variable or method `init' for #<Class:#<String:0x810aa08>> (NameError)
> server> expand -t2 a.rb 
> obj = "text"
> class << obj
>   def init
>     @str = "hello"
>   end
>   def hello
>     puts @str
>   end
>   init
> end
> obj.hello
> server>

Maybe you should ask for a method #singleton for singleton classes,
that returns the object... ;)