From: Joel VanderWerf <vjoel@...>
Date: 2002-06-07T05:17:16+09:00
Subject: Re: Returning an instance from a different class from new

Jos Backus wrote:
> 
> [For some reason I am no longer subscribed to ruby-talk and I don't get any
> mail back from the ctl address, which is why I have to use my provider's
> crappy newsserver :-(]
> 
> How do I make the following return Bar instead of Foo?
> 
> class Foo
DEL>def initialize(sel)
    def self.new(sel=nil)
>     case sel
>       when "1"
>         return Bar.new
>       when "2"
>         return Baz.new
        when nil
          super()
>     end
>   end
> end
> 
> class Bar < Foo
DEL>def initialize
DEL>  self
DEL>end
> end
> 
> class Baz < Foo
DEL>def initialize
DEL>  self
DEL>end
> end
> 
> o = Foo.new("1")
> p o.type