From: ThoML <micathom@...>
Date: 2008-07-03T20:31:56+09:00
Subject: Re: nested methods good or bad design

> the first method checked a server for something.
> All of the other methods check an instance variable

I don't know when you check the server. Maybe something like this
would be a viable solution (#create could check the server):

class A
    def self.create(x)
        case x
        when 0
            A1.new(x)
        else
            A2.new(x)
        end
    end

    def initialize(x)
        @x = x
    end
end

class A1 < A
    def f
        nil
    end
end

class A2 < A
    def f
        20 + @x
    end
end

p A.create(0).f
=> nil
p A.create(1).f
=> 21