From: Phrogz <phrogz@...>
Date: 2007-11-24T23:39:59+09:00
Subject: Re: Access modifier : private

On Nov 24, 4:57 am, Dharmarth Shah <dharma...@gmail.com> wrote:
> Thanks a lot Stefano! That was really helpful.
>
> One more help.
>
> What's the rationale in sharing Class level variables with subclasses?
> Is there any way to restrict Class level variables and Class level
> methods to restrict to class itself?

Instead of using class level variables, use instance variables of the
class itself. It's what most people want anyhow:

irb(main):001:0> class Foo
irb(main):002:1>   @jim = :foo
irb(main):003:1>   class << self
irb(main):004:2>     attr_accessor :jim
irb(main):005:2>   end
irb(main):006:1> end

irb(main):007:0> class Bar < Foo
irb(main):008:1>   @jim = :bar
irb(main):011:1> end

irb(main):012:0> Foo.jim
=> :foo

irb(main):013:0> Bar.jim
=> :bar

irb(main):014:0> Foo.jim = 42
=> 42

irb(main):015:0> Bar.jim
=> :bar

irb(main):016:0> Bar.jim = 'whee'
=> "whee"

irb(main):017:0> Foo.jim
=> 42

etc.