From: Brian Candler <B.Candler@...>
Date: 2007-03-02T06:21:47+09:00
Subject: Re: Newbie Question

On Fri, Mar 02, 2007 at 06:12:40AM +0900, Brian Candler wrote:
>   def self.per_class
>     self.ancestors.each { |k|
>       k.instance_eval { return @per_class if defined? @per_class }
>     }
>   end

P.S. I first wrote this as:

  def self.per_class
    self.ancestors.each { |k|
      return k.instance_variable_get(:@per_class) if
             k.instance_variables.include?("@per_class")
    }
  end

I note that Object#instance_variables appears to return an array of strings,
not an array of symbols as I would have expected.

Also, I couldn't find anything like 'instance_variable_defined?', which is
why I ended up having to search through the whole array of all instance
variables. So the instance_eval form looked to be the better bet.

Regards,

Brian.