From: leon breedt <bitserf@...>
Date: 2004-06-26T13:12:30+09:00
Subject: Re: "attr" like functions

On Sat, 26 Jun 2004 09:22:57 +0900, Ben Giddings
<bg-rubytalk@infofiend.com> wrote:
> 1) Is there a way to add the 'attr_with_desc' method without having to
> modify the Module class?  I'd like to keep it pristine, if possible.
not sure why you're putting a class method in Module, putting it in
the class itself would suffice?

--<snip>--

class Describable
  def Describable.attr_with_desc(id, description)
    attr_accessor id
    @@desc ||= {}
    @@desc["@#{id.id2name}"] = description.to_s
  end
  def pretty_print
    instance_variables.each { |var|
      if @@desc.has_key?(var)
        puts "#{@@desc[var]}: #{eval(var)}"
      else
        puts "Instance var #{var}: #{eval(var)}"
      end
    }
  end
end

class Test<Describable
  attr_with_desc :name, "Name of the test"
  attr_with_desc :version, "Version of the test"
end

t = Test.new
t.name = "test"
t.version = 1.0
t.pretty_print

--<snip>--

regards,
leon