Adds attr instantiation and .all method to a class

helpers-all.rb

module Helpers
  module All
 
    def self.included(base)
      base.extend ClassMethods
    end
 
    def initialize(attributes = {})
      attributes.each do |key, value|
        instance_variable_set("@#{key}", value)
      end
      
      self.class.all << self
    end
 
    module ClassMethods
      def all
        @all ||= []
      end
    end
    
  end
end