gistfile1.rb

    class Home
      require 'yaml'
      
      def initialize item
        @item = item
        
        attributes = File.expand_path('content' + @item.identifier.gsub(/\/$/,'') + '.yaml')
        attributes = File.open(attributes) { |a| YAML::load(a) }.keys
        
        attributes.map do |attribute|
          instance_variable_set("@#{attribute}", item[attribute.to_sym])
          instance_eval %{
            def #{attribute}
              instance_variable_get("@#{attribute}")
            end
          }
        end
      end
    end