ostruct.rb

class OpenStruct
  def new_ostruct_member(name)
    name = name.to_sym
    unless self.respond_to?(name)
      class << self; self; end.class_eval do
        define_method(name) { @table[name] }
        define_method("#{name}=") { |x| modifiable[name] = x }
      end
    end
    name
  end
end