rubby.rb

class Foo
  ATTRIBUTES = %i|name address|
  attr_reader *ATTRIBUTES
  
  def initialize(opts={})
    opts.keys.each do |meth|
      self.send("#{meth}=", opts.fetch(meth, nil) # Do any special things here, I suppose
    end
  end
  
  private
  attr_writer *ATTRIBUTES.map {|attr| "#{attr}=".to_sym }
end