require 'prototype'

DB = Prototype.new{
  host 'localhost'
  port 4242

  conn_string [host, port].join(':')

  def connect() p [host, port] end
}

p DB.host               #=> "localhost"
p DB.port               #=> 4242
p DB.conn_string        #=> "localhost:4242" 

DB.connect              #=> ["locahost", 4242]