modules-example.rb

module FormatAttributes
  def formats(*attributes)
    @format_attributes = attributes
  end

  def format_attributes
    @format_attributes
  end
end

module Formatter
  def display
    self.class.format_attributes.each do |a|
      puts "[#{a.to_s.upcase}] #{send(a)}"
    end
  end
end

class Resume
  extend FormatAttributes
  include Formatter
  attr_accessor :name, :email, :telephone
  formats :name, :email, :telephone
end

r = Resume.new

r.name      = "Rajesh"
r.email     = "rajesh.rajappan@trant.co.uk"
r.telephone = "02380 665571"

r.display