動的にアクセサを追加

via http://rubymotion-tutorial.com/7-models/

class Hoge
  Properties = [:name, :email]
  Properties.each do |prop|
    attr_accessor prop
  end

  def initialize(hash = {})
    hash.each do |key, value|
      if Properties.member? key.to_sym
        self.send((key.to_s + '=').to_s, value)
      end
    end
  end
end

h = Hoge.new
h.name = "HogeName"
h.email = "[e-mail]"

p h.name  # => "HogeName"
p h.email # => "[e-mail]"

h = Hoge.new({name: "FugaName", email: "[e-mail]"})
p h.name  # => "FugaName"
p h.email # => "[e-mail]"