なまえ付きひきすう風メソッドの例

gistfile1.rb

class Window

  def initialize
    @default = {
      :width => 640,
      :height => 480,
      :title => "window"
    }
  end
  
  def change element={}
    @default.update element
  end

end

win = Window.new
win.change :width => 1920, :height => 1080