Interface

gistfile1.rb

require "interface"
 
DuckInterface = interface {
        required_methods :walk, :swim, :quack
}

class Duck
  def walk
    puts 'Duck walks'
  end

  def swim
    puts 'Duck swims'
  end

  def quack
    puts 'Duck quacks'
  end

  implements DuckInterface
end

class PteroDuck
  def walk
    puts 'PteroDuck walks'
  end

  def swim
    puts 'PteroDuck swims'
  end

  def quack
    puts 'PteroDuck quacks'
  end

  implements DuckInterface
end