Determining which ancestor defines a particular method

gistfile1.rb

# determining where a method was defined

module Organic
  def organic?
    true
  end
end

class Fruit
  def edible?
    true
  end
end

class OrganicApple < Fruit
  include Organic

  def color
    "red"
  end
end

apple = OrganicApple.new
puts apple.method(:color).owner # => OrganicApple
puts apple.method(:edible?).owner # => Fruit
puts apple.method(:organic?).owner # => Organic