Ruby include order - from right to left

include.rb

# Include works from right to left

module X
  def self.included(base)
    puts 'include X'
  end
end

module Y
  def self.included(base)
    puts 'include Y'
  end
end

module Z
  def self.included(base)
    puts 'include Z'
  end
end

class A
  include X, Y, Z
end

=begin # output
include Z
include Y
include X
=end