unprepend_demo.rb

module Y
  def hello(str)
    puts "prepended before super"
    super(str)
    puts "prepended after super"
  end
end

class X
  def hello(str)
    puts str
  end
end

puts "-- non-prepended ---------"

x = X.new
x.hello('hi')

puts "-- prepended ------------"

X.prepend(Y)

x = X.new
x.hello('hi')


x = X.new
x.hello('hello')

puts "-- method removed -------"


Y.remove_method(:hello)

x.hello('hi')