swapcaller.rb

class BasicObject
  def method_missing(method, *args)
    args[0].__send__ method, self
  end
end


p [1,2,3,4,5].include?(1) #=> true
p 1.include?([1,2,3,4,5]) #=> true
p 1.include([1,2,3,4,5])  #=> endless loop