Stochastic method definition

stochastic.rb

class BadIdea
  def self.method_added(method_name)
    return if @mid_define

    @obj ||= Object.new

    @old_methods ||= {}
    @old_methods[method_name] ||= []
    @old_methods[method_name] << self.instance_method(method_name)

    @mid_define = true
    methods = @old_methods[method_name]
    self.define_method(method_name) do |*args, **kwargs, &block|
      m = methods.sample
      m.bind_call(self, *args, **kwargs, &block)
    end
    @mid_define = false
  end

  def print; puts "a"; end
  def print; puts "b"; end
end

a = BadIdea.new
10.times { a.print }