use builtin conversion protocols 2

gistfile1.txt

class HeartSaver
  def initialize(you)
    @you = you
  end

  def perform_heart_surgery_from_form_input(form_input)
    cut_this_much_away_from_main_artery(form_input.to_i)
  end

  private

  def cut_this_much_away_from_main_artery(crucial_integer)
    puts "everything should go well"
  end
end

hs = HeartSaver.new('George South')
hs.perform_heart_surgery_from_form_input('yes please')