Roulette Martingale Simulator

gistfile1.txt

class Roulette
  def initialize(bankroll, min_bet, max_bet)
    @wheel = "0-28-9-26-30-11-7-20-32-17-5-22-34-15-3-24-36-13-1-00-27-10-25-29-12-8-19-31-18-6-21-33-16-4-23-35-14-2".split("-").map(&:to_i)
    @max_index = @wheel.length - 1
    @bankroll, @min_bet, @max_bet = bankroll, min_bet, max_bet
    @bet_size = @min_bet
    @results = []
  end

  def spin_the_wheel
    @wheel[rand(@max_index)]
  end

  def reset_bet
    @bet_size = @min_bet
  end

  def double_bet
    @bet_size *= 2
  end

  def play
    until @bankroll == 0 || @bet_size > @max_bet || @bet_size > @bankroll
      result = spin_the_wheel
      if result.odd?
        @bankroll += @bet_size
        reset_bet
      else
        @bankroll -= @bet_size
        double_bet
      end
      @results << @bankroll
    end
    puts "You spun #{@results.length} times and your bankroll peaked at #{@results.max}."
  end
end

r = Roulette.new(10000, 10, 2000)
r.play