ruby-quiz-bowling-scores.rb

############################
# INPUT
############################

# array
rolls = "6 2 7 1 10 9 0 8 2 10 10 3 5 7 2 5 5 8 0".split(" ").map{|num| num.to_i}

############################
# PROCESS data_for_display
############################

game_data = []
frame = 1
i = 0
scores = []
score = 0

while i < rolls.size
  # strike
  if rolls[i] == 10
    score += (10 + rolls[i+1] + rolls[i+2])
    roll_1 = 10
    roll_2 = nil
    i += 1
  # spare
  elsif ((rolls[i] + rolls[i+1]) == 10)
    score += (10 + rolls[i+2])
    roll_1 = rolls[i]
    roll_2 = rolls[i+1]
    i += 2
  # regular
  else
    score += (rolls[i] + rolls[i+1])
    roll_1 = rolls[i]
    roll_2 = rolls[i+1]
    i += 2
  end

  game_data << [frame, roll_1, roll_2, score]
  frame += 1
end

############################
# FORMAT
############################

headers = ["Frame", "Roll_1", "Roll_2", "Score"]
data_for_display = game_data.unshift(headers)

def mark_strikes_with_x(frame)
  if frame[1] == 10
    frame[1] = "X"
  end
end

def nilless_frame?(frame)
  frame[1] && frame[2] != nil ? true : false
end

def spare?(frame)
  ((frame[1] + frame[2]) == 10) ? true : false
end

def mark_spares_with_slash(frame)
  if nilless_frame?(frame)
    if spare?(frame)
      frame[2] = "/"
    end
  end
end

def replace_zeros_with_dashes(frame)
  if frame[1] == 0
    frame[1] = "-"
  elsif frame[2] == 0
    frame[2] = "-"
  end
end

def frame_11?(frame)
  frame[0] == 11 ? true : false
end

def format_frame_11(frame)
  frame[0] = '*'
  frame[2] = nil
  frame[3] = nil
end

data_for_display.each do |frame|
  mark_strikes_with_x(frame)
  mark_spares_with_slash(frame)
  replace_zeros_with_dashes(frame)
  format_frame_11(frame) if frame_11?(frame)
  puts frame.map{|cell| cell.to_s.ljust(10) }.join('')
end