bowling_scores.rb

data = ARGV.dup
name, scores = data.shift, data.map { |n| n.to_i }

# Group scores into frames
frames = scores.inject([]) do |table, score|
  previous = table.last
  frame = previous || [0]
  frame = [0] if frame.size == 3 or frame[1] == 10
  
  table << frame unless frame == previous
  frame << score
  table
end

# Calculate bonuses and total
total = 0
frames.each_with_index do |frame, i|
  f, g, x, y = frames[i+1], frames[i+2], *frame[1..2]
  frame[0] = f[1] if y and x + y == 10
  frame[0] = f[1] + (f[2] || g[1]) if x == 10
  total += frame.inject(0) { |a,b| a + b } if i < 10
  frame[3] = total
end

# Print table
puts "#{ name }'s final score: #{ total }\n\n"
puts "Frame\t\tRoll\t\tRoll\t\tScore"
frames.each_with_index do |frame, i|
  x, y, s = frame[1..3]
  first = (x == 10) ? 'X' : x
  second =  y && (y == 0 ? '-' : (x + y == 10 ? '/' : y))
  puts "#{i < 10 ? i+1 : '*'}\t\t#{first}\t\t#{second}\t\t#{s if i < 10}"
end