gistfile1.rb

def score(dice)
  counts = (1..6).inject({}) do |counts, number|
    counts[number] = dice.count(number)
    counts
  end
  total = counts.inject(0) do |total, (number, count)|
    if count >= 3
      counts[number] -= 3
      total += (number == 1 ? 1000 : 100) * number
    end
    total
  end
  total += counts[1] * 100
  total += counts[5] * 50
end