Greed Dice Game solution

Greed_game_and_score_method.rb

# Greed is a dice game where you roll up to five dice to accumulate
# points.  The following "score" function will be used to calculate the
# score of a single roll of the dice.
#
# A greed roll is scored as follows:
#
# * A set of three ones is 1000 points
#
# * A set of three numbers (other than ones) is worth 100 times the
#   number. (e.g. three fives is 500 points).
#
# * A one (that is not part of a set of three) is worth 100 points.
#
# * A five (that is not part of a set of three) is worth 50 points.
#
# * Everything else is worth 0 points.
#
#
# Examples:
#
# score([1,1,1,5,1]) => 1150 points
# score([2,3,4,6,2]) => 0 points
# score([3,4,5,3,3]) => 350 points
# score([1,5,1,2,4]) => 250 points
#
# More scoring examples are given in the tests below:
#
# Your goal is to write the score method.

def score(dice)
  score = 0
  results = Hash.new

  for x in 1..6 do 
    results[x] = []
  end

  for d in dice do
    results[d].push(d)
  end 

  for key in results.keys do
    if results[key].length >= 3
      if key == 1
        score = 1000
      else
        score = 100 * key
      end
    end
  end

  score += (results[1].length % 3) * 100
  score += (results[5].length % 3) * 50 

  return score 
end

Ah - I hadn't thought about abstracting the multiplier.

Also, I was unaware of passing multiple variables into the do sandwich. I would have a hard time remembering whether d was assigned to the (1..6) or score.

May I also mention that mutating score on each iteration seems like a Haskel thang.