one proposed solution to the greed.rb problem, proposed in [Ian Whitney's Ruby Brown Bag](https://github.com/IanWhitney/ruby_brownbag}, for comment — please, please comment: I'm a Ruby tyro, and could use the help. (And many thanks to Ian for his great session, and Chris Crosby-Schmidt for inspiring the approach!)

greed.rb

class Greed

  def self.score(dice)

    # initialize a score
    score = 0

    # create a hash of the roll (face values) and the number of times rolled
    rolls = dice.inject(Hash.new(0)) {|hash, roll| hash[roll] += 1; hash }

    # for each set of 1s, add 1000 points to the score
    if rolls[1]/3 > 0
      score += ( rolls[1]/3 ) * 1000 # award 1000 points per set of 1s
      rolls[1] -= ( rolls[1]/3 ) * 3 # remove each set from the roll count
    end

    # for each other set, add 100 points per set face value
    (2..6).each { |roll|
      if rolls[roll]/3 > 0
        score += ( rolls[roll]/3 ) * ( 100 * roll) # award 100 * roll per set
        rolls[roll] -= ( rolls[roll]/3 ) * 3       # remove sets from count
      end
    }

    # TODO: FIX dry violation for above two methods

    # for each (single) roll that has a pont value, award points to the score
    { 1 => 100, 5 => 50 }.each { |roll, points_per_roll|
      score += points_per_roll * rolls[roll]
    }

    # yield the score
    score

  end

end

@Dispader ... nor me :) I have not checked exercism but I have a tab open and will check it out.