Ruby Koans Greed solution or "about_scoring_project.rb"

greed_koan.rb

# Greed is a dice game where you roll up to five dice to accumulate
# points.  The following "score" function will be used 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.

## my code
def score(dice)
  ## score is set to 0 to start off so if no dice, no score
  score = 0
  ## setting the 1000 1,1,1 rule
  score += 1000 if (dice.count(1) / 3) == 1
  ## taking care of the single 5s and 1s here
  score += (dice.count(5) % 3) * 50
  score += (dice.count(1) % 3) * 100
  ## set the other triples here
  [2, 3, 4, 5, 6].each do |num|
    score += num * 100 if (dice.count(num) / 3 ) == 1
  end
  score
end
## end my code

## all them tests
class AboutScoringProject < EdgeCase::Koan
  def test_score_of_an_empty_list_is_zero
    assert_equal 0, score([])
  end

  def test_score_of_a_single_roll_of_5_is_50
    assert_equal 50, score([5])
  end

  def test_score_of_a_single_roll_of_1_is_100
    assert_equal 100, score([1])
  end

  def test_score_of_multiple_1s_and_5s_is_the_sum_of_individual_scores
    assert_equal 300, score([1,5,5,1])
  end

  def test_score_of_single_2s_3s_4s_and_6s_are_zero
    assert_equal 0, score([2,3,4,6])
  end

  def test_score_of_a_triple_1_is_1000
    assert_equal 1000, score([1,1,1])
  end

  def test_score_of_other_triples_is_100x
    assert_equal 200, score([2,2,2])
    assert_equal 300, score([3,3,3])
    assert_equal 400, score([4,4,4])
    assert_equal 500, score([5,5,5])
    assert_equal 600, score([6,6,6])
  end

  def test_score_of_mixed_is_sum
    assert_equal 250, score([2,5,2,2,3])
    assert_equal 550, score([5,5,5,5])
  end

end

## dude. i totally scored. 

Is there a dice method or class that this piece of code plugs into?

No, dice is just the name for the number that goes in that ( ).

[right?]

Oh! Right, I just went back and read the documentation. I get the exercise now.

I was wondering if there was another component that let you play Greed on the computer, or let you use the code as a scorekeeper for a game played with actual dice. It wouldn't be too hard to build either one of those, but of course that's outside the scope of the koan.