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- def score(dice) #dice is an array of numbers, i.e. [3,4,5,3,3]
- return 0 if(dice == [] || dice == nil)
- dice.sort!
- return 1000 + score(dice[3..-1]) if(dice[0..2] == [1,1,1])
- return 600 + score(dice[3..-1]) if(dice[0..2] == [6,6,6])
- return 500 + score(dice[3..-1]) if(dice[0..2] == [5,5,5])
- return 400 + score(dice[3..-1]) if(dice[0..2] == [4,4,4])
- return 300 + score(dice[3..-1]) if(dice[0..2] == [3,3,3])
- return 200 + score(dice[3..-1]) if(dice[0..2] == [2,2,2])
- return 100 + score(dice[1..-1]) if(dice[0] == 1)
- return 50 + score(dice[1..-1]) if(dice[0] == 5)
- return 0 + score(dice[1..-1]);
- end
- # Greed is a dice game where you roll up to five dice to accumulate
- # points. 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 fours is 400 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:
- 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_a_single_roll_of_1_is_100
- assert_equal 200, score([1,1])
- 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
- def test_score_of_a_triple_1_is_1000A
- assert_equal 1150, score([1,1,1,5,1])
- end
- def test_score_of_a_triple_1_is_1000B
- assert_equal 350, score([3,4,5,3,3])
- end
- def test_score_of_a_triple_1_is_1000C
- assert_equal 250, score([1,5,1,2,4])
- end
- end
- def score(dice)
- score = 0
- # Below is equivalent to:
- # counts = dice.inject(Hash.new(0)) { |h, x| h[x] += 1; h }
- counts = Hash.new(0)
- dice.each do |x|
- counts[x] += 1
- end
- (1..6).each do |i|
- if counts[i] >= 3
- if i == 1
- score += 1000
- else
- score += 100 * i
- end
- counts[i] = [counts[i] - 3, 0].max
- end
- if i == 1
- score += 100 * counts[i]
- elsif i == 5
- score += 50 * counts[i]
- end
- end
- score
- end
- def score dice
- dice.group_by(&:to_i).inject(0) do |score, combo|
- score + combos_score(*combo) + ones_score(*combo) + fives_score(*combo)
- end
- end
- def combos_score dice_value, dice_with_value
- number_of_bonues = [dice_with_value.size - 2, 0].max
- bonus_for(dice_value) * number_of_bonues
- end
- def bonus_for dice_value
- dice_value == 1 ? 1000 : dice_value * 100
- end
- def ones_score dice_value, dice_with_value
- return 0 if dice_value != 1 || dice_with_value.size > 2
- dice_with_value.size * 100
- end
- def fives_score dice_value, dice_with_value
- return 0 if dice_value != 5 || dice_with_value.size > 2
- dice_with_value.size * 50
- end
- def score(dice)
- totals = Hash.new(0)
- dice.each { |x| totals[x] += 1 }
- score = 0
- totals.each do |x, t|
- if t >= 3
- score += x == 1 ? 1000 : (x * 100)
- t -= 3;
- end
- if x == 1
- score += t * 100
- elsif x == 5
- score += t * 50
- end
- end
- score
- end
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