Contents

require 'yahtzee'

module Yahtzee::Scoring
  module LowerCard
    module_function

    def score_chance(dice)
      dice.reduce(:+)
    end

    def score_full_house(dice)
      sorted = dice.sort
      (sorted.count(sorted.first) + 
       sorted.count(sorted.last) == 5) ? 25 : 0
    end

    def score_small_straight(dice)
      dice.each_cons(4).any? do |a,b,c,d| 
        a+1==b && b+1==c && c+1==d
      end ? 30 : 0
    end

    def score_large_straight(dice)
      dice.each_cons(5).any? do |a,b,c,d,e| 
        a+1==b && b+1==c && c+1==d && d+1==e
      end ? 40 : 0
    end

    def score_three_of_a_kind(dice)
      score_min_of_a_kind(dice, 3)
    end

    def score_four_of_a_kind(dice)
      score_min_of_a_kind(dice, 4)
    end

    def score_yahtzee(dice)
      dice.uniq.count == 1 ? 50 : 0
    end

    def score_bonus_yahtzee(dice)
      dice.uniq.count == 1 ? 100 : 0
    end
    alias_method :score_bonus_yahtzee_1, :score_bonus_yahtzee
    alias_method :score_bonus_yahtzee_2, :score_bonus_yahtzee
    alias_method :score_bonus_yahtzee_3, :score_bonus_yahtzee

    def score_min_of_a_kind(dice, min)
      value = max_dupe_count_as_hash(dice)
      value[1] >= min ? value.reduce(:*) : 0
    end

    def dup_counts_as_hash(dice)
      dice.each_with_object(Hash.new(0)) {|o, h| h[o] += 1 }
    end

    def max_dupe_count_as_hash(dice)
      dup_counts_as_hash(dice).max_by {|_,v| v }
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
functional-yahtzee-0.0.3	lib/scoring/lower_card.rb