Advent of Code day 1

gistfile1.txt

class LocationData
    attr_reader :list, :left, :right, :ordered_list

    def initialize(data)
        @list = parse(data)
        @left,@right =  @list.transpose.map { |arr| arr.map(&:to_i).sort }
        @ordered_list = [@left,@right].transpose
    end 

    def total_distance
        @ordered_list.map{ |pair| distance(*pair) }.sum
    end

    def total_similarity
        @left.map{ |x| similarity(x) }.sum
    end

    private

    def distance(x,y)
        (x - y).abs
    end

    def similarity value
        value * right_count(value)
    end

    def right_count value
        @right.tally[value] || 0
    end

    def parse data
        data.split("\n").map { |x| x.split(" ") }
    end
end

location_list = LocationData.new(DATA.read)
puts "Total Distance: #{location_list.total_distance}"
puts "Similarity Socre: #{location_list.total_similarity}"

__END__
3   4
4   3
2   5
1   3
3   9
3   3