Snippet

advent_of_code/2022_2.rb

Code:

# Advent of Code 2022, Day 2: Rock Paper Scissors

# https://adventofcode.com/2022/day/2

require_relative './helpers.rb'

def part_one(games)
    games.map { |i, j| (j - i + 1) % 3 * 3 + j + 1 }.sum
end

def part_two(games)
    games.map { |i, j| (i + j + 2) % 3 + 1 + j * 3 }.sum
end

def solve(dataset)
    games = dataset.map { |s| s.split(' ').map { |c| %w(A B C X Y Z).index(c) % 3 } }
    return part_one(games), part_two(games)
end

puts solve(get_dataset(year: 2022, day: 2, type: 'example'))
puts solve(get_dataset(year: 2022, day: 2, type: 'input'))

Output:

15
12
12855
13726