105 lines
1.6 KiB
Ruby
105 lines
1.6 KiB
Ruby
#!/bin/env ruby
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# frozen_string_literal: true
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require 'pry'
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def score(opponent, me)
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base = case me
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when :rock
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1
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when :paper
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2
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when :scissors
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3
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end
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return 3 + base if opponent == me
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outcome = 0
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outcome = 6 if (opponent == :rock) && (me == :paper)
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outcome = 6 if (opponent == :paper) && (me == :scissors)
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outcome = 6 if (opponent == :scissors) && (me == :rock)
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outcome + base
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end
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input = File.readlines('./input').map(&:strip)
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guide = input.map do |pair|
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pair.split.map do |letter|
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case letter
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when 'A', 'X'
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:rock
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when 'B', 'Y'
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:paper
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when 'C', 'Z'
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:scissors
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end
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end
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end
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scores = guide.map do |pair|
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score(pair[0], pair[1])
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end
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puts "Part 1 Solution: #{scores.sum}"
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## Part 2
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def wins_to?(throw)
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case throw
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when :rock
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:paper
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when :paper
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:scissors
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when :scissors
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:rock
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end
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end
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def loses_to?(throw)
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case throw
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when :rock
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:scissors
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when :paper
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:rock
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when :scissors
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:paper
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end
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end
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guide2 = input.map do |pair|
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pair.split.map do |letter|
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case letter
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when 'A'
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:rock
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when 'B'
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:paper
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when 'C'
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:scissors
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when 'X'
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:lose
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when 'Y'
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:draw
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when 'Z'
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:win
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end
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end
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end
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guide2.map! do |opponent, outcome|
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throw = case outcome
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when :draw
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opponent
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when :win
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wins_to?(opponent)
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when :lose
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loses_to?(opponent)
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end
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[opponent, throw]
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end
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scores2 = guide2.map do |pair|
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score(pair[0], pair[1])
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end
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puts "Part 2 Solution: #{scores2.sum}"
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