43 lines
778 B
Ruby
43 lines
778 B
Ruby
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#!/usr/bin/env ruby
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require_relative '../common'
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class Path
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attr_reader :path
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def initialize(path)
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@path = path.split(',')
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@x = @y = 0
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end
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def coordinates
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@coordinates ||= path.inject([]) do |result, move|
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direction = move[0]
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count = move[1..].to_i
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result + count.times.map { |i| move(direction) }
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end
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end
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def move(direction)
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if direction == "L"
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@x -= 1
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elsif direction == "R"
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@x += 1
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elsif direction == "D"
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@y += 1
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elsif direction == "U"
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@y -= 1
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end
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[@x, @y]
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end
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end
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def part1
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path1, path2 = Input.new(__dir__).readlines.map { |line| Path.new(line).coordinates }
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(path1 & path2).map { |coordinates| coordinates.map(&:abs).sum }.min
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end
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puts "=== Part 1 ==="
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puts part1
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