Mercurial > repos > other > adventofcode2023
view day1.rb @ 20:fac484765bc9
Implement Day 13 mirror line finding
Walking in a loop didn't work, but consecutive pairs give a great
starting point. And there might even be a more Ruby-ish version
of the WHILE loop using zip, reverse and array ranges.
author | IBBoard <dev@ibboard.co.uk> |
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date | Wed, 13 Dec 2023 20:32:13 +0000 |
parents | 76cc43966538 |
children |
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#! /usr/bin/env ruby if ARGV.length != 1 abort("Incorrect arguments - pass a single file") elsif not File.exist? (ARGV[0]) abort ("File #{ARGV[0]} did not exist") end file = ARGV[0] sum = 0 File.open(file, "r").each_line do |line| match = /^[^0-9]*([0-9]).*?(([0-9])[^0-9]*)?$/.match(line) if match first_num = match[1].to_i second_num = match[3].nil? ? first_num : match[3].to_i sum += (first_num * 10) + second_num end end puts sum