Mercurial > repos > other > adventofcode2023
view day1.rb @ 24:19481b061461
Implement tilting and cycling for Day 14 part 2
Lots of false starts trying to iterate. Eventually looked for
"back in same position" to spot a loop. Then took longer to
spot that "same position" isn't necessarily "start position"
and loop can be offset!
author | IBBoard <dev@ibboard.co.uk> |
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date | Sat, 16 Dec 2023 20:39:02 +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