Mercurial > repos > other > adventofcode2023
diff day2b.rb @ 1:49dd1ae93696
Implement day 2 with map and reduce
author | IBBoard <dev@ibboard.co.uk> |
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date | Sat, 02 Dec 2023 16:16:58 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/day2b.rb Sat Dec 02 16:16:58 2023 +0000 @@ -0,0 +1,19 @@ +#! /usr/bin/env ruby + +if ARGV.length != 1 + abort("Incorrect arguments - needs input 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| + _, all_picks = line.split(":") + sum += all_picks.split(";").map do |pick| + pick.split(",").to_h { |colour_pick| colour_pick.strip.split(" ").reverse }.transform_values(&:to_i) + end.reduce(Hash.new) {|reduced,obj| reduced.merge(obj) { |key,val1,val2| val1 > val2 ? val1 : val2 }}.values.reduce(1, :*) +end + +puts sum \ No newline at end of file