62 lines
1.4 KiB
Crystal
62 lines
1.4 KiB
Crystal
INPUT = File.read("day4.txt")
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def parse_passport(string)
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new_hash = {} of String => String
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string.split(" ").each do |field|
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k,v = field.split(":")
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new_hash[k] = v
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end
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new_hash
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end
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def parse_passports(lines)
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lines.split(/\n\n/).map do |s|
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parse_passport(s.chomp.gsub(/\n/, " "))
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end
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end
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def part1
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input = INPUT.clone
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passports = parse_passports(input)
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total = passports.count do |passport|
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["byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid"].all? do |key|
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passport.has_key? key
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end
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end
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puts total
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end
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def validate_range(range)
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->(s : String) { s.to_i32?.try { |i| range.includes? i } }
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end
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def validate_regex(regex)
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->(s : String) { s.matches?(regex) }
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end
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def part2
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input = INPUT.clone
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passports = parse_passports(input)
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validators = {
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"byr" => validate_range(1920..2002),
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"iyr" => validate_range(2010..2020),
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"eyr" => validate_range(2020..2030),
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"hgt" => ->(s : String) {
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return false unless s.match(/^(\d+)(cm|in)$/)
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validate_range($~[2] == "cm" ? (150..193) : (59..76)).call($~[1])
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},
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"hcl" => validate_regex(/^#[0-9a-f]{6}$/),
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"ecl" => ->(s : String) { "amb blu brn gry grn hzl oth".split(" ").includes? s },
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"pid" => ->(s : String) { s =~ /^[0-9]{9}$/ },
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}
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total = passports.count do |passport|
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validators.all? do |k, v|
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passport[k]?.try { |s| v.call(s) }
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end
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end
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puts total
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end
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part1
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part2
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