AoC2020/day04/solution01.rb

#!/bin/env ruby

def valid_passport? (passport, fields)
    fields.each do |field|
        return false if !(passport.has_key?(field.to_sym))
    end
    true
end

text = File.read('./input')
passports = Hash.new
key = 0
passport = Hash.new

required_fields = [
    "byr",
    "iyr",
    "eyr",
    "hgt",
    "hcl",
    "ecl",
    "pid",
#    "cid"
]

results = {
    :valid => 0,
    :invalid => 0
}

text.each_line do |line|
    line.strip!
    if line == ''
        passports[key] = passport
        passport = Hash.new
        key += 1
        next
    end
    line.split(' ').each do |pair|
        pair = pair.split(":")
        passport[pair[0].to_sym] = pair[1]
    end
end
passports[key] = passport

passports.each_value do |passport|
    if valid_passport?(passport, required_fields)
        results[:valid] += 1
    else
        results[:invalid] += 1
    end
end

pp results