Solution for Day 04

day_04/first.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+input = File.read('./input').split("\n\n")
+
+required = %w[byr iyr eyr hgt hcl ecl pid]
+
+out = input.map do |passport|
+  required.count { |e| passport.include? e } == required.size
+end
+puts out.count(true)