Advent of Code 2020 - Day 2 (2)

2-2.rb

array = []
valid = 0

def min(len)
  len.split('-')[0].to_i - 1
end

def max(len)
  len.split('-')[1].to_i - 1
end

File.foreach('2.txt') { |line| array << line.strip }
array.each do |pass|
  p = pass.gsub(':', '').split
  s = p[2]
  min = min(p[0])
  max = max(p[0])
  if (s[min] == (p[1]) && s[max] != (p[1])) || (s[min] != (p[1]) && s[max] == (p[1]))
    valid += 1
  end
end

print valid