Advent of Code 2020 - Day 2 (1)

2-1.rb

array = []
valid = 0

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


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

print valid