1796_second_largest_digit_in_a_string.rb

# frozen_string_literal: true

# https://leetcode.com/problems/second-largest-digit-in-a-string/
# @param {String} s
# @return {Integer}
def second_highest(s)
  max = -1
  result = -1
  s.each_char do |c|
    next unless c =~ /\d/

    num = c.to_i
    if num > max
      result = max
      max = num
    elsif num > result && num != max
      result = num
    end
  end

  result
end