# frozen_string_literal: true

require 'kpietrzk_palindrome/version'

module KpietrzkPalindrome

  # Returns true for a palindrome, false otherwise.
  def palindrome?
    if processed_content.empty? || processed_content.match?(/^\s*$/)
      false
    else
      processed_content == processed_content.reverse
    end
  end

  private

  # Returns content for palindrome testing.
  def processed_content
    to_s.scan(/[a-z\d]/i).join('').downcase
  end

end


class String
  include KpietrzkPalindrome

end

class Integer
  include KpietrzkPalindrome
end