class Valvat::Checksum::HU

Public Instance Methods

check_digit() click to toggle source
# File lib/valvat/checksum/hu.rb, line 6
def check_digit
  multipliers = [3, 7, 9, 1, 3, 7, 9]

  sum = sum_figures_by do |digit, index|
    digit * multipliers[index]
  end

  (10 - (sum % 10)) % 10
end