class Valvat::Checksum::EE

Public Instance Methods

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

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

  ((sum / 10.0).ceil * 10).to_i - sum
end