class Valvat::Checksum::FI

Public Instance Methods

check_digit() click to toggle source
# File lib/valvat/checksum/fi.rb, line 6
def check_digit
  weight = [7, 9, 10, 5, 8, 4, 2]
  chk = 11 - figures.map do |fig|
    fig * weight.shift
  end.inject(:+).modulo(11)
  chk == 11 ? 0 : chk
end