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cvr

0.1.0

A library for validating and generating Danish CVR-numbers and P-numbers.

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cvr lib util.ex

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5 files

lib
- cvr
  
  p_number.ex
- cvr.ex
- util.ex
LICENSE.md
mix.exs

lib/util.ex

defmodule CVR.Util do
  @moduledoc false

  @doc false
  def control_digit(candidate, weights) do
    candidate
    |> Integer.digits()
    |> Enum.zip_with(weights, &Kernel.*/2)
    |> Enum.sum()
    |> Integer.mod(11)
    |> case do
      1 -> nil
      0 -> 0
      n when n < 11 -> 11 - n
    end
  end
end

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