A more generic FizzBuzz implementation

fbppb.ex

defmodule FizzBuzz do
  def fizzbuzz(words \\ [{3, "Fizz"}, {5, "Buzz"}], min \\ 1, max \\ 100) do
    min..max |> Enum.map(&_fizznum(&1, words))
  end

  def _fizznum(n, words) do
    w = words |> Enum.map(&_checkword(&1, n)) |> Enum.join("")
    case w do
      "" -> n
      _ -> w
    end
  end

  def _checkword({div, word}, n) when rem(n, div) == 0, do: word
  def _checkword(_, _n), do: ""
end