fizzbuzz.ex

defmodule Fizzbuzz do
  def parse(range \\ 1..100) do
    range |> Enum.map(&parse_num/1) |> Enum.join
  end
  
  defp parse_num(n) do
    fizzbuzzer(n, rem(n, 3), rem(n, 5))
  end

  defp fizzbuzzer(_, 0, 0), do: "FizzBuzz"
  defp fizzbuzzer(_, 0, _), do: "Fizz"
  defp fizzbuzzer(_, _, 0), do: "Buzz"
  defp fizzbuzzer(n, _, _), do: Integer.to_string(n)
end