fizzbuzz.ex

defmodule Fizzbuzz do

  def fizzbuzz_case(num) do
    case num do
      num when rem(num, 15) == 0 -> "FizzBuzz"
      num when rem(num, 5) == 0 -> "Buzz"
      num when rem(num, 3) == 0 -> "Fizz"
      num -> num
    end
  end


  def print(to) do
    1..to
    |> Enum.into([])
    |> Enum.map(&fizzbuzz/1)
    |> Enum.join("\n")
    |> IO.puts
  end






  # Follow Elixir convention
  def fizzbuzz(num) when rem(num, 5) == 0 and rem(num, 3) == 0 do
    "Fizzbuzz"
  end

  def fizzbuzz(num) when rem(num, 3) == 0 do
    "Fizz"
  end
  def fizzbuzz(num) when rem(num, 5) == 0 do
    "Buzz"
  end
  def fizzbuzz(num) do
    num
  end






  # Recursive version
  def print_recursive(to) when to > 0 do
    fizzbuzz_recursive(to,[])
    |> Enum.join("\n")
    |> IO.puts
  end

  def fizzbuzz_recursive(_num = 0, acc) do
    acc
  end
  def fizzbuzz_recursive(num, acc) when rem(num, 5) == 0 and rem(num, 3) == 0 do
    acc = ["Fizzbuzz" | acc]
    fizzbuzz_recursive(num-1, acc)
  end
  def fizzbuzz_recursive(num, acc) when rem(num, 3) == 0 do
    acc = ["Fizz" | acc]
    fizzbuzz_recursive(num-1, acc)
  end
  def fizzbuzz_recursive(num, acc) when rem(num, 5) == 0 do
    acc = ["Buzz" | acc]
    fizzbuzz_recursive(num-1, acc)
  end
  def fizzbuzz_recursive(num, acc) do
    acc = [ num | acc ]
    fizzbuzz_recursive(num-1, acc)
  end


end