Programming Elixir 1.6 exercise solutions - Lists and Recursion-5

[Rope-a-dope]

@pragdave

There is another error.

    if fun.(head) do
      [head | filter(tail, fun)]

  def filter([], _fun), do: []

  def filter([head | tail], fun) do
    if fun.(head) do
      [head | filter(tail, fun)]
    else
      filter(tail, fun)
    end
  end