elixir filter from a list

filter.ex

defmodule Filter do

@moduledoc """
this module will filter out results from a list via body or tail recursion
"""

 @doc """
  this  will filter one result from the list via tail recursion
  """

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

  def reject_one([head | tail], fun, acc) do
    if fun.(head), do: acc ++ tail, else: reject_one(tail, fun, [head | acc])
  end

  @doc """
  this  will filter one result from the list via body recursion
  """

  def br_reject_one([], _fun), do: []
  def br_reject_one([head | tail], fun) do
    if fun.(head) do
      tail
    else
      [head | br_reject_one(tail, fun)]
    end
  end

end