Elixir implementation of Trump Sort

trump_sort.exs

defmodule TrumpSort do
  def sort([h|tail]) do
    [ h | sort(tail,h) ]
  end

  def sort([], _wall) do
    []
  end

  def sort([h|tail], wall) when h > wall do
    [ h| sort(tail,h) ]
  end

  def sort([_h|tail], wall) do
    sort(tail, wall)
  end
end