Anagram koan

Anagram.exs

defmodule Anagram do
    @doc """
    # Anagram

    Given a word and a list of possible anagrams, selects the correct one(s).

    ## Example

        iex> Anagram.match "listen",%w(enlists google inlets banana)
        ["inlets"]

    """
    def match(word,words) do
        normalized_word = normalize_word(word)
        Enum.filter words, fn x -> normalized_word==normalize_word(x) end
    end

    defp normalize_word(word) do
        word |> String.codepoints |> Enum.sort
    end
end