That’s all the Elixir code you need to find an anagram of a word.

anagram.ex

defmodule Anagram do
  @moduledoc """
  iex(1) > Anagram.match("dog", ["apple", "cow", "god"])
  ["god"]
  """

  @spec match(String.t(), list()) :: list()
  def match(base, candidates) when is_list(candidates) do
    base_fingerprint = fingerprint(base)

    candidates
    |> Enum.filter(&(fingerprint(&1) == base_fingerprint))
  end

  @spec fingerprint(String.t()) :: list()
  defp fingerprint(string) do
    string
    |> String.downcase()
    |> String.to_charlist()
    |> Enum.sort()
  end
end