Elixir example for HN post

mapify.ex

defmodule Mapify
  # This function uses a little trick matching on `%_{}` which matches only if data is a struct
  def to_map(%_{} = data) do
    container = Map.from_struct(data)

    # Elixir will destructure a map into a two-item tuple {key, value}.
    for {k, value} <- container, into: container, do: {k, to_map(value)}
  end

  # This matches `anything` it's the "catch all" for our `to_map` function
  def to_map(data) do
    data
  end
end