Elixir version of a safe navigation operator? (navigating nil in maps/structs)

Questions & Help Questions
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23

Thanks @josevalim for sharing the idea for the below as well. This works better in our Slime partials:

  @doc """
  Save navigation for structs:

  struct_get_in user, [:address, :city]
  """
  def struct_get_in(data, key) when is_atom(key) do
    struct_get_in(data, [key])
  end
  def struct_get_in(data, keys) when is_list(keys) do
    {first, last} = Enum.split(keys, -1)
    first = Enum.map(first, &Access.key(&1, %{}))
    last  = Enum.map(last, &Access.key(&1, nil))

    get_in data, first ++ last
  end