I’m trying to look at the docs but I couldn’t find a function that would return element with its index. Is there such a function for lists that doesn’t involve creating a new list? I want to do modify the the element if it exists and then use List.replace_at to replace it. But because I don’t have the index, I first have use Enum.find_index to get the index and then if it’s not nil, then I have to use Enum.at to get the element itself.

Edit: added code

  defp edit_if_exists(elements, id, fun) do
    case elements |> Enum.find_index(&(&1.id == id)) do
      nil ->
        elements

      idx ->
        element = elements |> Enum.at(idx); # Want to know if I can some how avoid this
        elements |> List.replace_at(idx, fun.(element))
    end
  end