Transform a list into an map with indexes using Enum module

Questions & Help Questions
1

Hi,

I need to transform a list of numbers into a map where the keys are the indexes and the values are the original values of the list. I’ve managed to do this using the following code:

  def indexed_map(list, index \\ 1, step \\ 1) do
    to_indexed_map(list, index,step, %{})
  end
  defp to_indexed_map([h|t], i, s, acc),do: to_indexed_map(t, i + s, s, Map.put(acc, i, h))
  defp to_indexed_map([], _,  _, acc), do: acc

Basically if I apply this function to

[100, 200, 300]

it will return

%{1 => 100, 2 => 200, 3 => 300}

Is there any way to the same using Elixir’s standard library? I tried Enum.map, Enum.reduce and even Enum.map_reduce but I just couldn’t figure out how to it using them.

Thanks