Having seen how recursion works in Elixir, we'll now show some examples of the abstractions that are built on top of it. We'll explore the Enum module, which contains a set of functions to work on collections. We've already seen some examples of collections in the Elixir's data types section, such as lists or maps. More generally, we can use the Enum module on collections that implement the Enumerable protocol.
We haven't yet covered protocols. We will do so in the Protocols section.
Taking the two examples from our Recursion section, let's see how they become incredibly simple to implement using the Enum module:
iex> Enum.map([2, 4, 6], &(&1 * 2))[4, 8, 12]iex> Enum.reduce([1, 2, 3], 1, &(&1 * &2))
