:: [a] -> Int -> Maybe a package:relude

Safer version of !!, returns a Maybe. get element from list using index value starting from `0`.
>>> [] !!? 0
Nothing
>>> ["a", "b", "c"] !!? 3
Nothing
>>> [1, 2, 3] !!? (-1)
Nothing
>>> ["a", "b", "c"] !!? 2
Just "c"