Generalize indexing function

[Akhra Gannon]

Yeah, I mis-composed that. Pretty sure there's a formulation around
take/head that works but I'm clearly not in a headspace to find it!

On Sun, Apr 11, 2021, 3:03 AM Henning Thielemann <
lemming at henning-thielemann.de> wrote:

>
> On Sun, 11 Apr 2021, Akhra Gannon wrote:
>
> > It's distributive under IsList.
> > fromList (xs !! n) == (fromList xs) !! n
>
> fromList (xs !! n) ?
>
> I think, xs!!n is a single element.
>
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