Generalize indexing function

[Keith]

Sorry to spam, just realized that destroys the Map and (->) instances.

-- Keith

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On April 11, 2021 10:35:53 AM UTC, Tom Ellis <tom-lists-haskell-cafe-2017 at jaguarpaw.co.uk> wrote:
>On Sun, Apr 11, 2021 at 12:03:04PM +0200, Henning Thielemann 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.
>
>Presumably `xs !! n == fromList xs !! n`
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