Actually, vector has a sum function already: http://hackage.haskell.org/package/vector-0.12.0.1/docs/Data-Vector.html#v:sum

It's strict, and I'd guess more efficient than foldl' on lists.

On 08/14/2018 09:44 AM, Vanessa McHale wrote:

To be more explicit: unless you've actually benchmarked sum vs sum' this seems to be a premature optimization and you'd be better off just using the stock sum with a sensible data structure.

On 08/14/2018 09:40 AM, Damian Nadales wrote:

On Tue, Aug 14, 2018 at 4:25 PM Vanessa McHale <vanessa.mchale@iohk.io> wrote:

If you'd rather import a custom prelude instead of writing `sum = foldl' (+) 0` you might want to think about how dependencies affect maintaining a package.

What's the actual problem you're trying to solve?

Just add a list of values. I was expecting such a function to be already defined somewhere else.

Personally, in terms of cognitive complexity I find `sum` less complex than `fold' (+) 0`...

 

On 08/14/2018 04:09 AM, Damian Nadales wrote:

I thought the answer would be easy to find on the internet, but I cannot find any package that features a strict version of `sum`.

Do you know if such a function is defined anywhere? (like a custom prelude for instance)

I know it is trivial to define, but I would prefer not to repeat myself (and somebody else).

Thanks!

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