[Haskell-cafe] Is there a library that has a strict version of `sum`?

[Damian Nadales]

Ok, so if understood the bottom line of the answers I got from Vanessa and
Hiromi the take away seems to be: if you're prototyping then stick to the
lazy version of sum, otherwise use more advanced data structures (Vectors
or Folds).

On Tue, Aug 14, 2018 at 5:18 PM Vanessa McHale <vanessa.mchale at iohk.io>
wrote:

> 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 at 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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>
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> *Vanessa McHale*
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>
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