[Haskell-cafe] Is there a library that has a strict version of `sum`?
michael at snoyman.com
Wed Aug 15 06:08:04 UTC 2018
On Wed, Aug 15, 2018 at 8:40 AM Tom Ellis <
tom-lists-haskell-cafe-2017 at jaguarpaw.co.uk> wrote:
> On Tue, Aug 14, 2018 at 08:50:01PM +0200, Damian Nadales wrote:
> > On Tue, Aug 14, 2018 at 8:08 PM Bryan Richter <b at chreekat.net> wrote:
> > > On 08/14/2018 11:22 AM, Damian Nadales wrote:
> > > is there something wrong with sum in particular?
> > From the point of view of somebody that is not that bright, like myself,
> > it seems. Why would you need to build a huge thunk containing the
> > representation of a sum of values. It is not that you can pattern match
> > integers or consume the sum incrementally.
> > I apologize if I infuriate people, but I really don't get the usefulness
> > a lazy sum function.
> > > More generally, why isn't sum working for you?
> > Because if I want to test my function with 100000000 values it consumes a
> > lot of memory.
> Your rationale seems utterly reasonable and I'm surprised that you've even
> been asked to provide it. Everyone knows the problems with lazy sum. I'm
> actually astonished (and sorry) about the pushback you've received here.
> Having easy access to a sum function that doesn't blow up and *not* having
> easy access to one that does seem self evidently worthwhile.
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+1, I agree with this wholeheartedly.
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