Is there a library that has a strict version of `sum`? - Haskell-Cafe - Haskell.org

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Is there a library that has a strict version of `sum`?

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Damian Nadales

14 Aug 2018 14 Aug '18

9:09 a.m.

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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Artem Pelenitsyn

14 Aug 14 Aug

10:41 a.m.

Hello Damian, If anything, I would expect this function to be called sum'. Hayoo knows just a handful of such functions, only one of which does what you want: http://hackage.haskell.org/package/combinat-0.2.8.2/docs/Math-Combinat-Helpe... This doesn't imply that there is no such function at all: the name could be different or Hayoo might have troubles to find it. -- Best, Artem On Tue, 14 Aug 2018, 12:10 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! _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

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Vanessa McHale

2:24 p.m.

New subject: Is there a library that has a strict version of `sum`?

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? 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!

_______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

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Imants Cekusins

2:38 p.m.

`sum = foldl' (+) 0`

here is another possibility with "sum" in it: Prelude Data.Monoid> let f = getSum . mconcat . (Sum <$>) Prelude Data.Monoid> f [1,2,3,4] 10 On 14 August 2018 at 17:24, Vanessa McHale 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?

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!

_______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to:http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

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David Kraeutmann

2:50 p.m.

New subject: Is there a library that has a strict version of `sum`?

That isn't strict. On 8/14/2018 4:38 PM, Imants Cekusins wrote:

...
`sum = foldl' (+) 0`

here is another possibility with "sum" in it:

Prelude Data.Monoid> let f = getSum . mconcat . (Sum <$>) Prelude Data.Monoid> f [1,2,3,4] 10

On 14 August 2018 at 17:24, Vanessa McHale mailto: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?

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!

_______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

_______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

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participants (5)

Artem Pelenitsyn
Damian Nadales
David Kraeutmann
Imants Cekusins
Vanessa McHale