Proposal: Add <&> to Data.Functor - Libraries - Haskell.org

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Proposal: Add <&> to Data.Functor

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Announcing containers 0.5.8.1

David Feuer

21 Aug 2016 21 Aug '16

1:23 p.m.

The <&> operator is rather popular: (<&>) :: Functor f => f a -> (a -> b) -> f b (<&>) = flip fmap Now that we have (&) in Data.Function, I think we should have (<&>) in Data.Functor.

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Nikita Volkov

21 Aug 21 Aug

1:52 p.m.

+1 вс, 21 Авг 2016 г., 20:23 David Feuer :

The <&> operator is rather popular:

(<&>) :: Functor f => f a -> (a -> b) -> f b (<&>) = flip fmap

Now that we have (&) in Data.Function, I think we should have (<&>) in Data.Functor. _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

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John Wiegley

3:53 p.m.

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"NV" == Nikita Volkov writes:

NV> +1 +1 -- John Wiegley GPG fingerprint = 4710 CF98 AF9B 327B B80F http://newartisans.com 60E1 46C4 BD1A 7AC1 4BA2

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evan＠evan-borden.com

7:27 p.m.

+1 for consistency On Aug 21, 2016 3:53 PM, "John Wiegley" wrote:

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"NV" == Nikita Volkov writes:

NV> +1

+1

-- John Wiegley GPG fingerprint = 4710 CF98 AF9B 327B B80F http://newartisans.com 60E1 46C4 BD1A 7AC1 4BA2 _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

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Alexander Berntsen

22 Aug 22 Aug

6:24 a.m.

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 I like symmetry and consistency -- so +1. Although I still wish we had (<|) and (|>) rather than ($) and (&). Oh well. - -- Alexander alexander@plaimi.net https://secure.plaimi.net/~alexander -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCgAGBQJXutLHAAoJENQqWdRUGk8BBzAQALjLTqdfLf6ufckUXIzNoIHK Rccv+Si9y/IWEusichUZLcr7N1uJ7uikp7wX0yhWTC5zDGI1jTYZH1QkTolQpy3T VxOqD+Knduqn2JrJoKxEi//q4aVFNvcrQa0phljo2dNNjBsGVNSFSAdwp6jF/Pp7 W8F219INjulD9xKOf5Z7Q17Xmz/1arFfwAHU6smXTpWrqSeQQ5Mm3/hfYlrLhEN6 CZTO5LCTl6ZkPSMr17RQncZlyQrMZdMk0JWCA7r5ieSjAE4KH9sCDRwDzrxUBh6j LF6jQiuz2fBTvwGa/8UK1Ff5frs+DTTNij298yvyNrUTpt6CHLQPRfu5/C6VNFPR vvgdq/NUGZ7QtCm4g1zfcjdNdApDED9FI+S8rfhUwCrF2qhiIKJagt4mnTMPAOA5 15m746h3m4NYMkMFplC3IQ9O6vG1uNebjFNzEUPqreSbereTfaAyIC11GELiFUnL QMkCpQilhY7HE045jYvVPVK/15FuurvOzkxoh6ecLrH8IBWA/jNgwF3aeIwu5Rgz aGqEyMtKZnZKtHusCLEgl+JBkOqh3Qxm/jWStNMhS3mA1wE3AdCYchS2svrVrS7u WTml70HO/bNWBZMxk794VlYVp8XAeuM7U65g6EIW0Thgtaetj+UeEVTJbD3hJhsp GkgJQMRGhaEiaCKKZrrq =NdEr -----END PGP SIGNATURE-----

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Andreas Abel

23 Aug 23 Aug

8:33 a.m.

+1. On 22.08.2016 01:27, evan@evan-borden.com wrote:

+1 for consistency

On Aug 21, 2016 3:53 PM, "John Wiegley" mailto:johnw@newartisans.com> wrote:

>>>>> "NV" == Nikita Volkov mailto:nikita.y.volkov@gmail.com> writes:

NV> +1

+1

-- John Wiegley GPG fingerprint = 4710 CF98 AF9B 327B B80F http://newartisans.com 60E1 46C4 BD1A 7AC1 4BA2 _______________________________________________ Libraries mailing list Libraries@haskell.org mailto:Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

-- Andreas Abel <>< Du bist der geliebte Mensch. Department of Computer Science and Engineering Chalmers and Gothenburg University, Sweden andreas.abel@gu.se http://www2.tcs.ifi.lmu.de/~abel/

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lennart spitzner

1 Sep 1 Sep

4:53 a.m.

infixl 1 I assume? (lens and some other libs agree on this fixity already.)

(also, +1) On 21/08/16 19:23, David Feuer wrote:

The <&> operator is rather popular:

(<&>) :: Functor f => f a -> (a -> b) -> f b (<&>) = flip fmap

Now that we have (&) in Data.Function, I think we should have (<&>) in Data.Functor.

_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

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Edward Kmett

6:53 a.m.

I'd presume we'd keep the current fixity. It plays much nicer when mixed with >>= and the like, and it doesn't mix with the <$> <*> crowd despite appearances anyways even if you give it the "obvious" fixity. -Edward On Thu, Sep 1, 2016 at 4:53 AM, lennart spitzner

wrote:

...
infixl 1 I assume? (lens and some other libs agree on this fixity already.)

(also, +1)

On 21/08/16 19:23, David Feuer wrote:

...
The <&> operator is rather popular:

(<&>) :: Functor f => f a -> (a -> b) -> f b (<&>) = flip fmap

Now that we have (&) in Data.Function, I think we should have (<&>) in Data.Functor.

_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

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participants (8)

Alexander Berntsen
Andreas Abel
David Feuer
Edward Kmett
evan＠evan-borden.com
John Wiegley
lennart spitzner
Nikita Volkov