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Today's Topics:
1. Re: The Missing Arrow Function Strikes Back (Brent Yorgey)
2. Haskell make/ant replacement? (Kelleher, Kevin)
3. Re: Haskell make/ant replacement? (Bob Ippolito)
4. Re: Haskell make/ant replacement? (Benjamin Edwards)
5. Re: Haskell make/ant replacement? (Lyndon Maydwell)
6. Re: The Missing Arrow Function Strikes Back (Adrian May)
----------------------------------------------------------------------
Message: 1
Date: Wed, 5 Jun 2013 09:58:49 -0400
From: Brent Yorgey <[email protected]>
Subject: Re: [Haskell-beginners] The Missing Arrow Function Strikes
Back
To: [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=iso-8859-1
What are the types of 'split' and 'unsplit'? It is hard to guess what
you want just from their names.
-Brent
On Wed, Jun 05, 2013 at 01:02:40PM +0800, Adrian May wrote:
> Thanks Ertugrul. In the meantime I noticed that split and unsplit are also
> missing. Is there a similar replacement for them?
>
> Adrian.
> On 5 Jun 2013 12:57, "Ertugrul S?ylemez" <[email protected]> wrote:
>
> > Adrian May <[email protected]> wrote:
> >
> > > I just banged up against this problem:
> > >
> > >
> > http://haskell.1045720.n5.nabble.com/The-case-of-the-missing-Arrow-function-td3125388.html
> > >
> > > Was liftA2 (not the applicative one) a bad idea, or is there another
> > > way to do it, or what?
> >
> > That liftA2 (let me call it liftA2') likely has this type signature:
> >
> > liftA2' :: (Arrow cat)
> > => (b -> c -> d)
> > -> cat a b
> > -> cat a c
> > -> cat a d
> >
> > Does this sound familiar? You can write this function in terms of the
> > arrow combinators:
> >
> > liftA2' f c d = arr (uncurry f) . (c &&& d)
> >
> > However, if your arrow is also a family of applicative functors
> > (i.e. pretty much always),
> >
> > instance Applicative (MyArrow a)
> >
> > then it's probably a bad idea, because you really want to use the
> > cleaner liftA2 instead:
> >
> > liftA2 :: (Applicative f)
> > => (a -> b -> c)
> > -> f a
> > -> f b
> > -> f c
> >
> >
> > Greets,
> > Ertugrul
> >
> > --
> > Not to be or to be and (not to be or to be and (not to be or to be and
> > (not to be or to be and ... that is the list monad.
> >
> > _______________________________________________
> > Beginners mailing list
> > [email protected]
> > http://www.haskell.org/mailman/listinfo/beginners
> >
> >
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
------------------------------
Message: 2
Date: Wed, 5 Jun 2013 14:08:03 +0000
From: "Kelleher, Kevin" <[email protected]>
Subject: [Haskell-beginners] Haskell make/ant replacement?
To: "The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell" <[email protected]>
Message-ID:
<644E83C9A0C2C54A9F40341B5F63393716B6D9B5@CAMBOSEXC06.camelot.local>
Content-Type: text/plain; charset="us-ascii"
Is there a tool like "make" or "ant" that's written in Haskell?
I recall seeing something about a bit of software written in Haskell
that does dependency-checking for builds.
To be clear, I mean a tool that is generic in the sense that it
would build anything, not just code written in Haskell.
thanks,
Kevin
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Message: 3
Date: Wed, 5 Jun 2013 07:13:02 -0700
From: Bob Ippolito <[email protected]>
Subject: Re: [Haskell-beginners] Haskell make/ant replacement?
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Message-ID:
<CACwMPm-2NPa7+=dgjbvxpuuwskda-ivazktuvwtzfjt5wn_...@mail.gmail.com>
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Sounds like you're looking for Shake:
http://community.haskell.org/~ndm/shake/
On Wednesday, June 5, 2013, Kelleher, Kevin wrote:
> Is there a tool like "make" or "ant" that's written in Haskell?
>
> I recall seeing something about a bit of software written in Haskell
> that does dependency-checking for builds.
>
> To be clear, I mean a tool that is generic in the sense that it
> would build anything, not just code written in Haskell.
>
> thanks,
>
> Kevin
> This message (including any attachments) is intended only for
> the use of the individual or entity to which it is addressed and
> may contain information that is non-public, proprietary,
> privileged, confidential, and exempt from disclosure under
> applicable law or may constitute as attorney work product.
> If you are not the intended recipient, you are hereby notified
> that any use, dissemination, distribution, or copying of this
> communication is strictly prohibited. If you have received this
> communication in error, notify us immediately by telephone and
> (i) destroy this message if a facsimile or (ii) delete this message
> immediately if this is an electronic communication.
>
> Thank you.
>
>
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Message: 4
Date: Wed, 5 Jun 2013 15:13:12 +0100
From: Benjamin Edwards <[email protected]>
Subject: Re: [Haskell-beginners] Haskell make/ant replacement?
To: haskellbeginners <[email protected]>
Message-ID:
<can6k4njdz60zugpdmddrl16to55uf_3b4v1a0qyn5_jqb7t...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Look up shake. It's awesome!
Ben
On 5 Jun 2013 15:11, "Kelleher, Kevin" <[email protected]> wrote:
> Is there a tool like "make" or "ant" that's written in Haskell?
>
> I recall seeing something about a bit of software written in Haskell
> that does dependency-checking for builds.
>
> To be clear, I mean a tool that is generic in the sense that it
> would build anything, not just code written in Haskell.
>
> thanks,
>
> Kevin
> This message (including any attachments) is intended only for
> the use of the individual or entity to which it is addressed and
> may contain information that is non-public, proprietary,
> privileged, confidential, and exempt from disclosure under
> applicable law or may constitute as attorney work product.
> If you are not the intended recipient, you are hereby notified
> that any use, dissemination, distribution, or copying of this
> communication is strictly prohibited. If you have received this
> communication in error, notify us immediately by telephone and
> (i) destroy this message if a facsimile or (ii) delete this message
> immediately if this is an electronic communication.
>
> Thank you.
>
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
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Message: 5
Date: Thu, 6 Jun 2013 00:17:55 +1000
From: Lyndon Maydwell <[email protected]>
Subject: Re: [Haskell-beginners] Haskell make/ant replacement?
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Message-ID:
<cam5qztyqvmbo1jsjhmuqq3jzvwwyy2dzu3f4prk3m3qsdh2...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Shake? http://hackage.haskell.org/package/shake
Regards,
- Lyndon
On Thu, Jun 6, 2013 at 12:08 AM, Kelleher, Kevin <[email protected]>wrote:
> Is there a tool like "make" or "ant" that's written in Haskell?
>
> I recall seeing something about a bit of software written in Haskell
> that does dependency-checking for builds.
>
> To be clear, I mean a tool that is generic in the sense that it
> would build anything, not just code written in Haskell.
>
> thanks,
>
> Kevin
> This message (including any attachments) is intended only for
> the use of the individual or entity to which it is addressed and
> may contain information that is non-public, proprietary,
> privileged, confidential, and exempt from disclosure under
> applicable law or may constitute as attorney work product.
> If you are not the intended recipient, you are hereby notified
> that any use, dissemination, distribution, or copying of this
> communication is strictly prohibited. If you have received this
> communication in error, notify us immediately by telephone and
> (i) destroy this message if a facsimile or (ii) delete this message
> immediately if this is an electronic communication.
>
> Thank you.
>
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
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Message: 6
Date: Wed, 5 Jun 2013 22:46:10 +0800
From: Adrian May <[email protected]>
Subject: Re: [Haskell-beginners] The Missing Arrow Function Strikes
Back
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Message-ID:
<CAD-UbzGRurUQashicxSTcN0-GhJ-yVkHqEKi=myB5Qaq=k9...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Well I just read this:
http://www.haskell.org/haskellwiki/Arrow_tutorial
Adrian.
On 5 June 2013 21:58, Brent Yorgey <[email protected]> wrote:
> What are the types of 'split' and 'unsplit'? It is hard to guess what
> you want just from their names.
>
> -Brent
>
> On Wed, Jun 05, 2013 at 01:02:40PM +0800, Adrian May wrote:
> > Thanks Ertugrul. In the meantime I noticed that split and unsplit are
> also
> > missing. Is there a similar replacement for them?
> >
> > Adrian.
> > On 5 Jun 2013 12:57, "Ertugrul S?ylemez" <[email protected]> wrote:
> >
> > > Adrian May <[email protected]> wrote:
> > >
> > > > I just banged up against this problem:
> > > >
> > > >
> > >
> http://haskell.1045720.n5.nabble.com/The-case-of-the-missing-Arrow-function-td3125388.html
> > > >
> > > > Was liftA2 (not the applicative one) a bad idea, or is there another
> > > > way to do it, or what?
> > >
> > > That liftA2 (let me call it liftA2') likely has this type signature:
> > >
> > > liftA2' :: (Arrow cat)
> > > => (b -> c -> d)
> > > -> cat a b
> > > -> cat a c
> > > -> cat a d
> > >
> > > Does this sound familiar? You can write this function in terms of the
> > > arrow combinators:
> > >
> > > liftA2' f c d = arr (uncurry f) . (c &&& d)
> > >
> > > However, if your arrow is also a family of applicative functors
> > > (i.e. pretty much always),
> > >
> > > instance Applicative (MyArrow a)
> > >
> > > then it's probably a bad idea, because you really want to use the
> > > cleaner liftA2 instead:
> > >
> > > liftA2 :: (Applicative f)
> > > => (a -> b -> c)
> > > -> f a
> > > -> f b
> > > -> f c
> > >
> > >
> > > Greets,
> > > Ertugrul
> > >
> > > --
> > > Not to be or to be and (not to be or to be and (not to be or to be and
> > > (not to be or to be and ... that is the list monad.
> > >
> > > _______________________________________________
> > > Beginners mailing list
> > > [email protected]
> > > http://www.haskell.org/mailman/listinfo/beginners
> > >
> > >
>
> > _______________________________________________
> > Beginners mailing list
> > [email protected]
> > http://www.haskell.org/mailman/listinfo/beginners
>
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
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