From jk@firstlink.com.au Sat Mar 3 02:57:03 2001
Date: Sat, 3 Mar 2001 10:57:03 +0800
From: JN jk@firstlink.com.au
Subject: Haskell Hugs 98, I need WinHugs!!!!
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Hello there,
I have Hugs 98 version for DOS and well I am trying to get hold on the =
Win Hugs that my student use at University.
I am confused as I don't know wheather I should open it through Hugs =
itself or open it up through Windows. From Haskell Hugs's website, I am =
not to sure what to download, and when I downloaded the one that I =
thought was right, the ZIP file, it didd not have the setup feature I =
was looking for!!!
PLease help!!
Thanks=20
Jia
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<BODY bgColor=3D#ffffff>
<DIV><FONT color=3D#000000 size=3D2>Hello there,</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I have Hugs 98 version for DOS and =
well I am=20
trying to get hold on the Win Hugs that my student use at=20
University.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I am confused as I don't know =
wheather I should=20
open it through Hugs itself or open it up through Windows. From Haskell =
Hugs's=20
website, I am not to sure what to download, and when I downloaded the =
one that I=20
thought was right, the ZIP file, it didd not have the setup feature I =
was=20
looking for!!!</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>PLease help!!</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Thanks </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Jia</FONT></DIV></BODY></HTML>
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From nordland@cse.ogi.edu Sat Mar 3 00:49:53 2001
Date: Fri, 02 Mar 2001 16:49:53 -0800
From: Johan Nordlander nordland@cse.ogi.edu
Subject: Haskell Hugs 98, I need WinHugs!!!!
> JN wrote:
>
> Hello there,
>
> I have Hugs 98 version for DOS and well I am trying to get hold on the
> Win Hugs that my student use at University.
>
> I am confused as I don't know wheather I should open it through Hugs
> itself or open it up through Windows. From Haskell Hugs's website, I
> am not to sure what to download, and when I downloaded the one that I
> thought was right, the ZIP file, it didd not have the setup feature I
> was looking for!!!
>
> PLease help!!
>
> Thanks
>
> Jia
Hi Jia,
Maybe the download page contains too many options... Anyway, the
easiest way for you to proceed is to download
http://www.cse.ogi.edu/PacSoft/projects/Hugs/downloads/hugs98-Feb2001.msi
This Miscrosoft Installer package contains everything you need.
Good luck!
-- Johan
From tell.me.more@pobox.com Sun Mar 11 15:34:43 2001
Date: Sun, 11 Mar 2001 10:34:43 -0500
From: tell.me.more@pobox.com tell.me.more@pobox.com
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From andreas.marth@daimlerchrysler.com Mon Mar 12 18:40:21 2001
Date: Mon, 12 Mar 2001 19:40:21 +0100
From: andreas.marth@daimlerchrysler.com andreas.marth@daimlerchrysler.com
Subject: Is this a bug?
Hallo!
I just wonder why=20
map (^2*3) [1..9] returns
[1,64,729,4096,15625,46656,117649,262144,531441] .
[i^2*3|i<-[1..9]] return the expected
[3,12,27,48,75,108,147,192,243].
And so does map (\a->a^2*3) [1..9].
So why is (^2*3) not equvalent to \a->a^2*3 ?
Thanks,
Andreas=
From jf15@hermes.cam.ac.uk Mon Mar 12 18:59:11 2001
Date: Mon, 12 Mar 2001 18:59:11 +0000 (GMT)
From: Jon Fairbairn jf15@hermes.cam.ac.uk
Subject: Is this a bug?
I think so. The language grammar requires (if I read it
correctly) that the expr in an aexp of the form (op
expr) have a higher priority than op.
On Mon, 12 Mar 2001 andreas.marth@daimlerchrysler.com wrote:
> So why is (^2*3) not equvalent to \a->a^2*3 ?
Because it's being parsed as (^(2*3)) when it should be
rejected.
J=F3n
--=20
J=F3n Fairbairn Jon.Fairbairn@cl.cam.ac.uk
31 Chalmers Road jf@cl.cam.ac.uk
Cambridge CB1 3SZ +44 1223 570179 (pm only, please)
From nordland@cse.ogi.edu Tue Mar 13 19:42:39 2001
Date: Tue, 13 Mar 2001 11:42:39 -0800
From: Johan Nordlander nordland@cse.ogi.edu
Subject: Is this a bug?
Jon Fairbairn wrote:
>
> I think so. The language grammar requires (if I read it
> correctly) that the expr in an aexp of the form (op
> expr) have a higher priority than op.
>
> On Mon, 12 Mar 2001 andreas.marth@daimlerchrysler.com wrote:
> > So why is (^2*3) not equvalent to \a->a^2*3 ?
>
> Because it's being parsed as (^(2*3)) when it should be
> rejected.
>
> J=F3n
Yes, this is one of a few known and relatively insignificant differences
between Hugs 98 and the Haskell report. See further the Hugs manual,
section 9.1:
http://www.cse.ogi.edu/PacSoft/projects/Hugs/pages/hugsman/diffs.html
All the best,
Johan
From biotechinfo2007@yahoo.com Mon Mar 12 17:55:01 2001
Date: Mon, 12 Mar 2001 17:55:01
From: biotechinfo2007@yahoo.com biotechinfo2007@yahoo.com
Subject: FREE Biotech Stock Info! 78
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From Swigs@iprimus.com.au Tue Mar 13 10:25:49 2001
Date: Tue, 13 Mar 2001 18:25:49 +0800
From: Swee Guan Swigs@iprimus.com.au
Subject: HUGS98-feb2001 edition
This is a multi-part message in MIME format.
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I want to know how to install the hugs programs for windows as i cant =
seem to get it going plese inform me on how to do this.
Please send reply to swigs01@hotmail.com thank you
------=_NextPart_000_0007_01C0ABEB.076CA9C0
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4134.600" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>I want to know how to install the hugs =
programs for=20
windows as i cant seem to get it going plese inform me on how to do=20
this.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Please send reply to <A=20
href=3D"mailto:swigs01@hotmail.com">swigs01@hotmail.com</A> thank=20
you</FONT></DIV></BODY></HTML>
------=_NextPart_000_0007_01C0ABEB.076CA9C0--
From Malcolm.Wallace@cs.york.ac.uk Tue Mar 13 10:36:22 2001
Date: Tue, 13 Mar 2001 10:36:22 +0000
From: Malcolm Wallace Malcolm.Wallace@cs.york.ac.uk
Subject: Is this a bug?
Jón Fairbairn writes:
> > So why is (^2*3) not equvalent to \a->a^2*3 ?
>
> Because it's being parsed as (^(2*3)) when it should be
> rejected.
Interestingly enough, all of Hugs, nhc98, and hbc make the same
mistake. Only ghc rejects the expression, correctly complaining that
the fixities do not match.
Regards,
Malcolm
From jf15@hermes.cam.ac.uk Tue Mar 13 10:44:43 2001
Date: Tue, 13 Mar 2001 10:44:43 +0000 (GMT)
From: Jon Fairbairn jf15@hermes.cam.ac.uk
Subject: Is this a bug?
On Tue, 13 Mar 2001, Malcolm Wallace wrote:
> Interestingly enough, all of Hugs, nhc98, and hbc make the same
> mistake. Only ghc rejects the expression, correctly complaining that
> the fixities do not match.
Why is this common? The language design seems to be correct
and it's not hard to get the implementation right, surely?
J=F3n
--=20
J=F3n Fairbairn Jon.Fairbairn@cl.cam.ac.uk
31 Chalmers Road jf@cl.cam.ac.uk
Cambridge CB1 3SZ +44 1223 570179 (pm only, please)
From Malcolm.Wallace@cs.york.ac.uk Tue Mar 13 14:22:28 2001
Date: Tue, 13 Mar 2001 14:22:28 +0000
From: Malcolm Wallace Malcolm.Wallace@cs.york.ac.uk
Subject: Is this a bug?
| On Tue, 13 Mar 2001, Malcolm Wallace wrote:
| > Interestingly enough, all of Hugs, nhc98, and hbc make the same
| > mistake. Only ghc rejects the expression, correctly complaining that
| > the fixities do not match.
|
| Why is this common? The language design seems to be correct
| and it's not hard to get the implementation right, surely?
Getting infix right is one of the hardest parts of parsing Haskell.
The main difficulty arises because fixities and priorities can be
declared in the source itself (local to definitions - indeed, fixity
can be declared /after/ the use of the symbol). Most systems tend
to have a liberal parser, accepting all kinds of infix expression, then
later on, typically during renaming, they attempt to detect errors and
patch-up the expressions given the declared fixity that was in scope.
Hbc is the only system that actually changes its parsing rules
on-the-fly as it reads a fixity decl. This is one reason why it is
interesting that hbc makes the same mistake as Hugs - it shows there
is a different mechanism/assumption at work.
The mistake arises because of the operator section. After finding
the outermost operator, the system (at least in nhc98) simply treats
the whole of the rest of the expression as its argument, essentially
demoting the sectioned operator to zero priority.
Regards,
Malcolm
P.S. Now fixed in nhc98.
From andreas.marth@daimlerchrysler.com Wed Mar 14 17:17:02 2001
Date: Wed, 14 Mar 2001 18:17:02 +0100
From: andreas.marth@daimlerchrysler.com andreas.marth@daimlerchrysler.com
Subject: Observe
Hallo!
With Hugs98Feb2001 comes a module Observe.lhs (in lib/exts). Is there a=
ny=20
documentation available?
(I looked into the library documentation=20
http://www.cse.ogi.edu/PacSoft/projects/Hugs/pages/hugsman/libs.html bu=
t=20
couldn't find any.
Thanks,
Andreas=
From nordland@cse.ogi.edu Wed Mar 14 17:57:57 2001
Date: Wed, 14 Mar 2001 09:57:57 -0800
From: Johan Nordlander nordland@cse.ogi.edu
Subject: Observe
andreas.marth@daimlerchrysler.com wrote:
>
> Hallo!
>
> With Hugs98Feb2001 comes a module Observe.lhs (in lib/exts). Is there any
> documentation available?
> (I looked into the library documentation
> http://www.cse.ogi.edu/PacSoft/projects/Hugs/pages/hugsman/libs.html but
> couldn't find any.
>
> Thanks,
> Andreas
Hi Andreas,
Have a look in the release notes, which you find in the docs/ directory
in the Hugs distribution.
All the best,
Johan
From nordland@cse.ogi.edu Wed Mar 14 18:11:40 2001
Date: Wed, 14 Mar 2001 10:11:40 -0800
From: Johan Nordlander nordland@cse.ogi.edu
Subject: HUGS98-feb2001 edition
> Swee Guan wrote:
>
> I want to know how to install the hugs programs for windows as i cant
> seem to get it going plese inform me on how to do this.
>
> Please send reply to swigs01@hotmail.com thank you
Hi Swee,
Go to the Hugs download page, scroll down until you see the heading
"Special items for Win 32 platforms", and then click on the first link
that follows (hugs98-Feb2001.msi). That should start the download of a
Windows Installer package. When that file is on your hard-disk, just
double-click it and Hugs 98 will be installed. This will among other
things result in a link to Hugs 98 in your startup menu.
Good luck,
Johan
From claus.reinke@talk21.com Wed Mar 14 20:51:37 2001
Date: Wed, 14 Mar 2001 20:51:37 -0000
From: Claus Reinke claus.reinke@talk21.com
Subject: Observe
From: Johan Nordlander <nordland@cse.ogi.edu>
> andreas.marth@daimlerchrysler.com wrote:
> > With Hugs98Feb2001 comes a module Observe.lhs (in lib/exts). Is there any
> > documentation available?
> Have a look in the release notes, which you find in the docs/ directory
> in the Hugs distribution.
Or try:
The Hood homepage
www.haskell.org/hood/
Debugging Haskell by Observing Intermediate Data Structures, Andy Gill.
Haskell Workshop, Sep 2000.
http://www.cse.ogi.edu/~andy/pub/debug.htm
If you like that, you might also find GHood interesting:
http://www.cs.ukc.ac.uk/people/staff/cr3/toolbox/haskell/GHood/
Hth,
Claus
From thaeberl@bach.informatik.uni-ulm.de Mon Mar 19 10:40:43 2001
Date: Mon, 19 Mar 2001 11:40:43 +0100
From: Tobias Haeberlein thaeberl@bach.informatik.uni-ulm.de
Subject: Bug? - 'forall' in type/data - decls
Hi all!
Why doesnt Hugs (Version February 2001, run with -98 option)
accept the following?
- type A = (forall b. b -> b) -> Int
yields: "Syntax error in type expression (unexpected keyword
"forall") "
- data A = B ((forall b. b -> b) -> Int)
yields "Syntax error in type expression (unexpected `->')"
whereas ghc accepts both...
Tobi
From Swigs@iprimus.com.au Tue Mar 20 09:13:12 2001
Date: Tue, 20 Mar 2001 17:13:12 +0800
From: Swee Guan Swigs@iprimus.com.au
Subject: Hugs question
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I was suppose to find a function mid3 that takes three integers and =
returns the middle one in terms of size but i cant seem to get it.
maybe you can help
mid3 :: Int -> Int -> Int -> Int
-- mid3 takes three integers and=20
-- returns the middle one in terms of size
mid3 x y z =3D min2 x (max2 y z)
please send to swigs01@hotmail.com
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charset="iso-8859-1"
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4134.600" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>I was suppose to find a function mid3 =
that takes=20
three integers and returns the middle one in terms of size but i cant =
seem to=20
get it.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>maybe you can help</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>mid3 :: Int -> Int -> Int -> =
Int<BR>--=20
mid3 takes three integers and <BR>-- returns the middle one in terms of=20
size<BR>mid3 x y z =3D min2 x (max2 y z)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>please send to=20
swigs01@hotmail.com</FONT></DIV></BODY></HTML>
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From Swigs@iprimus.com.au Tue Mar 20 09:16:42 2001
Date: Tue, 20 Mar 2001 17:16:42 +0800
From: Swee Guan Swigs@iprimus.com.au
Subject: Fw: Hugs question
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----- Original Message -----=20
From: Swee Guan=20
To: hugs-users@haskell.org=20
Sent: Tuesday, March 20, 2001 5:13 PM
Subject: Hugs question
I was suppose to find a function mid3 that takes three integers and =
returns the middle one in terms of size but i cant seem to get it.
maybe you can help
mid3 :: Int -> Int -> Int -> Int
-- mid3 takes three integers and=20
-- returns the middle one in terms of size
mid3 x y z =3D min2 x (max2 y z)
please send to swigs01@hotmail.com
------=_NextPart_000_0009_01C0B161.889E6580
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4134.600" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV style=3D"FONT: 10pt arial">----- Original Message -----=20
<DIV style=3D"BACKGROUND: #e4e4e4; font-color: black"><B>From:</B> <A=20
title=3DSwigs@iprimus.com.au href=3D"mailto:Swigs@iprimus.com.au">Swee =
Guan</A>=20
</DIV>
<DIV><B>To:</B> <A title=3Dhugs-users@haskell.org=20
href=3D"mailto:hugs-users@haskell.org">hugs-users@haskell.org</A> </DIV>
<DIV><B>Sent:</B> Tuesday, March 20, 2001 5:13 PM</DIV>
<DIV><B>Subject:</B> Hugs question</DIV></DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I was suppose to find a function mid3 =
that takes=20
three integers and returns the middle one in terms of size but i cant =
seem to=20
get it.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>maybe you can help</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>mid3 :: Int -> Int -> Int -> =
Int<BR>--=20
mid3 takes three integers and <BR>-- returns the middle one in terms of=20
size<BR>mid3 x y z =3D min2 x (max2 y z)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>please send to <A=20
href=3D"mailto:swigs01@hotmail.com">swigs01@hotmail.com</A></FONT></DIV><=
/BODY></HTML>
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From Irfon-Kim Ahmad Tue Mar 20 12:26:23 2001
Date: Tue, 20 Mar 2001 07:26:23 -0500
From: Irfon-Kim Ahmad Irfon-Kim Ahmad
Subject: Hugs question
>I was suppose to find a function mid3 that takes three integers and returns
>the middle one in terms of size but i cant seem to get it.
>maybe you can help
>
>mid3 :: Int -> Int -> Int -> Int
>-- mid3 takes three integers and
>-- returns the middle one in terms of size
>mid3 x y z = min2 x (max2 y z)
The only problem I can see with this definition is that if you hadn't
previously defined min2 and max2, then it would fail, since these aren't in
the prelude. However, if you replace those with min and max, it seems to
work fine. I assume that you had to define min2 and max2 previous in your
exercise. Maybe you could post those definitions as well as what the problem
you're encountering is.
--
Irfon-Kim Ahmad
http://members.home.com/irfon/ahmadi/
From uk1o@rz.uni-karlsruhe.de Wed Mar 21 11:00:28 2001
Date: Wed, 21 Mar 2001 12:00:28 +0100
From: Hannah Schroeter uk1o@rz.uni-karlsruhe.de
Subject: Hugs question
Hello!
On Tue, Mar 20, 2001 at 05:13:12PM +0800, Swee Guan wrote:
> I was suppose to find a function mid3 that takes three integers and returns the middle one in terms of size but i cant seem to get it.
> maybe you can help
> mid3 :: Int -> Int -> Int -> Int
> -- mid3 takes three integers and
> -- returns the middle one in terms of size
> mid3 x y z = min2 x (max2 y z)
> please send to swigs01@hotmail.com
This is plain wrong.
1st, min2 and max2 aren't defined (use min and max from the prelude).
2nd, then, mid3 1 2 3 = min 1 (max 2 3) = min 1 3 = 1, instead
of 2. A simple implementation could be:
import List(sort)
mid3 x y z = (sort [x,y,z]) !! 1
Kind regards,
Hannah.
