Am Donnerstag, 27. Januar 2005 06:08 schrieb William Lee Irwin III:
Inspired by a discussion on freenode #haskell, I tried to write the
fastest Fibonacci number function possible, i.e. given a natural
number input n to compute F_n.
For the moment, mlton-generated binaries crash computing fib
On Thu, Jan 27, 2005 at 12:59:50PM -0500, S. Alexander Jacobson wrote:
I have a lot of code of the form
foo {bar = fn $ bar foo}
Is there a more concise syntax? I am thinking
the record equivalent of C's foo+=5...
you can use DrIFT to automatically create
bar_u to update a field and
Chris, I'm not sure that I understand your argument. How about this
scenario, which is what I do: Students are assigned problems, without
solutions. They are given some time to work them out and turn them in.
Then they are given the solutions, most of which I go over in class.
This does
This should have been sent to haskell-cafe...
Am 27.01.2005 um 21:28 schrieb Paul Hudak:
Chris, I'm not sure that I understand your argument. How about this
scenario, which is what I do: Students are assigned problems,
without solutions. They are given some time to work them out and
turn
Christian Hofer [EMAIL PROTECTED] writes:
That is perfectly alright with me. The problem that we are
discussing is that it would be helpful to have the solutions to the
exercises for a book that I buy for studying on my own.
How about:
1) Solve the excercises, and publish the solutions
The kind error seems fair enough. GHC looks at the class decl, and
decides that indexVal is of kind *. Then the instance declaration uses
it with kind (*-*). You may say that it should look at the instance
decl too, before deciding kinds, but the instance decl might be in
another file.
On Thu, 27 Jan 2005 16:31:21 -0500, robert dockins
[EMAIL PROTECTED] wrote:
I don't pretend to fully understand various unicode standard but it
seems to me that these problems are deeper than file path library. The
equation (decode . encode)
/= id seems confusing for me. Can you give me an
Hello,
On Fri, 28 Jan 2005 10:01:33 -0500, Jacques Carette [EMAIL PROTECTED] wrote:
The previous post on record syntax reminded me of some 'problems' I had
noticed where Haskell and mathematics have a
(deep) usage mismatch.
It is interesting that my sentiment is exactly the opposite.
John Meacham writes:
you can use DrIFT to automatically create
bar_u to update a field and
bar_s to set a field.
That is exactly what I need. Is there, by any chance, a
solution that's based on Template Haskell too? Not that I'd
have something against DrIFT; I'm just curious to know.
Henning Thielemann [EMAIL PROTECTED] wrote in article [EMAIL PROTECTED] in
gmane.comp.lang.haskell.cafe:
Over the past years I became more and more aware that common mathematical
notation is full of inaccuracies, abuses and stupidity. I wonder if
mathematical notation is subject of a
On Fri, 28 Jan 2005, Iavor Diatchki wrote:
Hello,
On Fri, 28 Jan 2005 10:01:33 -0500, Jacques Carette [EMAIL PROTECTED] wrote:
The previous post on record syntax reminded me of some 'problems' I had
noticed where Haskell and mathematics have a
(deep) usage mismatch.
It is interesting
On Fri, 28 Jan 2005, Chung-chieh Shan wrote:
Henning Thielemann [EMAIL PROTECTED] wrote in article [EMAIL PROTECTED]
in gmane.comp.lang.haskell.cafe:
Over the past years I became more and more aware that common mathematical
notation is full of inaccuracies, abuses and stupidity. I wonder
My Advanced Programming course is quickly approaching the lectures on type
classes, and I am interested in finding a little more (beyond what's in SOE)
in the way of examples that illustrate nice uses (especially of more
advanced aspects of the class system). I'd be most grateful for pointers to
Well, I don't know about modern works which might appeal to knowledge
of FP languages, but there is a well-known, 2-volume work by Cajori:
Cajori, F., A History of Mathematical Notations, The Open Court
Publishing Company, Chicago, 1929 (Available from Dover).
I know it through Ken Iverson
On 2005-01-28T20:16:59+0100, Henning Thielemann wrote:
On Fri, 28 Jan 2005, Chung-chieh Shan wrote:
But I would hesitate with some of your examples, because they may simply
illustrate that mathematical notation is a language with side effects --
see the third and fifth examples below.
I
Also, Walter Noll of Carnegie Mellon Univ. wrote a book,
Finite-Dimensional Spacesin 1987 which basically presented
undergraduate math in a notationally and conceptually unified manner.
Some of the notation and terminology was strange, but consistent.
Mike Matsko
- Original Message
I don't pretend to fully understand various unicode standard but it
seems to me that these problems are deeper than file path library. The
equation (decode . encode)
/= id seems confusing for me. Can you give me an example when this
happen?
I am pretty sure that ISO 2022 encoded strings can have
Chung-chieh Shan [EMAIL PROTECTED] writes:
O(n)
which should be O(\n - n) (a remark by Simon Thompson in
The Craft of Functional Programming)
It's a neat thought, IMHO. I usually try to quantify the variables
used, making the equivalent of 'let n = .. in
Things I'm unhappy about are for instance
f(x) \in L(\R)
where f \in L(\R) is meant
F(x) = \int f(x) \dif x
where x shouldn't be visible outside the integral
O(n)
which should be O(\n - n) (a remark by Simon Thompson in
The Craft of Functional
On Fri, Jan 28, 2005 at 08:16:59PM +0100, Henning Thielemann wrote:
But what do you mean with 1/O(n^2) ? O(f) is defined as the set of
functions bounded to the upper by f. So 1/O(f) has no meaning at the
first glance. I could interpret it as lifting (1/) to (\f x - 1 / f x)
(i.e. lifting from
[I have now subscribed to haskell-cafe]
Henning Thielemann [EMAIL PROTECTED] wrote:
This seems to be related to what I wrote yesterday
http://www.haskell.org/pipermail/haskell-cafe/2005-January/008893.html
Yes, very much. Except that rather than trying to tell mathematicians that they are
On Fri, Jan 28, 2005 at 02:36:59PM +0100, Peter Simons wrote:
you can use DrIFT to automatically create
bar_u to update a field and
bar_s to set a field.
That is exactly what I need. Is there, by any chance, a
solution that's based on Template Haskell too? Not that I'd
have something
At 9:14 PM +0100 2005/1/27, Henning Thielemann wrote:
Over the past years I became more and more aware that common mathematical
notation is full of inaccuracies, abuses and stupidity. I wonder if
mathematical notation is subject of a mathematical branch and whether
there are papers about this
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