all the abstractions and obfuscations an “advanced” C++ program contains.
First and foremost, C++ should be seen as a language that enables complexity
management. The features one has grown fond of in this concept, like
operator
overloading, object orientation, automatic construction/destruction,
Note about []: Don't even mention foldl. The folding combinator
for lists is foldr, period.
Yes, I do agree. I came to this when I realized foldr gave the church
encoding of a list.
(Well, actually, due to parameters ordering:
*churchList list* z0 f = foldr f z0 list
does)
Yves Parès yves.pa...@gmail.com wrote:
Note about []: Don't even mention foldl. The folding
combinator for lists is foldr, period.
Yes, I do agree. I came to this when I realized foldr gave the church
encoding of a list.
Not only that. The foldr combinator has an identity fold and
I understand your concerns about modifying the current ideology, it's fair
enough.
Actually I'm myself more in favor of adding strict couterparts, and export
them conjointly, to support both the mathematical roots and the
performances of the operations that are done most of time (Which kind of
Dear Haskell Cafe,
I've been playing around with the -fhpc option to GHC and have come
across some things being highlighted yellow in the HTML markup for which
I can't work out the right way to 'cover' them.
A cut down program that shows what I'm talking about is at
http://hpaste.org/6
Indeed! I don't know why it wasn't obvious to me sooner.
Sorry for any confusion.
But as you say -- the main point stands.
Chris
-Original Message-
From: haskell-cafe-boun...@haskell.org
[mailto:haskell-cafe-boun...@haskell.org] On Behalf Of Brent Yorgey
Sent: 22 May 2012 03:21
To:
Hi David.
Now, if I fiddle in the .tix file by hand to fake a usage of (/=) by
changing the 52nd entry from 0 to 1, the Eq instance isn't highlighted any
more in the HTML output. More strangely, if I then remove the usage of (==)
by changing the 51st entry from 1 to 0, the Eq instance still
On 23/05/2012 11:22, Andres Löh wrote:
I've not looked at the .tix file, but a few tests seem to confirm what
I'd suspect. For derived instances, you have to cover *all* methods,
otherwise the type class will be shown as not covered.
Ok, I see. It's going to take me a while to cover all
On Tue, May 22, 2012 at 4:13 PM, John Simon zildjoh...@gmail.com wrote:
data Lexer = Lexer String
makeLexer :: String - Lexer
makeLexer fn = Lexer fn
`makeLexer` is redundant. You can simply use `Lexer`.
L.
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On Tue, Apr 24, 2012 at 7:29 PM, Gregg Lebovitz glebov...@gmail.com wrote:
On 4/23/2012 10:17 PM, Brandon Allbery wrote:
On Mon, Apr 23, 2012 at 17:16, Gregg Lebovitz glebov...@gmail.comwrote:
On 4/23/2012 3:39 PM, Brandon Allbery wrote:
The other dirty little secret that is
Hello Haskell world.
One well-known missfeature of TemplateHaskell is it's «untypedness». I
mean, that if you have say an expression (Exp or Q Exp), you do not know
it's type (does it represent String or Int or whatever). And GHC does
not know too. So, one could easily construct bad-typed
Have you already verified that stream fusion won't just do this for you?
On May 23, 2012 12:35 AM, Evan Laforge qdun...@gmail.com wrote:
So I wanted to find the first index in a vector whose running sum is
greater than a given number.
The straightforward way is to create the running sum and
On 23/05/2012 11:33, David Turner wrote:
On 23/05/2012 11:22, Andres Löh wrote:
I've not looked at the .tix file, but a few tests seem to confirm what
I'd suspect. For derived instances, you have to cover *all* methods,
otherwise the type class will be shown as not covered.
Ok, I see. It's
Dear all,
our local hackathon in Munich on the 12th of May was a real success.
Thanks to all those who joined! Look at the
site for a picture:
http://www.haskell-munich.de/dates
Our next regular meeting is on Monday, the 28th of May at Cafe Puck at
19h30. This is a holiday in Germany.
We
Rustom,
I am drafting a document that captures some of the social norms from
the comments on this list, mostly from Brandon and Wren. I have
captured the discussion about module namespace and am sorting out
the comments on the relationship between libraries and
From: Richard O'Keefe o...@cs.otago.ac.nz
Sent: Tuesday, May 22, 2012 7:59 PM
But string processing and text I/O using the java.io.* classes aren't
brilliant.
Wait just a moment - Are you comparing text I/O for C programs that process
bytes against Java programs that process double-byte
Hi Ilya,
Ilya Portnov wrote:
As far as can I see, using features of last GHC one could write typed TH
library relatively easily, and saving backwards compatibility.
For example, now we have Q monad and Exp type in template-haskell
package. Let's imagine some new package, say
From: wren ng thornton w...@freegeek.org
Sent: Tuesday, May 22, 2012 9:30 PM
-snip-
FWIW, that matches my expectations pretty well. Naive/standard Java
performing
slower than Smalltalk; highly tweaked Java using non-standard data types
performing on-par with or somewhat faster than
On 21/05/2012, at 5:33 AM, Andreas Pauley wrote:
With this in mind I've created a programming exercise where I imagine
an OO programmer would use an object hierarchy with subtype
polymorphism as part of the solution.
Being unfamiliar with git, I've submitted an AWK answer by e-mail.
I've
Welcome to issue 228 of the HWN, an issue covering crowd-sourced bits
of information about Haskell from around the web. This issue covers the
week of May 13 to 19, 2012.
Announcements
Stefan Wehr issued a call for presentations for the Commercial Users
of Functional Programmers (CUFP 2012)
exponentiation and logarithm.
So, I believe this C++ versus Haskell versus (your language of choice) is a
Penn Teller misdirection.
Whereas, another level of indirection solves everything.
--
--
Regards,
KC
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Hi, I made a cabal package that use HDBC-sqlite3 on Windows.
When cabal install it, I got an error from ld.exe: cannot find -lsqlite3.
How can I tell ld.exe where sqlite3.dll is plcaed?
Thanks.
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On Wed, May 23, 2012 at 9:47 PM, KC kc1...@gmail.com wrote:
exponentiation and logarithm.
So, I believe this C++ versus Haskell versus (your language of choice) is
a Penn Teller misdirection.
Whereas, another level of indirection solves everything.
Is it me or is this style of message —
On 05/24/2012 04:13 AM, Brandon Allbery wrote:
On Wed, May 23, 2012 at 9:47 PM, KC kc1...@gmail.com wrote:
exponentiation and logarithm.
So, I believe this C++ versus Haskell versus (your language of choice) is
a Penn Teller misdirection.
Whereas, another level of indirection solves
On Wed, May 23, 2012 at 10:19 PM, Bardur Arantsson s...@scientician.netwrote:
This has come up before -- this KC person probably has a broken mail
client which doesn't set appropriate References headers.
That, however, ignores the rest of it; the lack of references in this case
forms a
Just to play devil's advocate, if you look back at the list, KC has
written a lot of helpful and informative messages in the past.
Tom
On 5/23/12, Bardur Arantsson s...@scientician.net wrote:
On 05/24/2012 04:31 AM, Brandon Allbery wrote:
On Wed, May 23, 2012 at 10:19 PM, Bardur Arantsson
On 12-05-22 09:55 AM, Benjamin Ylvisaker wrote:
Has anyone ever worked on implementing something like this in Haskell?
http://www.cs.hmc.edu/~stone/papers/ocm-unpublished.pdf
The outline of the idea:
- Concurrent programming is really hard with the popular frameworks
today.
- For most
On 24/05/2012, at 4:39 AM, Isaac Gouy wrote:
From: Richard O'Keefe o...@cs.otago.ac.nz
Sent: Tuesday, May 22, 2012 7:59 PM
But string processing and text I/O using the java.io.* classes aren't
brilliant.
Wait just a moment - Are you comparing text I/O for C programs that process
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