Module System.Posix.Directory of the unix package defines
getWorkingDirectory :: IO FilePath
changeWorkingDirectory :: FilePath - IO ()
I believe the functionality is quite portable and not limited to unix-like
systems. I know that e.g. Windows has chdir and getcwd. Module Filesystem of
isaac jones wrote:
Iavor and I just made the trivial modification for DoAndIfThenElse
syntax as described here:
http://hackage.haskell.org/trac/haskell-prime/wiki/DoAndIfThenElse
You can see the change here:
http://darcs.haskell.org/haskell-prime-report/report/haskell-report-html/exps.html
Andres Loeh wrote:
I cannot see how an empty list of tyvars is useful or desirable in
practice:
data Foo = Foo (forall . Int)
is equivalent to just
data Foo = Foo Int
so why bother to permit the former? It probably indicates some error in
the thinking of the programmer, so the
Malcolm Wallace wrote:
Unfortunately, I suspect that teaching is _the_ major use-case for
defaulting. Imagine, day one, lesson one, a student types
Prelude 1+2
into Hugs, and gets the response
Unresolved overloading: Num a
Huh? This is lesson one, and you already need to
Jón Fairbairn wrote:
Syntax 1, based on Phil Wadler's improvement of my old
proposal. The precedence relation is a preorder.[...]
infix {ops_1; ops_2; ...; ops_n}
The alternative syntax is exemplified thus:
infix L + - (L * / (R ^))
[...]
I think both ways (I like the second one
Henning Thielemann wrote:
1. 'if' syntax should be teached as
if a
then b
else c
This indentation makes pretty clear,
what is condition, and what is the result in both cases.
It just resembles
case a of
True - b
False - c .
The problem
On Tuesday 04 April 2006 14:55, Ross Paterson wrote:
On Tue, Apr 04, 2006 at 11:06:59AM +0400, Bulat Ziganshin wrote:
how about this old proposal?
http://www.cse.unsw.edu.au/~dons/haskell-1990-2000/msg00727.html
(Making 'deriving' a separate declaration instead of a clause)
Orphan
On Tuesday 04 April 2006 18:46, you wrote:
Benjamin Franksen wrote:
However, it would help programmers a lot, specialy library users.
And it would lift some of the burden that is currently on the
library writer to never forget to derive all possibly useful
instances for public data types
On Thursday 09 March 2006 08:59, Bulat Ziganshin wrote:
Hello Doaitse,
Thursday, March 9, 2006, 12:01:37 AM, you wrote:
DS xs `zipWith (+)` ys
i had the same desire several times
Possibly `(expr)` ?
it will be non-readable. it is better to just prohibit using of
backquotes inside
On Friday 03 March 2006 10:52, Malcolm Wallace wrote:
Marcin 'Qrczak' Kowalczyk [EMAIL PROTECTED] writes:
But if contexts-on-datatypes worked correctly,
data Set a = Ord a =
then even the real map from Data.Set:
map :: (Ord a, Ord b) = (a - b) - Set a - Set b
could be
On Friday 24 February 2006 16:38, Bulat Ziganshin wrote:
i personally prefer to have
public/private modifiers on each function and gather interface
documentation by tools like haddock
Me too.
Ben
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