Hi all,
This is probably something really obvious, but I just can't
work it out.
I borrowed (and adapted) the example from the Common Lisp Hyperspec
(http://www.lisp.org/HyperSpec/Body/fun_macroexpa_acroexpand-1.html),
as I couldn't seem to google up an example of macroexpand-1 in any
Scheme,
I'm thinking of starting a .com; probably not an especially Web 2.0
sort of one, but maybe with some Ajax involved. I seem to be more
comfortable with Lisps than anything else.
Are there any compelling reasons to choose a Lisp other than Chicken
(my current best-known) for that sort of thing?
On Wed, Feb 27, 2008 at 03:35:36PM -0300, Alex Queiroz wrote:
On Wed, Feb 27, 2008 at 2:29 PM, Robin Lee Powell
[EMAIL PROTECTED] wrote:
Are there any compelling reasons to choose a Lisp other than Chicken
(my current best-known) for that sort of thing?
If you plan to use the
Hallo,
On Wed, Feb 27, 2008 at 4:08 PM, Peter Bex [EMAIL PROTECTED] wrote:
This is no longer true according to David. He tells me he has fixed
sendfile so it will work in Windows. Or is there something else that
prevents Spiffy from working under Windows? If so, please create a
ticket
Has anyone looked into creating a DBI egg yet? I started a wiki page
with the barest outline of a proposal for one:
http://chicken.wiki.br/dbi
Let me know what you think. If someone's already got something going I'd
like to pitch in as well.
___
Alejandro Forero Cuervo scripsit:
Another thing I found useful was using what we call the pre-rendered
model: http://wiki.freaks-unidos.net/pre-rendered%20model
Somewhat more globally known as baked not fried.
http://www.reutershealth.com , which I worked on from 1999 to 2005, is
100% baked
Ozzi Lee scripsit:
Let me know what you think. If someone's already got something going I'd
like to pitch in as well.
I suggest that a row be an a-list, and that null columns be represented
by being non-existent in the a-list. If you end up preferring a plain
list or a vector, then use
On Wed, 27 Feb 2008 16:12:39 -0300
Alex Queiroz [EMAIL PROTECTED] wrote:
Hallo,
On Wed, Feb 27, 2008 at 4:08 PM, Peter Bex [EMAIL PROTECTED]
wrote:
This is no longer true according to David. He tells me he has
fixed sendfile so it will work in Windows. Or is there something
else
I suggest that a row be an a-list, and that null columns be represented
by being non-existent in the a-list. If you end up preferring a plain
list or a vector, then use (void) instead -- I am trying to get this
standardized as the Chicken representation of SQL's NULL.
I like a-lists as rows
I've been working a little in the same vein, but it's still pretty
tied to a specific project
My needs are pretty light, but I'm finding that the most useful
functions seem to be
sql:query-list
and
sql:query-alist
I started out thinking in terms of Perl/Python type DBI, but I'm
On Wed, Feb 27, 2008 at 02:40:54PM -0600, Ozzi Lee wrote:
In reality, though, I think portability between databases is more
hypothetical than real. Projects typically start with one database and
stick to it, for moving between databases *even if a portability layer
is in use* turns out to
On Wed, Feb 27, 2008 at 02:47:14PM -0600, Jeremy Sydik wrote:
I've been working a little in the same vein, but it's still pretty
tied to a specific project
My needs are pretty light, but I'm finding that the most useful
functions seem to be
sql:query-list
and
sql:query-alist
I'd
Jeremy Sydik wrote:
I've been working a little in the same vein, but it's still pretty tied
to a specific project
My needs are pretty light, but I'm finding that the most useful
functions seem to be
sql:query-list
and
sql:query-alist
I started out thinking in terms of Perl/Python type DBI,
On Wed, Feb 27, 2008 at 4:04 PM, Peter Bex [EMAIL PROTECTED] wrote:
I've tended to let null be '(), but that partly comes from liking the
look of
(null? (alist-ref 'field result)) I'm not entirely comfortable with
leaving the
value entirely absent simply because the mapping I
On Wed, Feb 27, 2008 at 4:04 PM, Peter Bex [EMAIL PROTECTED] wrote:
On Wed, Feb 27, 2008 at 02:47:14PM -0600, Jeremy Sydik wrote:
dbi:query-fold, dbi:query-map, query-for-each. I thought about
implementing these, but I
haven't been able to think of the use case that makes them
On Wed, Feb 27, 2008 at 04:23:37PM -0500, Graham Fawcett wrote:
Can you even check for void? Afaik there's no VOID? procedure.
You can; just compare with another (void) value:
(define void? (cute eq? (void) ))
That sounds rather brittle. Afaik void is defined as no value.
One possible
On 2008 Feb 27, at 10:45, Graham Fawcett wrote:
... So if you're going RDBMS,
I'd pick one database and stick with it, or help write a common dbapi
framework.
This seems a meritorious project, and not very difficult (just steal the
Python API, and Scheme-ize it). Is there any interest in
On 2/27/08, Graham Fawcett [EMAIL PROTECTED] wrote:
Personally, I don't use Spiffy; I wrote a custom framework instead.
Would you mind expanding a little on your custom framework and
whether it resides behind another webserver via mod_proxy, scgi,
fastcgi, cgi, or is itself the main webserver?
On 2008 Feb 27, at 12:11, John Cowan wrote:
In reality, though, I think portability between databases is more
hypothetical than real. Projects typically start with one database
and
stick to it, for moving between databases *even if a portability layer
is in use* turns out to be hard -- all
\begin{rant}
On the subject of using void as a return value (rather than to
indicate that
a function or method doesn't return anything), E.
Please, please, don't ever write functions that return void as
anything other
than an indication that no value was returned.
#;44 (car
Vincent Manis wrote:
\begin{rant}
On the subject of using void as a return value (rather than to indicate
that
a function or method doesn't return anything), E.
Please, please, don't ever write functions that return void as anything
other
than an indication that no value was returned.
I suggest that a row be an a-list, and that null columns be represented
by being non-existent in the a-list. If you end up preferring a plain
list or a vector, then use (void) instead -- I am trying to get this
standardized as the Chicken representation of SQL's NULL.
Is there an argument
Thinking more about it, I'm leaning MORE toward '() than before. I
also like relying
on a representation that's standard scheme rather than one that's
specifically part
of Chicken if we have the choice (and we do)
On Feb 27, 2008, at 5:29 PM, Ozzi wrote:
I suggest that a row be an a-list,
On Wed, Feb 27, 2008 at 09:29:08AM -0800, Robin Lee Powell wrote:
I'm thinking of starting a .com; probably not an especially Web
2.0 sort of one, but maybe with some Ajax involved. I seem to be
more comfortable with Lisps than anything else.
Are there any compelling reasons to choose a
On Wed, Feb 27, 2008 at 6:33 PM, Jeremy Sydik [EMAIL PROTECTED] wrote:
Thinking more about it, I'm leaning MORE toward '() than before. I
also like relying
on a representation that's standard scheme rather than one that's
specifically part
of Chicken if we have the choice (and we do)
On Wed, Feb 27, 2008 at 8:29 PM, Ozzi [EMAIL PROTECTED] wrote:
Three that I can think of:
1) It would make alist representations ugly:
(query select foo, NULL as bar, baz from stuff) =
((foo . 1) (bar) (baz . a string))
This doesn't bother me.
2) It is not a disjoint type.
Ivan Raikov wrote:
Remember that in Scheme, (define foo 'a) is a shortcut for
(define (define foo (quote a))) -- quote is a special form, and not
a part of the literal. So you in your case statement you are not
matching the symbol a, you are actually matching the symbol 'a (the
apostrophe is
Matt Gushee wrote:
isn't a syntax error? Is it because 'a expands to (quote a), and is thus
treated by case as a list of the symbols quote and a? And if so, is that
correct behavior? After all,
csi (pair? 'a)
#f
(as I expected).
[with apologies for replying to myself]
Oh, wait:
csi
Well, R5RS does not specify what happens in the second case, so you
can consider it a feature :-)
Matt Gushee [EMAIL PROTECTED] writes:
Wait a minute, though. I understand now why
(('a) ...)
didn't match, but how is it that
('a ...)
isn't a syntax error? Is it because 'a
Vincent Manis scripsit:
Please, please, don't ever write functions that return void as anything
other than an indication that no value was returned.
If no value is returned, you should use (values), which genuinely returns
no values and is distinguishable by call-with-values or any of the
Vectors are currently used in the Postgres egg to represent date-time
values. Not saying it's good, but there it is. (BTW, a dbapi needs
consistent date/time support too...)
In Common Lisp, NIL is the same as '(), and both mean false. In
Scheme we have an explicit #f. For the same reasons we
Hi!
I got a segfault error.
Sorry, I have no access to Trac right now.
Daishi
CHICKEN
Version 3.0.0 - linux-unix-gnu-x86 [ manyargs dload ptables applyhook ]
(c)2000-2008 Felix L. Winkelmanncompiled 2008-02-28 on ganglia (Linux)
#;1 (use regex)
; loading library regex ...
#;2
On 28/02/2008, Daishi Kato [EMAIL PROTECTED] wrote:
rlwrap -s 1 /usr/local/chicken-3.0.0/bin/csi
Unrelated, but why rlwrap over the readline egg?
Just curious.
Leo
___
Chicken-users mailing list
Chicken-users@nongnu.org
There was a certain reason why I use rlwrap over readline,
but I forgot what the functionality that works only with rlwrap was.
I want to control whether to use readline or not,
and I prefer rlwrap csi to csi -n.
Daishi
At Thu, 28 Feb 2008 07:18:28 +0100,
Leonardo Valeri Manera wrote:
On
On Mon, Feb 25, 2008 at 4:21 PM, Daishi Kato [EMAIL PROTECTED] wrote:
Hi,
swt should be fine if jni works well,
but it's not tested and I'm not going to maintain it.
On the other hand, I would like to continue to develop
wxchicken, which is not complete yet at all,
Ok, I'll leave
On Wed, Feb 27, 2008 at 10:31 PM, Peter Bex [EMAIL PROTECTED] wrote:
On Wed, Feb 27, 2008 at 04:23:37PM -0500, Graham Fawcett wrote:
Can you even check for void? Afaik there's no VOID? procedure.
You can; just compare with another (void) value:
(define void? (cute eq? (void) ))
On Wed, Feb 27, 2008 at 2:42 PM, Peter Wright [EMAIL PROTECTED] wrote:
Hi all,
This is probably something really obvious, but I just can't
work it out.
I borrowed (and adapted) the example from the Common Lisp Hyperspec
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