Jay,
Thanks very much for the answer.
My current thinking is that the dynamic-wind described on page 17 of Friedman's
Constraining Control may provide enough of dynamic-wind's functionality for my
needs.
It doesn't appear to have any of the forbidden constructs* of the web-server
language.
and
20 minutes ago, Gilbert Martinez wrote:
> Thanks for the advice; consistent with your recommendations and those of Mr.
> Cleis, I will re-implement this using write-bytes rather attempting to display
> a string.
>
> My working VB code required the carriage-return linefeed character in order to
> w
Thanks for the advice; consistent with your recommendations and those of
Mr. Cleis, I will re-implement this using write-bytes rather attempting to
display a string.
My working VB code required the carriage-return linefeed character in order
to work properly ( .WriteLine("V00" & vbCrLf) ). I'll a
There's no way I know of that will support dynamic-wind. In the case
of with-handlers, the problem is that with-handlers compiles to a use
of with-continuation-mark that the transformation supports, but uses a
mark key that is not serializable. In principle, dynamic-wind could
have been implemente
There are a number of things that could be going wrong, due to RS232 and
terminal device subtleties, and the OS abstractions.
Assuming that your bit rate, data bits, parity, and stop bit are
compatible, and you're using the right cable (null-modem or straight
through, and enough of the pins wi
I'm not near a Winbox, so I can't try it. Normally, though, I loop the tx to
the rx to ensure that the port can read what it writes. Looping back normally
involves little more than connecting pins 2 & 3 on the D-connector, if that is
what you are using.
I would also be wary of the terminator
Also, if you want nested iteration, use `for*'.
Vincent
At Fri, 30 Dec 2011 17:55:12 -0500,
Nadeem Abdul Hamid wrote:
>
> The for form iterates by drawing an element from each sequence; if any
> sequence is empty, then the iteration stops. So this:
>
> (for ([i (in-range 2 4)]
>[j (in-
The for form iterates by drawing an element from each sequence; if any
sequence is empty, then the iteration stops. So this:
(for ([i (in-range 2 4)]
[j (in-range 1 2)])
(printf "i = ~s j = ~s\n" i j))
produces
i = 2 j = 1
at which point, the j sequence is now empty, so the entire i
I'm noticing some unexpected behaviour with in-range:
> (for ([i (in-range 2 4)])
(printf "i = ~s\n" i))
i = 2
i = 3
that works as expected, but:
> (for ([i (in-range 2 4)]
[j (in-range 1 2)])
(printf "i = ~s\n" i))
i = 2
why isn't '3' being picked up in the second example?
Thanks,
BTW, when I say "load-balancing" here, I don't mean only between
physical hosts or virtual hosts, but also among processes on the same
multi-CPU/core physical machine.
If you are running dedicated server hardware, and you're CPU-bound, each
CPU/core can service a separately-GC'd server process
I've been experimenting with Racket v5.2 and a GW Instek 8212 meter
connected to my PC via COM1 (running WinXP SP3).
The meter responds to simple commands (e.g., "V00" terminated with a line
feed is read voltage) and I've written simple programs in Python, VB, and
even QuickBasic to query the de
Noel Welsh wrote at 12/30/2011 02:54 PM:
Yes, GC pauses get annoying when the heap gets large. This can lead to
timeouts on the client side.
FWIW, we've talked in the past about GC and Web serving in general (not
specific to the Racket Web Server; I was thinking of my SCGI library at
the
On Tue, Dec 27, 2011 at 9:26 PM, Galler wrote:
> I note that no one has discussed throwing a significant amount of physical
> memory at the problem.
>
> Empirically, is that because garbage-collection of a large heap creates its
> own performance problems?
Yes, GC pauses get annoying when the hea
FYI, C-level implementation appears to be in src\fun.c, line 7722 as
*scheme_dynamic_wind
Jay,
->dynamic-wind issue
--
The short answer is the code I'm working on is an implementation of
Harel's hierarchical state machine formalism.
I hesitate to provide a long ans
Jay,
->dynamic-wind issue
--
The short answer is the code I'm working on is an implementation of
Harel's hierarchical state machine formalism.
I hesitate to provide a long answer as I fear it would be an imposition
on your time and goodwill. Though I'm happy to provid
Matthew,
I use the MysterX COM layer of sections 2.1-2.2 for working with Microsoft's ADO
library
I have no intentions/ability to use the other sections
I would be happy to share all my ADO related code if it would be of benefit.
Racket Users list:
http://lists.r
With JM's help, it's a lot "nicer" now. ;)
A long Wufoo example is now done. Also added a plain form using most
commonly used elements.
https://github.com/racketeer/racketeering/tree/master/wufooing
I hope it minimizes Forlmets related newbie questions for the new years!
On Tue, Dec 27, 2011 at
12 hours ago, Jordan Johnson wrote:
> Hi all,
>
> Where can one find the current version of the handin server (and any
> docs for it)? (Aside from mailing list messages about solving
> problems, the most relevant thing I've found via Google search is a
> directory on pre.plt-scheme.org, which I'm
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