How hard is it to implement the Racket virtual machine (no JIT) for a
single target architecture one knows?
Say, is this a one-weekend task, or a one-month task?
Neil V.
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Depends. If you count all the primitives - then one-month won't be enough.
The actual operations of the virtual machine are certainly doable in a
reasonable amount of time.
A Racket VM written in Racket:
https://github.com/soegaard/meta/blob/master/runtime/racket-eval.rkt
(submodules not
This is a homework question of mine (though I don't think the OP is
doing homework for a course for credit; I'd be curious to know where he
found it). I usually state the restrictions on 'reverse' and 'remove',
but not 'member?'. The restriction on 'reverse' is so that students
don't write one
Hello racketeers,
I'm pretty new to racket, so to get some experience with it I've been
writing a terminal emulator. It's coming along nicely (it is one
control code away from being able to nicely run vim), and is at
https://github.com/willghatch/rackterm for your browsing pleasure. I
have
Evil question: Has anybody ever looked at how the bytecode could be
interpreted on another VM e.g. JVM?
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Racket threads are not cooperative multitasking. There are no explicit
yield points. The runtime system still schedules the threads
independently, but there is only ever at most one running at a time.
Racket's threads are designed to support concurrency (ie a particular
kind of non-determinism
Le 03/06/2015 07:25, Paul Bian a écrit :
Hi all,
one function to remove duplicates from the left,
i.e. 1 2 1 3 2 4 5 - 1 2 3 4 5
and one from the right.
i.e. 1 2 1 3 2 4 5 - 1 3 2 4 5
Hello,
For the first function, I think you can't do it without a local define
or by adding a second
Thank you! The set! primitive is atomic - that's good.
Futures and Places both are interesting concepts with implementations
and documentation.
But what if I want to try my own model? Let's say, for example, tying true
parallelism to objects (by using environments, a special send and threads
in
On Wed, Jun 3, 2015 at 9:18 AM, Michael Tiedtke
michael.tied...@o2online.de wrote:
Thank you! The set! primitive is atomic - that's good.
Just to be clear: when you are using futures with set!, you get the
lower-level guarantees here, which do not include atomicity, indeed
not even SC.
Futures
In BSL:
;; -
;; [Listof X] - [Listof X]
;; remove duplicates ...
;; -
;; ... keeping the copy on the left
(require racket/base) ;; to import
Thanks for all the help guys, it really helps with my understanding.
So it seems to me there's no real easy way to do this while keeping all the
restrictions intact.
I sat here thinking about it for quite a while before posting, as I thought I
missed some simple solution, as I'm
On Tuesday, June 02, 2015 04:47:33 PM Matthew Flatt wrote:
I think you wanted `(and (=` in place of `(or (`.
That did it, thanks a lot!
Mistake on my part when I wrote it, the string-length check was added
afterwords so I used an or statement instead of an and.
Regards,
Mark
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Hello,
When I open multi frame% objects, I automaticaly have multi elements on
my desktop taskbar, but I want to have only one element. How I can proceed ?
Thanks in advance.
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Apologies for posting a solution. Since the OP had some code, I thought I'd
show him the essence .. throwing in (require racket) as the key to any
instructor who'd grade (and care that a student had cheated).
-- Matthias
On Jun 3, 2015, at 8:07 PM, Prabhakar Ragde wrote:
This is a
Il giorno 03/giu/2015, alle ore 17.04, Paul Bian ha scritto:
Thanks for all the help guys, it really helps with my understanding.
So it seems to me there's no real easy way to do this while keeping all the
restrictions intact.
I sat here thinking about it for quite a while before
I'm not a student, and haven't touched scheme since first year university in
2006. I overheard the problem discussed and wanted to give it a shot.
Essentially wondering since I couldn't do it with all the constraints, whether
I'm lacking some fundamental understanding.
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Just because no one has mentioned it yet: there is a C implementation
of the VM (and the primitives) so if you have a C compiler and an OS
for that architecture, it shouldn't be too hard.
Robby
On Wed, Jun 3, 2015 at 5:59 PM, Neil Van Dyke n...@neilvandyke.org wrote:
How hard is it to implement
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