Is it reasonable to expect that if a value can be assigned to a variable
then a predicate exists to test for that value type? So, if
(define a (if #f #f))
does not signal an error then there should be a predicate to indicate the
value associated with a is unspecified?
If the define allowed i
I did not know about HAMTs, looks interesting. It's not relevant to my use-
case, but it's an interesting topic to look into. Thanks.
On Monday, 27th August 2018 01:37:54 CEST you wrote:
> ...
> An equality test on hash tables needs to know how to compare the keys
> and how to compare the values. There's no way to pass those additional
> arguments to 'equal?', so it can't do that job.
It has to compare the values, but not the keys. If you take a look at my code,
what it does is first c
John Cowan writes:
> However, in formats like JSON where map keys are always strings,
> it can save a lot of space to represent them as symbols, since
> they are often repeated from one object to the next. There is no such
> limitation in MessagePack, although I bet strings are the most common
>
John Cowan writes:
> On Mon, Aug 27, 2018 at 12:54 AM Mark H Weaver wrote:
>
> However, in most cases, symbols are precisely what's needed to represent
> distinguished atomic objects such as this.
>
> The problem with symbols in Scheme is that they are not namespaced, so
> two different modu
I wrote:
> If he would like people to be able to write code that uses his library
> and works on multiple Scheme implementations, then it will certainly be
> an impediment to use a Racket-specific value for Nil on Racket, and a
> Guile-specific value for Nil on Guile. It would be much better to us
> On 27 Aug 2018, at 22:12, Mark H Weaver wrote:
>
> More generally, even for people only interested in supporting Guile, if
> they would like their libraries to be usable from Elisp code on Guile,
> which may become important some day if Guile-Emacs matures, then it's
> problematic to use #nil
Joshua Branson writes:
> Amirouche Boubekki writes:
>>> Is there a programming resource for
>>> userspace/kernel software
>>
>> what do you mean by kernel software?
>
> My short term goal right now is to be able to write GNU/Hurd translators
> in guile. My long term goal is to be a GNU/Hurd de
Thompson, David writes:
> without strapping them to an opinionated engine. So, Starling is going
> to be one of those opinionated engines! The core abstractions are
> inspired by Godot and Python's Cocos2D which I used many years ago;
> it's 2D only for the time being; it uses GOOPS heavily (this
Mark H Weaver writes:
> Hi Aleksandar,
> Hash table implementations typically don't offer an equality test on the
> hash tables themselves, and I don't recall anyone ever asking for such
> an operation before now.
I already wrote diff-algorithms for Python dictionaries, which is close
to implem
writes:
> On Sun, Aug 26, 2018 at 04:07:13PM -0400, Mark H Weaver wrote:
>
>> I would also avoid Guile's #nil. That is a very special value, for one
>> purpose relating to Elisp compatibility, and ideally it should not be
>> used for anything else.
>
> I must admit that I'm... pretty confused ab
l...@gnu.org (Ludovic Courtès) writes:
> I would suggesting returning zero values, using:
>
> (values)
>
> That way, if a caller wrongfully attempts to get at the return value of
> that procedure, it’ll get an error.
>
> Fibers does that in several places, and I think it’s a good convention
> as
On Mon, Aug 27, 2018 at 2:51 PM Amirouche Boubekki
wrote:
> Sorry, I don't know what is a GNU/Hurd translators.
>
It's the Hurd equivalent of a FUSE file system <
https://en.wikipedia.org/wiki/Filesystem_in_Userspace>, except that you can
mount a filesystem on any directory that you own, withou
On 2018-08-26 20:16, Joshua Branson wrote:
Amirouche Boubekki writes:
On 2018-08-25 19:16, Joshua Branson wrote:
You can play with Guile without much C knowledge and I dare to say
that you
need little of C with things like guile-bytestructures or nyacc's
ffi-helper
to use the full power
On Sun, Aug 26, 2018 at 3:12 PM, Pierre Neidhardt wrote:
>
>> I've heard about chickadee! I've tried to install it before, but I
>> haven't been successful yet. Perhaps I'll have to try again.
>
> What's the issue? Please post a backtrace.
> I can chickadee flawlessly here, maybe I can help.
I
On Mon, Aug 27, 2018 at 8:39 AM, Ludovic Courtès wrote:
> Pierre Neidhardt skribis:
>
>>> [0] https://libfive.com/studio/
>>
>> Wow, this looks awesome!
>> Is there a Guix package for the studio? :)
>
> To get started:
>
> guix environment --ad-hoc libfive -- Studio
>
> :-)
>
> Really great pac
Hi,
I would suggesting returning zero values, using:
(values)
That way, if a caller wrongfully attempts to get at the return value of
that procedure, it’ll get an error.
Fibers does that in several places, and I think it’s a good convention
as it conveys exactly what you want.
Ludo’.
Pierre Neidhardt skribis:
>> [0] https://libfive.com/studio/
>
> Wow, this looks awesome!
> Is there a Guix package for the studio? :)
To get started:
guix environment --ad-hoc libfive -- Studio
:-)
Really great package, indeed!
Ludo’.
On Mon, Aug 27, 2018 at 12:54 AM Mark H Weaver wrote:
> However, in most cases, symbols are precisely what's needed to represent
> distinguished atomic objects such as this.
>
The problem with symbols in Scheme is that they are not namespaced, so
two different modules can use the same symbols i
Hi,
HiPhish skribis:
> Hello, it's me again, the guy who wants to implement MessagePack [1] in
> Guile.
> The specification defines a type of "extension" [2], a pair of an 8-bit
> integer and a byte array for data. Implementing this type as a record is
> obvious, but what should be the name
I think I understand: it just so happens that `(if #f #f)` evaluates to
`#`, but it would still be valid if it evaluated to 5 or
"roflcopter".
> "The return value of a function that returns nothing" is a
> self-contradictory notion, if you think about it :)
I was under the impression that in Lis
pon., 27 sie 2018 o 10:17 napisał(a):
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>
> On Mon, Aug 27, 2018 at 02:17:06AM +0200, Panicz Maciej Godek wrote:
> > niedz., 26 sie 2018 o 16:09 HiPhish napisał(a):
> >
> > > Hello Schemers,
> > >
> > > I am writing an implementation of MessagePack
On Montag, 27. August 2018 02:17:06 CEST you wrote:
> In my experience, if #f doesn't make sense as a legal value, then using #f
> is probably the idiomatic Scheme way to go.
> It composes with SRFI-2's and-let* in a way similar to Haskell's Nothing
> within the "do" notation.
> I did find it usefu
Yes, this sounds like the best solution so far.
On Sonntag, 26. August 2018 23:07:26 CEST you wrote:
> The eq? predicate is able to distinguish the three. But I think using a
> singleton record is best:
>
> (define-record-type ( nil? make-nil))
> (define nil (make-nil))
>
> and thene export nji
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On Sun, Aug 26, 2018 at 04:07:13PM -0400, Mark H Weaver wrote:
[...]
> It's true that Guile historically has a special object distinct from all
> other objects, which (if #f #f) and various other expressions return,
> and which prints as "#".
>
> Ho
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On Mon, Aug 27, 2018 at 02:17:06AM +0200, Panicz Maciej Godek wrote:
> niedz., 26 sie 2018 o 16:09 HiPhish napisał(a):
>
> > Hello Schemers,
> >
> > I am writing an implementation of MessagePack [1] for Guile and a part of
> > the
> > spec is the pre
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