contradict each other.
I am not sure how to proceed.
Opinions and suggestions are very welcome.
Thanks, Jos Koot
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abril de 2015 19:38
To: Jos Koot
Cc: racket-users@googlegroups.com
Subject: Re: [racket-users] define-language, trouble with parentheses.
Redex's term-language is about defining __abstract__ syntax not concrete
syntax.
For the former, the tricks of concrete syntax don't matter.
So let's think, how
This makes sense to me.
Thanks again, Jos
_
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com]
On Behalf Of Matthias Felleisen
Sent: sábado, 25 de abril de 2015 19:38
To: Jos Koot
Cc: racket-users@googlegroups.com
Subject: Re: [racket-users] define-language, trouble
Thanks, I take note of that.
I was mislead by the examples in the infix docs of Jens Axel Søgaard.
These examples start with #lang at-exp scheme.
Sorry, my fault.
Jos
_
From: Alexander D. Knauth [mailto:alexan...@knauth.org]
Sent: viernes, 24 de abril de 2015 12:59
To: Jos Koot
Cc: Jens
Sent: viernes, 24 de abril de 2015 18:32
To: Jos Koot
Cc: racket-users@googlegroups.com
Subject: Re: [racket-users] RE: infix notation embedded in Racket
2015-04-24 18:25 GMT+02:00 Jos Koot jos.k...@gmail.com:
Hi Jens Axel,
Thanks for replying and explaining.
Can you discriminate between
is that this is very well possible, in fact
much easier.
Thanks again, Jos
_
From: jensaxelsoega...@gmail.com [mailto:jensaxelsoega...@gmail.com] On
Behalf Of Jens Axel Søgaard
Sent: viernes, 24 de abril de 2015 14:50
To: Jos Koot
Cc: racket-users@googlegroups.com
Subject: Re: infix notation embedded
I have trouble translating the following into a define-language form:
term ::= number
term ::= number + term
An attempt like:
(define-language my-language
(term number (number + term))
does not work. It accepts (1 + (2 + 3)) and ((1 + 2) +3) but not (1 + 2 +
3).
May be there already is
de mayo de 2015 13:17
To: Jos Koot
Cc: racket-users@googlegroups.com
Subject: Re: [racket-users] constant propagation
Constant propagation is not a property of a language but its implementation.
Few implementations document which transformations they currently implement.
-- Matthias
I think Rackets's reference and guide are *very clear* about eq?, eqv? and
equal?.
They are even described well for structures and hashes and much more.
Be aware, though, that in general equality can be interpreted in many ways.
At the mathematical level equality is a difficult and in many cases
A fact is that equal? does not distinguish between for example two mutable
lists that happen to have the same content (whatever the same may mean)
They may be equal? at one moment and not be equal? a little bit later. With
eq? you don't have this problem, BUT that's a very distinct kind of
[mailto:michael.tied...@o2online.de]
Sent: lunes, 18 de mayo de 2015 21:26
To: Jos Koot; racket-users@googlegroups.com
Subject: Re: [racket-users] Strange behaviour of the eq? operator in racket
repl
snip
Maybe, I never thought about that in mathematical terms if not with the
concept
of identity. How could
, please tell me where.
Thanks to the plt Racket team!
Jos koot
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Hi
I receive e-mails from racket-users@googlegroups.com.
However, when I send an e-mail to racket-users@googlegroups.com I don't
receive my own e-mail.
Not a big problem. For the moment I include myself as CC.
Any idea how to fix this?
Thanks, Jos Koot
--
You received this message because
(try -) ; - plus; expected -
(try a) ; - plus; expected a
I did this in the definitions window of DrRacket, version 6.1.1 [3m].
Language: racket [custom]; memory limit: 2000 MB.
Thanks, Jos Koot
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You received this message because you are subscribed to the Google Groups
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Hi John Clements,
I have looked in google settings, but sofar found no option for my wish.
I had a look in google support but found nothing either.
I'll look further.
If I find somethink useful, I'll report that.
Thanks, Jos Koot
-Original Message-
From: John Clements [mailto:cleme
Thanks.
That clears it up.
Jos Koot.
-Original Message-
From: David T. Pierson [mailto:d...@mindstory.com]
Sent: viernes, 17 de abril de 2015 6:11
To: Jos Koot
Cc: racket-users@googlegroups.com
Subject: Re: [racket-users] receiving a copy of my own mails to
racket-users@googlegroups.com
, datum-syntax, quasi-syntax
and so on) are great!
Thanks again, Jos Koot
_
From: jensaxelsoega...@gmail.com [mailto:jensaxelsoega...@gmail.com] On
Behalf Of Jens Axel Søgaard
Sent: jueves, 16 de abril de 2015 17:13
To: Jos Koot
Cc: racket-users@googlegroups.com
Subject: Re: [racket-users
Quite right, I think.
3 things are important (in my experience):
Most important: the algorithm. For example I once made a fully vectorized
program for shortest paths that was much slower than a simpler
non-vectorized program, simply because my algorithm was not efficient.
Second: appropiate
line.
I would prefer the + in the last line to be highlighted.
(I am running DrRacket, version 6.1.1 [3m])
Help very much appreciated.
Wish all of you a fine easter,
Jos Koot
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with syntax-parse and (_ (~and + (~literal +)) (~literal +)).
May be I am able to make a syntax transformer, say my-syntax-case,
available in expansion-phase,
that does what you have suggested.
Thanks again,
Jos Koot
_
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com
I never used syntax-parse before. I have to look into it.
Many thanks, of course,
Jos Koot
_
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com]
On Behalf Of Alexander D. Knauth
Sent: domingo, 05 de abril de 2015 15:08
To: Jos Koot
Cc: racket-users@googlegroups.com
syntax-transformers by
runtime-procedures.
However, then literal-ids are not correctly recognized because of phase
distinction.
Question 3:
What can I do in order to debug syntax-transformers correctly, specifically
when literal-ids are involved?
Thanks, Jos Koot
--
You received this message
Hi Mathhew,
Thanks very much.
I am sorry I did not see code:line by myself.
Jos
-Original Message-
From: Matthew Flatt [mailto:mfl...@cs.utah.edu]
Sent: jueves, 04 de junio de 2015 17:01
To: Jos Koot
Cc: 'Racket-Users List'
Subject: Re: [racket-users] defform quastion
You can use
errors.
It seems like unquote-syntax, but I don't see a quasiquote-syntax.
Surely I ought to read more docs on scribble, but where?
Thanks, Jos Koot
-Original Message-
From: Matthew Flatt [ mailto:mfl...@cs.utah.edu mailto:mfl...@cs.utah.edu]
Sent: jueves, 04 de junio de 2015 17:01
To: Jos
Hi,
I have tried to use defform of scribble to describe the following:
syntax ($ infix-expr) → any
infix-expr ::= addition
addition ::= term
addition ::= addition + term
addition ::= addition - term
term ::= etc.
Using #:grammar I can easily get:
addition = term
|
as above.
Best wishes, Jos Koot
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For more options, visit https
defform of scribble/manual very well alligns the elements of #:grammar.
Every = and | is well alligned.
However, it does not align the collons of #:contract.
Not a problem, of course.
Just a matter of elegance, I think.
Best wishes, Jos Koot
BTW
The more I use scribble, the more I like
Hi to all,
margin-note of scribble no longer puts the notes in the right hand margin.
I prefer the older layout with the margin-notes at the right hand side of
the text proper.
This may be a problem for margin-notes consisting of much text.
However, I think a margin notes should always be very
To whom is interested,
https://gist.github.com/joskoot/797a9e7d2276cf59d747
A toy allowing infix notation to be embedded in Racket.
Based purely on pattern matching of syntax-case.
In many aspects differs from the infix of Jens Axel Søgaard.
I probably never shall use it, but I had much fun
Thanks to Metthew Burrerick and Gereg Henderschott for your replies.
Deleting the css files works.
I think best for me is to get accustomed to the new format.
I think uniformness of format of docs is important,
especially when putting things available for others.
Thanks again, Jos
_
#lang racket
(module a racket
(require test-engine/racket-tests)
(check-expect 1 1)
(test))
(module b racket
(require test-engine/racket-tests)
(check-expect 2 2)
(test))
(require 'a 'b)
This gives me:
Welcome to DrRacket, version 6.2.900.3--2015-05-16(e8b52f6/a) [3m].
Language:
:3).
Jos
_
From: Matthias Felleisen [mailto:matth...@ccs.neu.edu]
Sent: lunes, 25 de mayo de 2015 3:37
To: Alexander D. Knauth
Cc: Jos Koot; Racket-Users List
Subject: Re: [racket-users] test amazes me
I didn't implement test-engine but worked with Kathy to design and
occasionally add
Hi Alexander
Thanks for taking notice of my post.
Yes, it is within the *definition* that the arrows don't show up.
I apologize if my post wasn't clear.
Jos
_
From: Alexander D. Knauth [mailto:alexan...@knauth.org]
Sent: viernes, 22 de mayo de 2015 21:42
To: Jos Koot
Cc: Racket-Users
Thanks, that is minimal indeed.
Jos
-Original Message-
From: gus.ma...@gmail.com [mailto:gus.ma...@gmail.com] On Behalf Of Gustavo
Massaccesi
Sent: sábado, 23 de mayo de 2015 0:17
To: Jos Koot
Cc: Alexander D. Knauth; Racket-Users List
Subject: Re: [racket-users] disappeeraing binding
This works:
#lang racket
(define-syntax (x y) (syntax-case y () (_ (syntax (quote monkey)
x ; - monkey
This does not work
#lang racket/base
(define-syntax (x y) (syntax-case y () (_ (syntax (quote monkey)
gives the expansion time error:
syntax-case: unbound identifier in the
Thanks.
Your answer clarifies my brain.
Jos
_
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com]
On Behalf Of Alexander D. Knauth
Sent: sábado, 23 de mayo de 2015 20:06
To: Jos Koot
Cc: Racket-Users List
Subject: Re: [racket-users] racket versus racket/base
Hi Matthew,
Your proposal sounds very good to me (for what my opinion is worth). Thanks.
FWIW I give you my findings, which are positive.
I have tried the snapshot with the tests of three of my systems:
lc-with-redex (not in planet or github)
fmt (on planet)
infix (not yet in planet or github)
In
Below two versions of a very stripped version of a macro I have made.
In version 1 background expansion and check-syntax show binding arrows
within macro stx-case.
However, in version 2 the arrows are not shown.
How come?
Thanks, Jos
#lang racket
(require (for-syntax racket))
;;; version 1
to modify things such that once a module
has been instantiated, each new require of that module gives the same
instantiation?
May be there are reasons not to do so, but I do not know why not.
Your opinion would be much appreciated.
Thanks,
Jos Koot
--
You received this message because you
Thanks for the suggestion,
Jos
_
From: Alexander D. Knauth [mailto:alexan...@knauth.org]
Sent: jueves, 06 de agosto de 2015 16:55
To: Jos Koot
Cc: Racket-Users List
Subject: Re: [racket-users] Distinct instantiations of modules
I think namespace-attach-module is one way to do
: There is a lot more about testing metacircularity, but that is off topic
here.
Jos Koot
-Original Message-
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com]
On Behalf Of Neil Van Dyke
Sent: martes, 04 de agosto de 2015 19:59
To: Sean Kanaley; Alexis King
Cc
, as the example shows,
stream-lazy can be exposed by means of stream-lambda.
Best wishes, Jos Koot
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#lang racket
#| In the docs about procedure curry I read:
" A function call (curry proc v ...) is equivalent to ((curry proc) v ...).
In other words, curry itself is curried. "
This means: |#
((curry list)) ; -> #
#| where I would prefer:
((curry list)) ; -> ()
To me the following
#lang racket
(require math/base)
(define-syntax-rule (tst x ...)
(begin
(let ((y (string->number 'x)))
(printf "~a ~s ~s ~s~n" 'x y (atanh y) (real? y))) ...))
(tst
"-2"
"-2+0i"
"-2+0.0i"
"-2.0"
"-2.0+0i"
"-2.0+0.0i")
Produces
-2 -2 +nan.0 #t
-2+0i -2 +nan.0 #t
-2+0.0i -2.0+0.0i
Yes, notepad is strange. Why not use wordpad?
Jos
-Original Message-
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com]
On Behalf Of Josh English
Sent: martes, 06 de octubre de 2015 6:06
To: Racket Users
Subject: [racket-users] Re: Writing text to a file with
again,
Jos
_
From: jensaxelsoega...@gmail.com [mailto:jensaxelsoega...@gmail.com] On
Behalf Of Jens Axel Søgaard
Sent: jueves, 27 de agosto de 2015 17:35
To: Jos Koot
Cc: Racket-Users List
Subject: Re: [racket-users] namespace-undefine-variable! question
The issue here is whether
The following works:
#lang racket/base
#;1 (define ns (make-base-namespace))
#;2 (namespace-variable-value 'list #t (λ () 'not-found) ns)
; - #procedure:print-syntax-width
#;3 (namespace-set-variable-value! 'list 'whatever (λ () #f) ns)
#;4 (namespace-undefine-variable! 'list ns)
#;5
.
Thanks for your comment, Jos
_
From: Deren Dohoda [mailto:deren.doh...@gmail.com]
Sent: jueves, 27 de agosto de 2015 20:19
To: Jos Koot
Cc: Jens Axel Søgaard; Racket-Users List
Subject: Re: [racket-users] namespace-undefine-variable! question
Hi Jos,
But some of them I want to undefine
1 0 #f
(list (cons prop:custom-write printer
((name) (make-struct-field-accessor acc 0 'name)))
(constr 'y)) ; -> #
n ; -> 2
;Done with
;DrRacket, version 6.2.0.5--2015-07-06(d6fa581/a) [3m].
;Language: racket [custom]; memory limit: 2000 MB.
Best wishes, Jos Koot
--
You receive
Thanks for the answer, rapid as always.
Jos
-Original Message-
From: Matthew Flatt [mailto:mfl...@cs.utah.edu]
Sent: miércoles, 02 de septiembre de 2015 2:11
To: Jos Koot
Cc: 'racket users'; jos.k...@gmail.com
Subject: Re: [racket-users] custom-print called twice?
The first call
to namespace-undefine-
variable!.
Thanks again, Jos
_
From: jensaxelsoega...@gmail.com [mailto:jensaxelsoega...@gmail.com] On
Behalf Of Jens Axel Søgaard
Sent: viernes, 28 de agosto de 2015 13:48
To: Jos Koot
Cc: Racket-Users List
Subject: Re: [racket-users] namespace-undefine-variable
Jon and Jon,
Both thanks for your replies.
I'll stick to call-in-nested-thread.
Jos
_
From: Jon Zeppieri [mailto:zeppi...@gmail.com]
Sent: miércoles, 13 de enero de 2016 6:03
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] Calling a procedure without allowing it to
permanently
#|
Hi,
Consider a procedure, say protected-caller,
that accepts a thunk and calls it,
but does not want any parameter or handler to be altered by the thunk.
Of course the called thunk can alter parameters and handlers for its own
use,
but I want all parameters and handlers reset after return from
Your suggestion works,
but only for explicitly parameterized parameters.
There may be parameters that I don't know of,
but nevertheless may affect my protected-caller.
Therefore I want ALL parameters protected.
Thanks, Jos
-Original Message-
From: racket-users@googlegroups.com
Hi,
Scribble gives me much pleasure.
Nevertheless, sometimes it takes me much time to find
the appropriate documentation on things I want to do.
Probably due to my ignorance.
For example, it took me about half an hour
of looking up the docs and making trials and errors
to make my own *red*
No, I did not mention that option, but it has crossed my mind.
At this moment I am reading Julia Lawall's notion of “leakage”.
Thanks, Jos.
_
From: Matthias Felleisen [mailto:matth...@ccs.neu.edu]
Sent: sábado, 28 de mayo de 2016 14:56
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket
[mailto:matth...@ccs.neu.edu]
Sent: viernes, 27 de mayo de 2016 1:24
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] check-duplicates
You can add a keyword argument that changes the not-found result for such a
case:
(define special (gensym))
(check-duplicates+ '(#f #f) #:not-found special)
Its
Thanks Matthias,
I found the source by means of 'open defining file'.
Brought me instantly to the definition.
I did not need a pull request on github.
Thanks,
Jos
-Original Message-
From: Matthias Felleisen [mailto:matth...@ccs.neu.edu]
Sent: viernes, 27 de mayo de 2016 19:42
To: Jos
Hi,
(member #f '(#f)) -> (#f)
(member #f '(#t)) -> #f
Nice and clear, but:
(check-duplicates '(#f #f)) -> #f
(check-duplicates '(#f #t)) -> #f
check-duplicates gives no clear answer when #f is duplicated.
I propose to modify check-duplicates such as to make a distinction between
,
Jos
-Original Message-
From: Brian LaChance [mailto:blach...@ccs.neu.edu]
Sent: jueves, 16 de junio de 2016 17:10
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] scribble question about making my own types
On Tue, Jun 14, 2016 at 1:17 PM, Jos Koot <jos.k...@gmail.com>
the docs without
finding it again.
If you understand what I mean, can you tell me where to look in the docs?
It is there, for I saw it before.
Thanks,
Jos Koot
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Hi,
Trying to check spelling in DrRacket for a scrbl document, I get the message
that aspell or ispell cannot be found. Where can I find it? How to install
it?
I work with Windows 7.
Thanks, Jos
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14:32
To: Jos Koot; Lehi Toskin; Racket Users
Subject: Re: [racket-users] Re: ispell
Lyx FTP site for Aspell for Windows
<ftp://ftp.lyx.org/pub/lyx/contrib/aspell6-windows/>
sorry pasting the shortcut did work
ftp://ftp.lyx.org/pub/lyx/contrib/aspell6-windows/
(use 'guest')
I unfortunately
Thanks,
I tried to download the english dictionary, but my computer can't run the
.exe file.
Jos
-Original Message-
From: racket-users@googlegroups.com [mailto:racket-users@googlegroups.com]
On Behalf Of Lehi Toskin
Sent: viernes, 26 de febrero de 2016 0:30
To: Racket Users
Subject:
ly use the 64 bit version)
Thanks for your help.
Jos
_
From: Stephen De Gabrielle [mailto:spdegabrie...@gmail.com]
Sent: viernes, 26 de febrero de 2016 18:15
To: Jos Koot; Lehi Toskin; Racket Users
Subject: Re: [racket-users] Re: ispell
It's been a while but I believe the Windows inst
I have:
@defproc[(fmt
(format (or/c string? fmt?)) ...
(port
(or/c output-port?
'string 'str
'current 'cur
'argument 'arg) 'string)
(and/c procedure? fmt?)]{bla bla bla}
in a scrbl file, where 'bla bla
y weak spots in poor code.
My 2 cents, Jos Koot
-Original Message-
From: racket-users@googlegroups.com [ <mailto:racket-users@googlegroups.com>
mailto:racket-users@googlegroups.com] On Behalf Of Neil Van Dyke
Sent: domingo, 14 de febrero de 2016 15:26
To: Saša Janiška;
Do you mean the following?
(define (a)
(case (random 6)
[(0) (string-append "P" "→" (a))]
[(1) (string-append "R" "↔" (a))]
[(2) (string-append "T" "∧" (a))]
[(3) (string-append "Z" "⊕" (a))]
[(4) (string-append "S" "q" (a))]
[(5) "" ]))
Jos
-Original Message-
The following surprises me:
> (seconds->date (sub1 (expt 2 40)))
seconds->date: integer is out-of-range
integer: 1099511627775
Nevertheless I can go further on in time:
> (seconds->date (sub1 (expt 2 50)))
#(struct:date*
40
5
11
23
9
22520
1
266
#t
7200
0
"Romance
tly) 35680317?
Jos
_
From: Jon Zeppieri [mailto:zeppi...@gmail.com]
Sent: viernes, 19 de febrero de 2016 23:31
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] second->date
I'm not especially familiar with the code in question, but it looks to me
like some time-handling code
Ir works fine.
I must have overlooked something in the docs.
Thanks again.
Jos
_
From: Scott Moore [mailto:sc...@thinkmoore.net] On Behalf Of Scott Moore
Sent: miércoles, 16 de marzo de 2016 18:05
To: Jos Koot; Racket Users
Cc: Jos Koot
Subject: Re: [racket-users] dynamic-require
Consider (define/memoized (a b c d) form0 form1 form2)
. body allows the body to consist of more than one form.
Without the dot, syntax define/memoized would accept bodies of one form
only,
that is (define/memoized (a b c d) form0) would match, but
(define/memoized (a b c d) form0 form1 form2)
)),
because only rows (or cullums) are considered, not all N^2 squares of the
board.
Jos
-Original Message-
From: Brian Adkins [mailto:lojicdot...@gmail.com]
Sent: sábado, 12 de marzo de 2016 23:33
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] Sequential vs. Parallel 13-Queens
I have looked up a N-queens program I made a long time ago. It finds all
solutions.
My timings are faster I think. I need 2 seconds (in DrRacket) for N=12.
14200 solutions of which 1787 are not symmetrically equivalent.
If you want I send you the code privately. 83 lines.
Finding the solutions
The following does not work in the definitions window of DrRacket:
#lang racket
(module a racket (display "hello"))
(module b racket (require 'a))
(module c racket (require 'b))
(require 'c)
But when putting it in the interactions-window (without the #lang line),
it works.
After reading the
See https://en.wikipedia.org/wiki/Eight_queens_puzzle
For a non recursive non-back-tracking algorithm.
It is a loop that (when using a vector) can easily be unrolled in parallelly
executed loops.
I implemented it as follows running on 2 processors:
#lang racket
#|
The following text is copied
symmetrical problems.
Best wishes, Jos
-Original Message-
From: Brian Adkins [mailto:lojicdot...@gmail.com]
Sent: sábado, 12 de marzo de 2016 23:33
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] Sequential vs. Parallel 13-Queens program
The code is a little difficult for me
symmetrical problems.
Best wishes, Jos
-Original Message-
From: Brian Adkins [mailto:lojicdot...@gmail.com]
Sent: sábado, 12 de marzo de 2016 23:33
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] Sequential vs. Parallel 13-Queens program
The code is a little difficult for me
Hi,
The following example of dynamic-require in the reference manual works in
the interactions window of DrRacket, but not in its definitions window:
(module a racket/base (displayln "hello"))
(dynamic-require ''a #f)
How do I do this in the definitions window?
The reason I use
Thanks very much.
I'll try that.
I wonder what happens when I already have a file test.rkt in the current
directory,
but I'll find out.
Thanks again, Jos.
_
From: Scott Moore [mailto:sc...@thinkmoore.net]
Sent: miércoles, 16 de marzo de 2016 18:03
To: Jos Koot; Racket Users
Cc: Jos Koot
Oops, forgot to include the users list.
_
From: Jos Koot [mailto:jos.k...@gmail.com]
Sent: miércoles, 06 de abril de 2016 23:03
To: 'Richard Adler'
Subject: RE: [racket-users] macros within expressions.
You don't need a macro here. Why not simply:
(map point-y points)
May be your
The following works in the definitions window of DrRacket:
#lang racket
(module a racket (display 'dog))
(module b racket (require (submod ".." a)))
(require 'b)
Display 'dog' when run.
But reversing the order of the submodules a and b does not work:
#lang racket
(module b racket (require
the choice of order as has been made seems more natural.
Thanks again,
Jos
-Original Message-
From: Matthias Felleisen [mailto:matth...@ccs.neu.edu]
Sent: martes, 22 de marzo de 2016 17:13
To: Jos Koot
Cc: 'Racket Users'
Subject: Re: [racket-users] submodule order dependency
On Mar 22,
Hi
In all computer languages it is more difficult to read data than to write
them, I think.
Racket (like more lisp-like languages) is rather easy on this:
give it sexprs to read and you have no problems.
If you want to accept other types of input, you need a parser.
In the past I have made
graphics/graphics is simple and therefore great.
Two questions, though.
When I have in the definitions window of DrRacket a program that opens a
number of viewports, run it, then make corrections in my code and run it
again, the viewports are nicely closed, but the positions of the viewports
in
In addition to my previous mail:
Did you notice that allDiff? is, or at least must be, symmetrical in its two
arguments?
That is (allDiff? list1 list2) always must return the same answer as
(allDiff? list2 list1)
Jos
-Original Message-
From: Jos Koot [mailto:jos.k...@gmail.com]
Sent
I dont get the error when running your example.
Notice that your function (allDiff? '() '(1 2 3)) returns '()
I suppose you want #t in this case.
Why the line( if (null? (cdr list1)) ?
Simpler is:
(define (allDiff? list1 list2)
(if (null? list1) #t
(if (memq (car list1) list2) #f
Thanks for releasing 6.6.
Downloaded and installed it a few minutes ago.
Did run three of my extensive test programs.
6.6 runs like a quantum or optical lattice clock.
DrRacket of 6.6 seems to load and run much faster than 6.5.
My 2 cents.
Thanks, Jos.
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You received this message because you
code that does this.
If not, I am prepared to produce it (using a hash in order to speed up)
The recursion relations seem to confirm my IIRC of the first line.
Would this be usefull?
Jos Koot
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"Racket Users&q
Hi
As far as I can see a hash has three options only for the equivalence relation
comparing keys: eq?, eqv? and equal?.
Would it be possible to extend Racket such as to allow the preparation of
hashes with a user specified equivalence relation?
May be I can prepare it myself, but I have no idea
Hi,
Just a question, no serious matter.
Why margin notes in scribble are not in the same font as plain text?
I have managed to put my margin notes in the same font (I think) with:
@margin-note{@element["sroman"]{bla bla bla}}
I have the impression that plain text in scribble is in font
To whom is interested
https://github.com/joskoot/restricted-permutations
A module that represents permutations by bijections, id est, by functions.
Documentation (scribble) is included.
Care has been taken such that two permutations representing
the same mathemathical permutation are the same in
again,
Jos
_
From: Jon Zeppieri [mailto:zeppi...@gmail.com]
Sent: jueves, 04 de agosto de 2016 19:06
To: Jos Koot
Cc: Racket Users
Subject: Re: [racket-users] equivalence relation for hash keys
On Thu, Aug 4, 2016 at 12:34 PM, Jos Koot <jos.k...@gmail.com> wrote:
Hi
As far as
Thanks again.
Just had a look. The docs are very clear.
Jos
-Original Message-
From: Ryan Culpepper [mailto:ry...@ccs.neu.edu]
Sent: jueves, 04 de agosto de 2016 18:40
To: Jos Koot; 'Racket Users'
Subject: Re: [racket-users] equivalence relation for hash keys
See `define-custom-hash
Why not send a congratulation?
I am not sure whose face is in the debug button,
but anyway: CONGRATULATIONS to whom it concerns.
(Is it Robby Findler?)
Jos
PS: Richard: You may congratulate yourself with having Racket at your disposal.
-Original Message-
From: 'Richard Adler' via
Hi,
First: thanks for version 6.8.
I have the following:
#lang scribble/manual
@(require
scribble/core
scribble/eval
racket
scribble/html-properties
(for-label racket)
(for-syntax racket))
@interaction[
(let ()
(code:comment #,(list "a" "b"))
(code:comment #,(list "a" "b"))
Question:
In the definitions window of DrRacket:
#lang racket
(for/list ((x (in-list '(a b c))) (k (in-naturals))) (cons k x))
When I place the cursor on the leftmost parenthesis of the for/list form,
I see a pink arrow to the subexpr (cons k x).
How can (cons k x) possibly be in tail position
Thanks, I'll look into that.
Jos
-Original Message-
From: Ryan Culpepper [mailto:ry...@ccs.neu.edu]
Sent: jueves, 04 de agosto de 2016 18:40
To: Jos Koot; 'Racket Users'
Subject: Re: [racket-users] equivalence relation for hash keys
See `define-custom-hash-types` in `racket/dict`. Note
Thanks very much.
Very clear answer.
I am talking about HTML, indeed.
I certainly will try your code.
Thanks again, Jos
-Original Message-
From: Dupéron Georges [mailto:jahvascriptman...@gmail.com]
Sent: martes, 23 de agosto de 2016 12:56
To: Racket Users
Cc: jos.k...@gmail.com
Subject:
Would this do what you want?
#lang scribble/base
@section{a}
@subsubsub*section{a}
@subsubsub*section{a}
@subsubsub*section{a}
@section{b}
@seclink["a" "section a"]
@subsubsub*section{b}
@subsubsub*section{b}
@subsubsub*section{b}
@section{b}
@subsubsub*section{b}
@subsubsub*section{b}
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