Re: [racket-users] HTDP 2ed Learning resources and solutions to exercises

2021-12-22 Thread 'John Clements' via Racket Users
Solutions for the first edition are available at https://htdp.org/2003-09-26/Solutions/ Also, you will probably find a faster response for questions like this at the racket discourse, https://racket.discourse.group/ (You might even find a pointer to 2e solutions? not sure) Best, John

Re: [racket-users] Discourse - Mailing list mode

2021-12-09 Thread 'John Clements' via Racket Users
>> ocean with sendgrid or mailgun). Receiving email is handled by the 'mail >> receiver container' if you are self hosting. >> >> It was a casual conversation, and I don't know him well. It would be good >> to know if other PL communities have done this >&g

Re: [racket-users] Discourse - Mailing list mode

2021-12-08 Thread 'John Clements' via Racket Users
Your points are well taken, and moving away from a traditional mailing list is not a decision that we took lightly; the fact is that we were simply *failing* when it came to moderating the mailing list as run by google groups, and running one through mailman was even worse. It appears that

[racket-users] deleting terms of service for discourse group

2021-12-02 Thread 'John Clements' via Racket Users
Following up on feedback from y’all, we’ve deleted the terms of service for the racket discourse group. https://racket.discourse.group/tos Hopefully this (lack of) TOS allays concerns about participation in the discourse group. John -- You received this message because you are subscribed

Re: [racket-users] Racket Discourse

2021-11-23 Thread 'John Clements' via Racket Users
I’m sorry to hear that! Several things to check/try 1) I see the confirmation email coming from “rac...@discoursemail.com”, with subject line "[Racket Discussions] Confirm your new account” Maybe it’s in your junk folder? 2) You can always ignore the given url and just go to

Re: the end of the [racket-users] mailing list and the migration to Discourse as a forum for Racket

2021-11-22 Thread 'John Clements' via Racket Users
Terms of service: Can't believe I signed my rights away to company_name > without even reading applicable_laws in jurisdiction_here. > > > > > On Mon, Nov 22, 2021 at 9:19 AM Sage Gerard wrote: > Mozilla's notes on their own instance summarizes an email-exclusive > workflow well. >

Re: the end of the [racket-users] mailing list and the migration to Discourse as a forum for Racket

2021-11-22 Thread 'John Clements' via Racket Users
Yes, I believe that replies by email are currently enabled. Here, let me test that. … Oh, yeah… can’t do that, the incoming email address isn’t the one that I send from. Sigh. Perhaps someone else can try this? One thing that I know isn’t set up yet is starting a new topic by email. I know

Re: [racket-users] Racket Discourse

2021-11-22 Thread 'John Clements' via Racket Users
Good questions: 1) Yes, Sam mentioned the discourse group at RacketCon, and there was some “hallway” discussion about it. 2) No, no sponsor was involved. Yikes! Indeed, I’m not aware that Racket *has* any sponsors currently, aside from the research and infrastructure grants that are being

Re: the end of the [racket-users] mailing list and the migration to Discourse as a forum for Racket

2021-11-22 Thread 'John Clements' via Racket Users
I’m … super confused by this message. Did I miss something? I feel like this message has a subtext that I’m completely missing. John > On Nov 22, 2021, at 08:06, Etan Wexler wrote: > > The stewards of Racket have decided that it’s time to give up on the mailing > list (that is, racket-users,

Re: [racket-users] Racket Discourse

2021-11-22 Thread 'John Clements' via Racket Users
I’m actually very heartened to see the boilerplate here; it sounds like this is something we can edit, and not something imposed by Discourse. If that’s the case, then it certainly seems likely that we can find some language (or, more importantly, *lack* of language) that makes more of us

Re: [racket-users] Racket Discourse

2021-11-21 Thread 'John Clements' via Racket Users
" (see > https://support.google.com/groups/answer/2464926?hl=en#posting=%2Csettings-reference%2Cadvanced-settings-reference). > If this is the official moment for giving up on this mailing list, it would > probably be good to turn up these settings to some draconian level anyway, > jus

Re: [racket-users] Racket Discourse

2021-11-21 Thread 'John Clements' via Racket Users
xample, FAQs probably should > go to the wiki. There's no need to clutter anyone's inbox for this type of > content. > > On Sun, Nov 21, 2021 at 10:09 AM 'John Clements' via Racket Users > wrote: > TL;DR: Go to > >https://racket.discourse.group/invit

[racket-users] Racket Discourse

2021-11-21 Thread 'John Clements' via Racket Users
TL;DR: Go to https://racket.discourse.group/invites/okLTSrQw1T and sign up for Racket Discourse (https://racket.discourse.group/) # Thoughts behind the move: Over time, it has become steadily more apparent that email-only mailing lists are an outdated communication medium for the Racket

Re: [racket-users] How to learn the *core* of Racket?

2021-11-11 Thread 'John Clements' via Racket Users
> On Nov 11, 2021, at 03:04, Yushuo Xiao wrote: > > Thank you for your comprehensive answer! It helps a lot. I also read more > about Racket after I posted the question and now I think that the few special > forms (as stated in "fully expanded program") are the core. All languages > built in

[racket-users] Racket v8.3

2021-11-06 Thread 'John Clements' via Racket Users
Racket version 8.3 is now available from https://racket-lang.org/ * Racket removes syntax arming and disarming in favor of a simpler system of protected syntax operations, along with other updates to the syntax system. * DrRacket has improved support for custom #lang languages. * Typed

Re: [racket-users] How to discover a struct's interface without Dr Racket?

2021-10-29 Thread 'John Clements' via Racket Users
In the text below, you refer to the “public” interface. Can I ask what you mean by “public” in this context? John > On Oct 29, 2021, at 11:16 AM, Brian Beckman wrote: > > I believe that run time will be the most plausible use case. I may write > macros that refer to struct-procedure names at

Re: [racket-users] using neg-propositions in partition?

2021-10-05 Thread 'John Clements' via Racket Users
rk like you'd want? Based on Alex's last comment > on the issue, it seems hard to give a predicate that matches the type. > > > (Whenever I've wanted `partition` in typed code, I was always able to > use 2 filters instead.) > > On 10/5/21, 'John Clements' via Racket User

[racket-users] using neg-propositions in partition?

2021-10-05 Thread 'John Clements' via Racket Users
I was somewhat surprised to see today that I can’t use a predicate with both positive and negative propositions in the way I would expect with partition: > (:print-type partition) (All (a b) (case-> (-> (-> b Any : #:+ a) (Listof b) (values (Listof a) (Listof b))) (-> (-> a Any) (Listof

Re: [racket-users] What is the correct name for non-list parenthesized forms?

2021-09-24 Thread 'John Clements' via Racket Users
I think I wouldn’t say “accepts”; I usually reserve this term for functions, but that’s a minor quibble. I think I would call these “clauses”, as in “With-handlers allows the user to specify exception-handling clauses. Each one includes two parts: a predicate, indicating whether blah blah

Re: [racket-users] Bootstrap on Racket

2021-09-04 Thread 'John Clements' via Racket Users
I use Greg Hendershott’s excellent and trouble-free ‘frog’ library. How would your code relate to this? John > On Aug 30, 2021, at 10:57, Dexter Lagan wrote: > > Hi again, > > I've been working on porting my Newstrap Web framework from newLISP to > Racket. I got most of it done and am

[racket-users] Racket v8.2

2021-07-18 Thread 'John Clements' via Racket Users
-- Racket version 8.2 is now available from https://racket-lang.org/ * Racket CS improved the performance of large-integer arithmetic. * Racket has improved support for layered and tethered installation. * Racket CS

Re: [racket-users] Question from a beginner. Why Racket Over Scheme?

2021-07-13 Thread 'John Clements' via Racket Users
Allow me to be very slightly less cautious than Robby: it may not be clear from this text that nearly every BSL program is also a Racket program *and* a Scheme program. If you work through HtDP—or even a part of it—you will be, I claim, both a Scheme and a Racket programmer. (And perhaps also

Re: [racket-users] Question from a beginner. Why Racket Over Scheme?

2021-07-13 Thread 'John Clements' via Racket Users
Good to hear from you! There are actually a number of different books that I might suggest. In order to best direct you, it might be useful to know something about your programming background? Best, John Clements > On Jul 13, 2021, at 10:13, joseph turco wrote: > > Hello, > > Im am looking

Re: [racket-users] Racket Slack archive [help wanted]

2021-06-08 Thread 'John Clements' via Racket Users
Hearing about this for the first time, seems like a fantastic idea. 10 seconds of experience: 1) It wasn’t immediately clear to me that the links were the names of channels. It seems painfully obvious to me now, but perhaps it’s worth starting all the names with hashes? 2) Clicking on the

Re: [racket-users] student produces absolutely bonkers environment lookup code

2021-05-13 Thread 'John Clements' via Racket Users
Yep, I think that’s probably on the money. I guess this is really a classic example of the problem with writing code using internet search. Many thanks! > On May 7, 2021, at 4:38 PM, Ben Greenman wrote: > > On 5/7/21, Shu-Hung You wrote: >> Not that I have any idea of what's going on, but

Re: [racket-users] Is there a good Racket DSL alternative to Image Magick?

2021-05-11 Thread 'John Clements' via Racket Users
Racket has the ability to read a variety of different image files. I would go first to 2htdp/image’s “bitmap/file” to read images. “save-image” can write images (but only as png files). I believe there are also an array of lower-level image manipulation functions that are likely to have a less

Re: [racket-users] Racket v8.1

2021-05-09 Thread 'John Clements' via Racket Users
Ah! My apologies. I’ve added your name to our “preferred names” file, and I hope not to make this mistake again. Thank you! John > On May 8, 2021, at 13:38, Dexter Lagan wrote: > > Hello sir, > > Thank you ! My name is actually Dexter Santucci. Apologies for the > confusion. My email

[racket-users] student produces absolutely bonkers environment lookup code

2021-05-07 Thread 'John Clements' via Racket Users
Background: I teach a PL course, using Shriram’s PLAI. Many of the assignments require students to maintain an environment mapping symbols to values. Shriram illustrates a nice easy way to do this, as a list of two-element structures. You can also use an immutable hash. Fine. So I’m grading a

Re: [racket-users] Tell require where to find C libraries ?

2021-05-06 Thread 'John Clements' via Racket Users
It looks to me like you probably need to edit your “config.rktd” file: https://docs.racket-lang.org/raco/config-file.html?q=config.rktd#%28idx._%28gentag._67._%28lib._scribblings%2Fraco%2Fraco..scrbl%29%29%29 On my machine (macOS using macports), for instance I have do do this for every new

[racket-users] Racket v8.1

2021-05-05 Thread 'John Clements' via Racket Users
-- Racket version 8.1 is now available from https://racket-lang.org/ - DrRacket tabs can be dragged, and have new close buttons. - Racket CS supports cross-compilation using `raco exe`. - Racket CS supports Android on

Re: [racket-users] limitation of TR contract translation?

2021-04-30 Thread 'John Clements' via Racket Users
ke this work, but Typed > Racket should probably avoid this situation. > > Sam > > On Fri, Apr 30, 2021, 2:07 AM 'John Clements' via Racket Users > wrote: > It seems that the conversion of TR types to contracts can result in contracts > like (or/c (cons/c any/c any/c) (cons/c

[racket-users] limitation of TR contract translation?

2021-04-30 Thread 'John Clements' via Racket Users
It seems that the conversion of TR types to contracts can result in contracts like (or/c (cons/c any/c any/c) (cons/c any/c any/c)) that apparently cause errors when run. I’m too tired to do a good job of providing a full example… no, actually, it’s pretty easy. Run this program: #lang

Re: [racket-users] Add Link to the racket Discord to the racket website?

2021-04-22 Thread 'John Clements' via Racket Users
This is the second time I’ve heard of matrix.org this week. Time to check it out. John > On Apr 20, 2021, at 1:45 AM, Yury Bulka > wrote: > > Just my 5 cents... > > Recently I had to register on a discord "server" to ask a question > within another community - and the experience was of a

Re: [racket-users] Understanding recursion in the function normalize-definition form the racket sources

2021-04-17 Thread 'John Clements' via Racket Users
I’m confused by your assertion that define-values can’t be used recursively. Here’s a program that does this: #lang racket (define-values (fact) (λ (x) (if (= x 0) 1 (* x (fact (sub1 x)) (fact 14) Am I misunderstanding your message? John Clements > On Apr 17, 2021, at 05:02, Dan Synek

Re: [racket-users] Is this a good uninstall then install Racket plan...

2021-04-13 Thread 'John Clements' via Racket Users
What if he has directories that aren’t part of an installed package? That was my concern, and why I suggested manually deleting compiled subdirs. John > On Apr 13, 2021, at 18:58, Philip McGrath wrote: > > On Tue, Apr 13, 2021 at 8:21 PM 'John Clements' via Racket Users > wrote:

Re: [racket-users] Is this a good uninstall then install Racket plan...

2021-04-13 Thread 'John Clements' via Racket Users
Thanks for clarifying! It sounds to me like the solution might be much much simpler than re-installing an earlier version of racket. Here’s what I recommend. 1) Delete all of the “compiled” subdirectories in your development path. 2) run “raco setup”. It seems likely to me that this will solve

Re: [racket-users] inadvertently upgraded Racket version. Would like to make an older installed version current.

2021-04-13 Thread 'John Clements' via Racket Users
Did you install racket using a package manager, perhaps from the racket PPA? (I’m guessing the answer is yes, since this seems like the most likely situation to have caused an unintentional upgrade.) If so, I think you should generally get the right behavior from using that same package

Re: [racket-users] "You do not have permission to respond to author in this group."

2021-04-13 Thread 'John Clements' via Racket Users
Hmm… that’s a new one to me. It sounds like there’s a setting that can be toggled, I’m not quite sure what the ramifications of toggling that setting would be. John > On Apr 13, 2021, at 1:05 PM, Don Green wrote: > > "You do not have permission to respond to author in this group." > upon

Re: [racket-users] inadvertently upgraded Racket version. Would like to make an older installed version current.

2021-04-13 Thread 'John Clements' via Racket Users
raco pkg remove is definitely not what you want. In general, I know there are languages (ocaml, haskell, rust) that put their package managers “outside” of the currently installed version, so it might make sense that a package manager command could be used to change to an earlier version of

Re: [racket-users] Questions Regarding My First Program

2021-02-23 Thread 'John Clements' via Racket Users
I *always* use DrRacket… but I admit I may not understand the indenting part of your question. In DrRacket, when you hit the “tab” key, it should move the text on the line to the “correct” position, according to Racket’s indentation rules. Also, whenever you hit return, the cursor should be

Re: [racket-users] New to Racket

2021-02-17 Thread 'John Clements' via Racket Users
Definitely! What’s up? John Clements > On Feb 17, 2021, at 10:36 PM, Rohan Posthumus > wrote: > > Good morning, > > I am new to Racket and want to know where I can ask questions if I do not > understand something. Is this the correct platform? > > Kind regards > Rohan > > -- > You

Re: [racket-users] Racket v8.0 (!)

2021-02-16 Thread 'John Clements' via Racket Users
rik Boom wrote: >>> >>> On Sat, Feb 13, 2021 at 09:17:26PM -0500, 'John Clements' via Racket Users >>> wrote: >>>> *** Racket 8.0 is here! *** >>>> >>>> Racket version 8.0 is now available from >>>> >>>>

Re: [racket-users] Racket v8.0 (!)

2021-02-16 Thread 'John Clements' via Racket Users
Help me out: which platform are you referring to? John > On Feb 16, 2021, at 8:10 AM, Hendrik Boom wrote: > > On Sat, Feb 13, 2021 at 09:17:26PM -0500, 'John Clements' via Racket Users > wrote: >> *** Racket 8.0 is here! *** >> >> Racket version 8.0 is now

[racket-users] Racket v8.0 (!)

2021-02-13 Thread 'John Clements' via Racket Users
*** Racket 8.0 is here! *** Racket version 8.0 is now available from https://racket-lang.org/ Racket 8.0 marks the first release where Racket CS is the default implementation. Creating, polishing, and adopting Racket CS has been a 4-year effort involving the entire Racket community. At this

Re: [racket-users] requiring a file on windows

2021-02-02 Thread 'John Clements' via Racket Users
In order to allow static compilation, the path in a (file …) require must be a literal string. It sounds like you might be looking for “dynamic-require” ? Apologies if I’m misunderstanding you. John Clements > On Feb 2, 2021, at 3:20 PM, thro...@gmail.com wrote: > > I can't seem to build

Re: [racket-users] Does password reset work on pkgs.racket-lang.org?

2021-02-01 Thread 'John Clements' via Racket Users
FWIW, I recall problems like this as well, about four years ago. I think we wound up resetting it manually, at the time. John > On Feb 1, 2021, at 8:48 AM, Jay McCarthy wrote: > > I just checked it and I got an email, but it was put into spam. > > If you can't identify a problem on your

Re: [racket-users] 32bit linux downloads

2021-01-26 Thread 'John Clements' via Racket Users
I don’t think we were planning on having those. It looks like the last time we made 32-bit binaries available was for version 7.3, in May 2019. John Clements > On Jan 26, 2021, at 5:31 AM, Ed Kademan wrote: > > > Will Racket 8 have 32-bit linux binaries available for download? > > -- > You

[racket-users] Racket v7.9.0.900 is available for testing

2021-01-22 Thread 'John Clements' via Racket Users
Hello, most excellent Racket Users! Version 7.9.0.900 is now available for testing from https://pre-release.racket-lang.org/ (Note that this is not available from the usual download site.) If all goes well, we will turn this version into a v8.0 release within a couple of

Re: [racket-users] Permutations ind Racket

2020-12-16 Thread 'John Clements' via Racket Users
Are you using the “How To Design Programs” textbook? It’s free, online, and written by the team that developed Racket: https://htdp.org/2020-8-1/Book/index.html Indeed, it would not be a stretch to say that Racket and this textbook are part of the same project. How To Design Programs (or

Re: [racket-users] Unusable mail group

2020-11-29 Thread 'John Clements' via Racket Users
It looks to me like there is a “My membership settings” pane in the left of the google groups web interface that allows you to specify the “email used for membership”. I conjecture that this would control the delivery of group e-mails. I also strongly suspect that this will only allow you to

Re: [racket-users] compiler books

2020-11-27 Thread 'John Clements' via Racket Users
If you’re specifically interested in 1) Compilers, and 2) Racket, I think it’s hard to do better than Jeremy Siek’s Essentials of Compilation. He comes from the Indiana group, as, indirectly, does just about everything around here, and his approach is very closely related to Dybvig/Chez,

Re: [racket-users] Racket v7.9

2020-11-02 Thread 'John Clements' via Racket Users
version of libedit is included with Racket. Best to everyone, John > On Nov 2, 2020, at 4:10 PM, 'John Clements' via Racket Users > wrote: > > Racket version 7.9 is now available from > >https://racket-lang.org/ > > > * Racket CS may become the de

[racket-users] Racket v7.9

2020-11-02 Thread 'John Clements' via Racket Users
Racket version 7.9 is now available from https://racket-lang.org/ * Racket CS may become the default Racket implementation in the next release. If, between this release and the next, no bugs are discovered in Racket CS that are more serious than those typically discovered in Racket

Re: [racket-users] FYI, build from HEAD fails in realloc()

2020-10-27 Thread 'John Clements' via Racket Users
> > Sam > > On Tue, Jun 30, 2020 at 4:47 PM 'John Clements' via Racket Users > wrote: >> >> D’oh! Closing the loop on this one… it appears to me that this problem >> occurred after running a “make” (that is, a BC make) in a directory in which >> I’d bee

Re: [racket-users] garbage collection

2020-10-25 Thread 'John Clements' via Racket Users
It depends a lot on what you mean by a “Lisp-y” language. I’m certainly not going to disagree with the sentiments expressed in the stack overflow post that Dan Prager posted… after all, I wrote the top-posted one! You’re asking a question about persuading a co-worker, though. In my opinion, the

[racket-users] Re: [racket-dev] RacketCon is next weekend!

2020-10-09 Thread 'John Clements' via Racket Users
Just checked out the gather space. It looks very cool. How about some easter eggs? John > On Oct 9, 2020, at 7:07 AM, Jay McCarthy wrote: > > To the friends and followers of Racket, > > You have produced thousands of commits since last Con. You have honored your > ancestors and brought

Re: [racket-users] package manager woes on Windows 10?

2020-09-15 Thread 'John Clements' via Racket Users
I have a question about the new behavior. (ObResearch: actually, I checked the drracket, racket, and gui repos, and I couldn’t find any new push, so I couldn’t check the code myself.) Does it simply strip newlines, as Jack suggested, or does it signal an error? The latter seems less likely to

Re: [racket-users] package manager woes on Windows 10?

2020-09-10 Thread 'John Clements' via Racket Users
Shriram, have you ruled out the classic multi-paste prolem? It looks very much like that’s what you’re seeing here. That is, if you paste a string that ends with a newline into the “do what I mean” box, it will appear still to be blank. So you paste it again. So you paste it again. Eventually

Re: [racket-users] Advice for beginner

2020-09-08 Thread 'John Clements' via Racket Users
Can you be more specific? Are there particular programs that you can point to? I think the solution to your problem is going to depend a bit on the kind of slowdowns that you’re seeing. Best, John Clements > On Sep 7, 2020, at 05:04, Denis Maier wrote: > > > Hi, > > I've started working

Re: [racket-users] Racket v7.8

2020-08-04 Thread 'John Clements' via Racket Users
Yes, there is documentation for this feature! Here are two ways to get it: 1) On a machine with 7.8 installed, run `raco docs prop:struct-field-info` at the command line, or (equivalently) highlight the word in drracket and hit F1. Both of these open a web browser window pointed at your local

[racket-users] Re: Racket v7.8

2020-08-03 Thread 'John Clements' via Racket Users
This release announcement mistakenly omitted two important contributors: Tim Brown, and Dionna Amalie Glaze. Many thanks for their help! John Clements > On Aug 3, 2020, at 09:35, John Clements wrote: > > Racket version 7.8 is now available from > >https://racket-lang.org/ > > > *

[racket-users] Racket v7.8

2020-08-03 Thread 'John Clements' via Racket Users
Racket version 7.8 is now available from https://racket-lang.org/ * Racket CS may become the default Racket implementation in the next release. With the improvements in this release, Racket CS provides all of the functionality of Racket BC (the current default implementation). If,

Re: [racket-users] with-continuation-marks in errortrace

2020-07-27 Thread 'John Clements' via Racket Users
Let me jump in here and say a few things that maybe everyone already knows :). The stepper’s annotation places a *ton* of annotation on a computation, and allows the reconstruction of the full computation. Errortrace does less, and provides less. The both share a goal of allowing the

Re: [racket-users] note about parsing speed of xml vs sxml?

2020-07-01 Thread 'John Clements' via Racket Users
Ryan, I just tested your pull request, and… it doesn’t make much difference in my example. One important thing that I realize that I *totally neglected* to mention is that I’m running CS racket here, not BC. Based on my experiments, it appears that 1) CS is much faster than BC for both

Re: [racket-users] FYI, build from HEAD fails in realloc()

2020-06-30 Thread 'John Clements' via Racket Users
> Thanks, > > Paulo Matos > > 'John Clements' via Racket Users writes: > >> Bang! I was wrong. Here’s another similar trace: >> >> raco setup: 6 running: >> /pfds/pfds/scribblings/functional-data-structures.scrbl >> raco setup: 4 running: /jbc-utils/

[racket-users] Sound scrubbing with rsound

2020-06-15 Thread 'John Clements' via Racket Users
To Advait Raykar: In response to a Slack thread about a scrubbing interface for sound playback: Looks like you folks covered all the bases on rsound. It sounds like the "right" interface for this would be something that plays a file from start to finish but also allows you to asynchronously

Re: [racket-users] Finite state machine

2020-05-28 Thread 'John Clements' via Racket Users
Good to hear from you! Unfortunately, it’s going to be really hard to help you without more information. Can you give us some context on what your goal is, here? Is this part of a class? Your problem seems very under-specified. John > On May 27, 2020, at 8:53 PM, Med Ra wrote: > > Dear

Re: [racket-users] Migrating from a "model-driven" language framework to Racket

2020-05-26 Thread 'John Clements' via Racket Users
Okay, I could just be putting my foot in my mouth, here, but it sounds like you’re describing the kinds of things that are typically done by a type-checker. Have you considered adding a type-checking pass? It would contain an environment that maps names like “h1” to “types” that indicate that

Re: [racket-users] Migrating from a "model-driven" language framework to Racket

2020-05-25 Thread 'John Clements' via Racket Users
> ... > So far, I have made two attempts to work around these issues: (1) by creating > a metamodel-like data structure using Racket structs, and transforming syntax > objects into struct instances; or (2) using syntax objects only and attaching > context data to each of them as a syntax

Re: [racket-users] running Racket inside gradescope

2020-05-19 Thread 'John Clements' via Racket Users
100% yes but no. I am a long-time gradescope user, and I’ve been very happy with it. However, my usage has been entirely with scanned paper exams. I like the work that Gradescope has been doing, but I haven’t engaged with any of their tools beyond the paper-scanning ones, so I definitely don’t

[racket-users] I should probably stop ignoring this internal error on startup

2020-05-05 Thread 'John Clements' via Racket Users
I think I maybe get this error every time I start up. Is this normal? I tried moving all prefs files aside to see if it was a configuration error, and … same thing. In fact, even when I go into the three listed directories (pkgs/algol60, collects/racket, collects/syntax/parse/lib) and delete

[racket-users] Racket v7.7

2020-05-02 Thread 'John Clements' via Racket Users
Racket version 7.7 is now available from https://racket-lang.org/ * Racket CS remains ready for production use---thanks to those who have been putting it into practice to help iron out the remaining kinks---and it now supports a C API for embedding into other applications. See the

Re: [racket-users] FrTime magic updating seconds

2020-04-28 Thread 'John Clements' via Racket Users
Wait! I got it! I forgot. It’s not hash-lang. I have to choose the language via the “choose language…” menu. Sorry for the noise, folks. John > On Apr 28, 2020, at 3:28 PM, 'John Clements' via Racket Users > wrote: > > Okay, I have several things to say about Father Time. &g

[racket-users] FrTime magic updating seconds

2020-04-28 Thread 'John Clements' via Racket Users
Okay, I have several things to say about Father Time. Thing one: running through these demos (frtime/demos) is kind of astonishing. There just doesn’t seem to be enough code for it to do what it’s doing. The father time programs are *incredibly* concise distillations of behavior. The

Re: [racket-users] New week, new Racket! What are you folks up to?

2020-04-22 Thread 'John Clements' via Racket Users
Alongside everything else, I started exploring writing code to post GraphQL queries (specifically in order to interact with Canvas). The language’s syntax is yet another needlessly complicated approximation to s-expressions, but I do have some things working. Not sure if I should put together a

Re: [racket-users] Typed version of sxml?

2020-04-21 Thread 'John Clements' via Racket Users
Are you asking because you’d like your own code using SXML to be typed, or because you’d like the sxml implementation to be typed? I think another way of asking this is: are you worried about bugs in your code, or about bugs in Oleg’s code? I think that rewriting the sxml library into TR would

Re: [racket-users] visit a sequence of files

2020-04-21 Thread 'John Clements' via Racket Users
n Mac it's: > > previous window: Shft + Cmd + ~ > > next window: Cmd + ~ > > > > or > > > > previous window: Cmd + > > next window: Cmd + > > > > On Tue, Apr 21, 2020 at 4:29 PM 'John Clements' via Racket Users > > wrote: > > Here’s

Re: [racket-users] visit a sequence of files

2020-04-21 Thread 'John Clements' via Racket Users
; > On Tue, Apr 21, 2020 at 4:29 PM 'John Clements' via Racket Users > wrote: > Here’s a question I have about both DrRacket and Emacs. It often happens in > my workflow (grading files, for instance) that I want to set up a list of > files, and then have an easy way to move forward o

[racket-users] visit a sequence of files

2020-04-21 Thread 'John Clements' via Racket Users
Here’s a question I have about both DrRacket and Emacs. It often happens in my workflow (grading files, for instance) that I want to set up a list of files, and then have an easy way to move forward or back in that list (“next file”, “previous file”). I see that emacs has a function called

Re: [racket-users] New to racket, help with coursework question

2020-04-19 Thread 'John Clements' via Racket Users
First off: you’re very close. Thing two: I think you need a clearer comment on the meaning of the “months” vector. Your description does not actually say what the vector represents or contains. Thing three: Here’s my question to you. Suppose that I tell you a year and a month and the result

[racket-users] http basic auth needed for github

2020-04-01 Thread 'John Clements' via Racket Users
Relevance: our build scripts make automated queries to GitHub. Historically, GitHub has allowed authentication using query parameters; both a user token and a client user/password pair could be specified as part of the URL. It now appears that this is being deprecated, per

Re: [racket-users] auto-indentation... off by one^H^H^Hsome?

2020-03-21 Thread 'John Clements' via Racket Users
Many thanks! Should I cancel my pull request? John > On Mar 21, 2020, at 18:34, Robby Findler wrote: > > I've pushed something so that racket:text% will indent better when it > doesn't have a display. > > Robby > > On Fri, Mar 20, 2020 at 4:32 PM John Clements > wrote: >> >> Made a pull

Re: [racket-users] trace facility in Racket?

2020-03-21 Thread 'John Clements' via Racket Users
Right, sorry, I should have added… doing *that* (eliminating the traces for production code) is almost trivial: just make a macro that’s defined to disappear when a flag is set: #lang racket (define-for-syntax production-flag #f) (define-syntax (debug-only stx) (syntax-case stx () [(_

Re: [racket-users] trace facility in Racket?

2020-03-21 Thread 'John Clements' via Racket Users
It sounds like you’re looking for a way to have the trace inserted for you by a debugging tool, so you don’t have to remember to take it out again later. This wouldn’t be hard to do, but (as far as I know) no one’s taken the time to do it. John > On Mar 21, 2020, at 8:43 AM, Nicholas Papadonis

Re: [racket-users] FYI, build from HEAD fails in realloc()

2020-03-20 Thread 'John Clements' via Racket Users
]: *** [plain-in-place] Error 2 make: *** [in-place] Error 2 make 240.77s user 75.70s system 398% cpu 1:19.32 total > On Mar 20, 2020, at 3:11 PM, 'John Clements' via Racket Users > wrote: > > Here’s the tail of a build of racket HEAD that just failed during a call to > realloc(). I went

[racket-users] FYI, build from HEAD fails in realloc()

2020-03-20 Thread 'John Clements' via Racket Users
Here’s the tail of a build of racket HEAD that just failed during a call to realloc(). I went back far enough to be sure I had a full record of what was running on cores 0-7. I strongly suspect this is not reproducible, and I don’t think there’s any further information that would be useful

Re: [racket-users] auto-indentation... off by one^H^H^Hsome?

2020-03-20 Thread 'John Clements' via Racket Users
Made a pull request, many thanks! John > On Mar 20, 2020, at 1:36 PM, Robby Findler wrote: > > Looks right to me! > > On Fri, Mar 20, 2020 at 3:26 PM John Clements > wrote: > Could I add a note like this to the docs for the indentation function? > > “NB: indentation results depend on the

Re: [racket-users] auto-indentation... off by one^H^H^Hsome?

2020-03-20 Thread 'John Clements' via Racket Users
Could I add a note like this to the docs for the indentation function? “NB: indentation results depend on the graphical context associated with the object; it may be necessary to associate the object with an editor-canvas and frame in order to get the expected results." That text might not

Re: [racket-users] auto-indentation... off by one^H^H^Hsome?

2020-03-20 Thread 'John Clements' via Racket Users
(list table rx1 rx2 rx3 rx4)) > (send t tabify-all) > (send t get-text))) > (values untabbed tabbed lambda-tabbed))) > > On 3/20/20 3:12 PM, ‘John Clements’ via Racket Users wrote: > > > >> That actually solves a bunch of

Re: [racket-users] auto-indentation... off by one^H^H^Hsome?

2020-03-20 Thread 'John Clements' via Racket Users
Ah! this solves the issue. many thanks. > On Mar 20, 2020, at 1:03 PM, Robby Findler wrote: > > Looks like you need a display or the text gets confused about how big > (in pixels) characters really are: > > #lang racket/gui > (require framework) > (define f (new frame% [label ""])) > (define t

[racket-users] Re: auto-indentation... off by one^H^H^Hsome?

2020-03-20 Thread 'John Clements' via Racket Users
That actually solves a bunch of problems for me… but strangely, not the initial one. If, for instance, I tabify (+ 3 4) using the tabify-all method, the line with the four gets an indentation of 2, not 8. This is definitely different from DrRacket’s behavior. Any idea how to fix this?

[racket-users] Test message sent to racket-users@googlegroups.com

2020-03-20 Thread 'John Clements' via Racket Users
Please ignore, thanks. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit

Re: [racket-users] Lambda calculus done in Racket

2020-02-20 Thread 'John Clements' via Racket Users
I’m sure many other people have something like this, but here’s “Lab 5” from my currently-running PL course: https://www.brinckerhoff.org/clements/2202-csc430/Labs/lab5.html It introduces church numeral encodings and also this kind of true-false encoding as small programming challenges in

Re: [racket-users] Web server + authentication

2020-02-15 Thread 'John Clements' via Racket Users
Wait, we *all* have postmark libraries? Sigh. John > On Jan 23, 2020, at 16:29, Jens Axel Søgaard wrote: > > Den tor. 23. jan. 2020 kl. 01.47 skrev Matthew Butterick : > I concur on Postmark. For 2+ yrs I've used it with the Racket web server for > mbtype.com. I pass the server settings to

Re: [racket-users] resources for learning JS / React?

2020-02-15 Thread 'John Clements' via Racket Users
Belatedly: awesome, many thanks! John > On Jan 27, 2020, at 02:39, Sean Kemplay wrote: > > > This is a good (free) course that takes you the lates best practices of JS > (getting more functional), react and then react native. > >

Re: [racket-users] Rolling dice game

2020-02-15 Thread 'John Clements' via Racket Users
Have you taken a look at How To Design Programs? At the end of section one, you should have what you need to build these games and others like them: https://htdp.org/2019-02-24/part_one.html John Clements > On Feb 3, 2020, at 03:31, Wilzoo wrote: > > Hi guys, so I am working on rolling dice

Re: [racket-users] How to convert String to Integer

2020-02-15 Thread 'John Clements' via Racket Users
(error 'string2value "expected a string convertible to an integer, got: ~e" str)])) Best, John Clements > On Feb 15, 2020, at 10:37, 'John Clements' via Racket Users > wrote: > > ?? > >> (string2value "-1234"

Re: [racket-users] How to convert String to Integer

2020-02-15 Thread 'John Clements' via Racket Users
?? > (string2value "-1234") - : Integer -28766 > (string2value "abcd") - : Integer 54562 > Is this your desired behavior? > On Feb 12, 2020, at 16:43, Alain De Vos wrote: > > I came to the following result as conversion function : > > #lang typed/racket > (: string2value (-> String

Re: [racket-users] resources for learning JS / React?

2020-01-26 Thread 'John Clements' via Racket Users
Many thanks! These look good. John Clements > On Jan 26, 2020, at 05:15, Darren Newton wrote: > > For learning JavaScript these two resources are very good: > > Eloquent JavaScript https://eloquentjavascript.net/ > You Don't Know JS https://github.com/getify/You-Dont-Know-JS > > The tutorial

[racket-users] style guide addition?

2020-01-20 Thread 'John Clements' via Racket Users
I’m grading code, and one of my students keeps leaving out spaces in weird places: (cond [(< x 3)(+ x 1)] [else (f(g 9))]) I took a quick look in the style guide, and it doesn’t seem to have much to say about this. Here’s what it has: 6.8 Spaces Don’t pollute your code with spaces at the

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