# General **URL:** https://racket.discourse.group/c/general/12.md?page=5 [Latest](https://racket.discourse.group/latest.md) · [Categories](https://racket.discourse.group/categories.md) · [Tags](https://racket.discourse.group/tags.md) **Page:** 6 --- ## [Wanting more general constraint/functional graphics in 2D and 3D](https://racket.discourse.group/t/wanting-more-general-constraint-functional-graphics-in-2d-and-3d/3807)
**Author:** [@Greg\_Davidson](https://racket.discourse.group/u/Greg_Davidson)\ **Replies:** 1\ **Last updated:** [June 26, 2025, 11:17pm UTC](https://racket.discourse.group/t/wanting-more-general-constraint-functional-graphics-in-2d-and-3d/3807 "2025-06-26T23:17:37Z")
We have draw, pict, 2htdp/image, metapict and the ability to write svg files. Learners who start with the Quick tutorial have to switch to image for the 2htdp tutorials. Could we make it easier to use the two in combi… --- ## [\`~describe\` vs. \`#:role\` in \`syntax-parse\`](https://racket.discourse.group/t/describe-vs-role-in-syntax-parse/3795)
**Author:** [@LiberalArtist](https://racket.discourse.group/u/LiberalArtist)\ **Replies:** 4\ **Last updated:** [June 21, 2025, 2:45am UTC](https://racket.discourse.group/t/describe-vs-role-in-syntax-parse/3795 "2025-06-21T02:45:30Z")
How should we choose between ~describe descriptions and #:role for error information with syntax-parse? Consider this macro, inspired by a discussion on Discord: #lang racket (require (for-syntax syntax/parse)) (defi… --- ## [Notes on Concurrency](https://racket.discourse.group/t/notes-on-concurrency/3794)
**Author:** [@maueroats](https://racket.discourse.group/u/maueroats)\ **Replies:** 1\ **Last updated:** [June 16, 2025, 2:15am UTC](https://racket.discourse.group/t/notes-on-concurrency/3794 "2025-06-16T02:15:35Z")
This post summarizes parts of a conversation that occurred on Discord. I am not the author of any of the commentary. I am posting it here because I liked the discussion and I don't want it lost in unsearchable Discord hi… --- ## [Bay Area meet-up at Coffee & More, Sunnyvale: 11am Sunday, June 29](https://racket.discourse.group/t/bay-area-meet-up-at-coffee-more-sunnyvale-11am-sunday-june-29/3793)
**Author:** [@countvajhula](https://racket.discourse.group/u/countvajhula)\ **Replies:** 0\ **Last updated:** [June 14, 2025, 6:47pm UTC](https://racket.discourse.group/t/bay-area-meet-up-at-coffee-more-sunnyvale-11am-sunday-june-29/3793 "2025-06-14T18:47:52Z")
Calling all Racket & programming languages enthusiasts in the SF Bay Area! :coffee: Join us for a casual meet-up at Coffee & More in Sunnyvale on Sunday, June 29th at 11am. Code, chat, and make new friends with fellow an… --- ## [Map on nested lists](https://racket.discourse.group/t/map-on-nested-lists/3769)
**Author:** [@damien\_mattei](https://racket.discourse.group/u/damien_mattei)\ **Replies:** 7\ **Last updated:** [June 6, 2025, 10:36am UTC](https://racket.discourse.group/t/map-on-nested-lists/3769 "2025-06-06T10:36:43Z")
I was in need of applying a function to a list of values that contains sub-lists. map can not works on nested lists and i can not find a procedure in the scheme library or SRFI so i wrote my own : (module map-nested rac… --- ## ["Contributing" link on racket-lang.org is busted](https://racket.discourse.group/t/contributing-link-on-racket-lang-org-is-busted/3774)
**Author:** [@stevebyan](https://racket.discourse.group/u/stevebyan)\ **Replies:** 4\ **Last updated:** [June 6, 2025, 1:16am UTC](https://racket.discourse.group/t/contributing-link-on-racket-lang-org-is-busted/3774 "2025-06-06T01:16:12Z")
I submitted an issue on GitHub to racket/racket-lang-org with the details. --- ## [Racket meet-up: Saturday, 7 June 2025 at 18:00 UTC](https://racket.discourse.group/t/racket-meet-up-saturday-7-june-2025-at-18-00-utc/3771)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [June 4, 2025, 5:06pm UTC](https://racket.discourse.group/t/racket-meet-up-saturday-7-june-2025-at-18-00-utc/3771 "2025-06-04T17:06:47Z")
Everyone is welcome to join us for the :racket: Racket meet-up: Saturday, 7 June 2025 at 18:00 UTC In your timezone: 2025-06-07T18:00:00Z (UTC). (converter). At this meet-up: in-person meet-ups being planned for SF a… --- ## [Accessibility: DrRacket cursor (linux) visiblity](https://racket.discourse.group/t/accessibility-drracket-cursor-linux-visiblity/3764)
**Author:** [@Lynn](https://racket.discourse.group/u/Lynn)\ **Replies:** 2\ **Last updated:** [May 28, 2025, 3:04pm UTC](https://racket.discourse.group/t/accessibility-drracket-cursor-linux-visiblity/3764 "2025-05-28T15:04:01Z")
I cannot see the cursor in DrRacket. (not the mouse pointer) It is too thin and close to not visible at all. I can't find a way to adjust it. Is there a way? --- ## [Image-Based development and Interactive Experience](https://racket.discourse.group/t/image-based-development-and-interactive-experience/3679)
**Author:** [@ungsams](https://racket.discourse.group/u/ungsams)\ **Replies:** 36\ **Last updated:** [May 24, 2025, 3:49pm UTC](https://racket.discourse.group/t/image-based-development-and-interactive-experience/3679 "2025-05-24T15:49:31Z")
Hello everyone, I am new to Racket and was wondering if and how it is possible to have a decent experience (emacs/geiser) in terms of interactive development similar to common lisp. Is there something that allows to rec… --- ## [Should we consider publishing release candidates ("rc")?](https://racket.discourse.group/t/should-we-consider-publishing-release-candidates-rc/3719)
**Author:** [@benknoble](https://racket.discourse.group/u/benknoble)\ **Replies:** 12\ **Last updated:** [May 22, 2025, 6:54pm UTC](https://racket.discourse.group/t/should-we-consider-publishing-release-candidates-rc/3719 "2025-05-22T18:54:14Z")
(With apologies if the release-management tag is inappropriate.) The recent thread about 8.17 package failures had me thinking about release candidates in other communities. For example, Git and Alacritty both publish -… --- ## [Rhombus Documentation](https://racket.discourse.group/t/rhombus-documentation/3740)
**Author:** [@ShalokShalom](https://racket.discourse.group/u/ShalokShalom)\ **Replies:** 3\ **Last updated:** [May 12, 2025, 2:53pm UTC](https://racket.discourse.group/t/rhombus-documentation/3740 "2025-05-12T14:53:32Z")
Hi wonderful people :waving\_hand: Does the documentation generator need a dedicated Racket --\> Rhombus translation in the background, or can it create the existing documentation with the present tools? Considering that… --- ## [Boston Racket Meet-up May 10, 2025](https://racket.discourse.group/t/boston-racket-meet-up-may-10-2025/3717)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 9\ **Last updated:** [May 8, 2025, 6:43pm UTC](https://racket.discourse.group/t/boston-racket-meet-up-may-10-2025/3717 "2025-05-08T18:43:14Z")
Boston Racket Meet-up May 10 at 1pm, Room 366, PRL, Khoury College of Computer Sciences, Northeastern University, Boston (Diagonally across the street from the Museum of Fine Arts.) Take the elevators opposite the bi… --- ## [Cross compiling to a Raspberry Pi](https://racket.discourse.group/t/cross-compiling-to-a-raspberry-pi/3729)
**Author:** [@notjack](https://racket.discourse.group/u/notjack)\ **Replies:** 1\ **Last updated:** [May 7, 2025, 6:18pm UTC](https://racket.discourse.group/t/cross-compiling-to-a-raspberry-pi/3729 "2025-05-07T18:18:06Z")
Has anyone managed to get raco cross working with a Raspberry Pi? Specifically, I have a Racket package and I'd like to take that package's main.rkt file and demodularize it, cross-compile it to an executable for 64-bit … --- ## [RacketCon 2025: Call for Presentations](https://racket.discourse.group/t/racketcon-2025-call-for-presentations/3718)
**Author:** [@bogdan](https://racket.discourse.group/u/bogdan)\ **Replies:** 0\ **Last updated:** [May 4, 2025, 4:40am UTC](https://racket.discourse.group/t/racketcon-2025-call-for-presentations/3718 "2025-05-04T04:40:55Z")
The RacketCon organizing committee is proud to announce the 2025 edition of RacketCon! The fifteenth RacketCon will take place at UMass Boston in Boston, Massachusetts, USA on October 4-5, 2025. RacketCon is a public… --- ## [Spring Lisp Game Jam 2025](https://racket.discourse.group/t/spring-lisp-game-jam-2025/3716)
**Author:** [@hendrikboom3](https://racket.discourse.group/u/hendrikboom3)\ **Replies:** 0\ **Last updated:** [May 3, 2025, 5:46pm UTC](https://racket.discourse.group/t/spring-lisp-game-jam-2025/3716 "2025-05-03T17:46:05Z")
There's another Lisp game jam coming up next month. See Spring Lisp Game Jam 2025 - itch.io for details. --- ## [Repl delays, background CPU](https://racket.discourse.group/t/repl-delays-background-cpu/3684)
**Author:** [@acarrico](https://racket.discourse.group/u/acarrico)\ **Replies:** 9\ **Last updated:** [May 3, 2025, 2:40am UTC](https://racket.discourse.group/t/repl-delays-background-cpu/3684 "2025-05-03T02:40:21Z")
I've noticed some REPL issues. User perceptible delay and 100%CPU usage (two different issues). See below: In emacs / racket-mode: racket-mode\> (let loop () (define form (read)) (unless (eq? form 'q) (println form) (lo… --- ## [Picayune pict documentation details](https://racket.discourse.group/t/picayune-pict-documentation-details/3711)
**Author:** [@hendrikboom3](https://racket.discourse.group/u/hendrikboom3)\ **Replies:** 2\ **Last updated:** [May 1, 2025, 5:35pm UTC](https://racket.discourse.group/t/picayune-pict-documentation-details/3711 "2025-05-01T17:35:50Z")
In 2 Basic Pict Constructors it says The arguments to the rendering procedure will be a drawing context and top-left location for drawing. But it doesn't explain that 'draw' is the rendering procedure. And it's confu… --- ## [Racket meet-up: Saturday, 3 May 2025](https://racket.discourse.group/t/racket-meet-up-saturday-3-may-2025/3704)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [April 27, 2025, 11:33am UTC](https://racket.discourse.group/t/racket-meet-up-saturday-3-may-2025/3704 "2025-04-27T11:33:45Z")
Everyone is welcome to join us for the :racket: Racket meet-up: Saturday, 3 May 2025 at 18:00 UTC In your timezone: 2025-05-03T18:00:00Z (UTC). (converter). At this meet-up: Racket Meet-up Boston! RacketCon2025 Book … --- ## [Renamed my fmt to format](https://racket.discourse.group/t/renamed-my-fmt-to-format/3695)
**Author:** [@joskoot](https://racket.discourse.group/u/joskoot)\ **Replies:** 2\ **Last updated:** [April 17, 2025, 10:11pm UTC](https://racket.discourse.group/t/renamed-my-fmt-to-format/3695 "2025-04-17T22:11:33Z")
My package 'fmt' on GitHub.com conflicted with that of Sorawee' I have renamed my package 'format', available at: https://github.com/joskoot/format --- ## [Main differences between "How to Design Programs 2Ed" and Systematic Program Design](https://racket.discourse.group/t/main-differences-between-how-to-design-programs-2ed-and-systematic-program-design/3686)
**Author:** [@ungsams](https://racket.discourse.group/u/ungsams)\ **Replies:** 2\ **Last updated:** [April 15, 2025, 6:49am UTC](https://racket.discourse.group/t/main-differences-between-how-to-design-programs-2ed-and-systematic-program-design/3686 "2025-04-15T06:49:42Z")
Hello everyone, I wanted to go through the MOOC "Systematic Program Design" or the book HTDP. I was wondering what are the differences between these two. I am aware of the fact that the book contains more exercises I gu… --- ## [Creating real static "standalone executables"](https://racket.discourse.group/t/creating-real-static-standalone-executables/3678)
**Author:** [@ungsams](https://racket.discourse.group/u/ungsams)\ **Replies:** 8\ **Last updated:** [April 13, 2025, 6:15pm UTC](https://racket.discourse.group/t/creating-real-static-standalone-executables/3678 "2025-04-13T18:15:33Z")
Hello everyone, I am new to racket and had a couple of questions about distributing programs in general and if it was really possible to distribute a "single" executable. So far I also had problems with raco distribute … --- ## [Racket meet-up: Saturday, 5 April 2025](https://racket.discourse.group/t/racket-meet-up-saturday-5-april-2025/3610)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [April 6, 2025, 8:45am UTC](https://racket.discourse.group/t/racket-meet-up-saturday-5-april-2025/3610 "2025-04-06T08:45:31Z")
Everyone is welcome to join us for the :racket: Racket meet-up: Saturday, 5 April 2025 at 18:00 UTC In your timezone: 2025-04-05T18:00:00Z (UTC). (converter). At this meet-up: RacketCon2025 Book Club Reading/Discussi… --- ## [Any plan for static type checker?](https://racket.discourse.group/t/any-plan-for-static-type-checker/3669)
**Author:** [@Hazematman](https://racket.discourse.group/u/Hazematman)\ **Replies:** 3\ **Last updated:** [April 1, 2025, 3:21pm UTC](https://racket.discourse.group/t/any-plan-for-static-type-checker/3669 "2025-04-01T15:21:12Z")
Hey, I've been playing around with Rhombus for a little while now and I really like the language. One aspect of it that I find really neat is the static information bindings. I'm curious if there is any plan to allow th… --- ## [Classic Puzzle: Listing List Prefixes](https://racket.discourse.group/t/classic-puzzle-listing-list-prefixes/3541)
**Author:** [@soegaard](https://racket.discourse.group/u/soegaard)\ **Replies:** 3\ **Last updated:** [March 4, 2025, 9:33am UTC](https://racket.discourse.group/t/classic-puzzle-listing-list-prefixes/3541 "2025-03-04T09:33:49Z")
Recently I found an archive of the newsletter "LISP Pointers". The following puzzle was in an article by Olivier Danvy. Below is the introduction to the puzzle. I'll post a solution in a week. Send me a PM if you wan… --- ## [The Call for Papers for FUNARCH2025 is open!](https://racket.discourse.group/t/the-call-for-papers-for-funarch2025-is-open/3647)
**Author:** [@doyougnu](https://racket.discourse.group/u/doyougnu)\ **Replies:** 1\ **Last updated:** [March 24, 2025, 1:11pm UTC](https://racket.discourse.group/t/the-call-for-papers-for-funarch2025-is-open/3647 "2025-03-24T13:11:01Z")
Hello everyone, This year I am chairing the Functional Architecture workshop colocated with ICFP and SPLASH. I'm happy to announce that the Call for Papers for FUNARCH2025 is open - deadline is June 16th! Send us resea… --- ## [Rhombus is ready for early adopters :rhombus:](https://racket.discourse.group/t/rhombus-is-ready-for-early-adopters/3638)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [March 21, 2025, 11:55am UTC](https://racket.discourse.group/t/rhombus-is-ready-for-early-adopters/3638 "2025-03-21T11:55:37Z")
Rhombus is ready for early adopters. :rhombus: :rhombus: :rhombus: Learn more and get it now at https://rhombus-lang.org/ Got questions? Reply to this topic or ask at https://github.com/racket/rhombus/discussions --- ## [Transducers for Racket](https://racket.discourse.group/t/transducers-for-racket/3601)
**Author:** [@damien\_mattei](https://racket.discourse.group/u/damien_mattei)\ **Replies:** 13\ **Last updated:** [March 5, 2025, 6:29pm UTC](https://racket.discourse.group/t/transducers-for-racket/3601 "2025-03-05T18:29:43Z")
Hi, i make available public a package for Racket : SRFI 171 Transducers. I'm NOT THE AUTHOR (i had contacted him by mail many years ago with no answer) of the code of Transducers. I have just ported the code (3 years a… --- ## [Any podcast episodes about Racket/Scheme?](https://racket.discourse.group/t/any-podcast-episodes-about-racket-scheme/3595)
**Author:** [@babysitter](https://racket.discourse.group/u/babysitter)\ **Replies:** 3\ **Last updated:** [March 5, 2025, 4:27pm UTC](https://racket.discourse.group/t/any-podcast-episodes-about-racket-scheme/3595 "2025-03-05T16:27:49Z")
Last week was going through the "Functional Geekery" podcast archives to hear a bit more about Racket/Scheme lore, here is the list I have so far: Functional Geekery Episode 24 - Matthew Flatt Episode 38 - Dr. Conrad B… --- ## [Checking URLs using get-impure-port](https://racket.discourse.group/t/checking-urls-using-get-impure-port/3599)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 6\ **Last updated:** [March 4, 2025, 4:17am UTC](https://racket.discourse.group/t/checking-urls-using-get-impure-port/3599 "2025-03-04T04:17:14Z")
Oh gee whiz... I have a ten-line program trying to check whether certain documentation URLs are good, and I keep getting "403 Forbidden" results from cloudflare ... even when curl -I works fine with what appears to be th… --- ## [A Multi-Language-Oriented Macro System by Michael Ballantyne at the (fourteenth RacketCon) is now available](https://racket.discourse.group/t/a-multi-language-oriented-macro-system-by-michael-ballantyne-at-the-fourteenth-racketcon-is-now-available/3254)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 11\ **Last updated:** [March 3, 2025, 11:11pm UTC](https://racket.discourse.group/t/a-multi-language-oriented-macro-system-by-michael-ballantyne-at-the-fourteenth-racketcon-is-now-available/3254 "2025-03-03T23:11:09Z")
A Multi-Language-Oriented Macro System by Michael Ballantyne at the (fourteenth RacketCon) is now available on the Racket YouTube channel at https://youtu.be/KHxZ3mT9BSo -- (fourteenth RacketCon) playlist [Previous page](https://racket.discourse.group/c/general/12.md?page=4) [Next page](https://racket.discourse.group/c/general/12.md?page=6)