# General **URL:** https://racket.discourse.group/c/general/12.md?page=3 [Latest](https://racket.discourse.group/latest.md) · [Categories](https://racket.discourse.group/categories.md) · [Tags](https://racket.discourse.group/tags.md) **Page:** 4 --- ## [Multiple Fixed-Point Combinators](https://racket.discourse.group/t/multiple-fixed-point-combinators/4020)
**Author:** [@bakgatviooldoos](https://racket.discourse.group/u/bakgatviooldoos)\ **Replies:** 0\ **Last updated:** [November 22, 2025, 11:52pm UTC](https://racket.discourse.group/t/multiple-fixed-point-combinators/4020 "2025-11-22T23:52:19Z")
Hi, Racket Discourse. I have been looking at the bruijn language lately because it has such a nice syntax. I'd encourage any curious readers to take a look, the author is doing some interesting things. In any case, in … --- ## [Interaction with a reader in scribble](https://racket.discourse.group/t/interaction-with-a-reader-in-scribble/4014)
**Author:** [@damien\_mattei](https://racket.discourse.group/u/damien_mattei)\ **Replies:** 7\ **Last updated:** [November 20, 2025, 5:28pm UTC](https://racket.discourse.group/t/interaction-with-a-reader-in-scribble/4014 "2025-11-20T17:28:49Z")
Hi, is it possible to use interaction in scribble with a reader?, example of what i mean: #lang scribble/manual @(require scribble/core) @(require scribble/eval) @interaction\[ #lang reader SRFI-105 (require Scheme+) {… --- ## [Testing updated dynamic libs (win-x64, win-x86) in Racket](https://racket.discourse.group/t/testing-updated-dynamic-libs-win-x64-win-x86-in-racket/4005)
**Author:** [@ndykman](https://racket.discourse.group/u/ndykman)\ **Replies:** 5\ **Last updated:** [November 20, 2025, 2:56am UTC](https://racket.discourse.group/t/testing-updated-dynamic-libs-win-x64-win-x86-in-racket/4005 "2025-11-20T02:56:30Z")
Didn't know if this was appropriate for the internals list, so it is here. This work was based on a snapshot download of Racket 9.0.0.4. Racket builds on with MSVC (VS Build Tools 2022) with little problem. This is nic… --- ## [Unable to reach racket-lang.org](https://racket.discourse.group/t/unable-to-reach-racket-lang-org/4011)
**Author:** [@damien\_mattei](https://racket.discourse.group/u/damien_mattei)\ **Replies:** 4\ **Last updated:** [November 18, 2025, 3:02pm UTC](https://racket.discourse.group/t/unable-to-reach-racket-lang-org/4011 "2025-11-18T15:02:31Z")
Hi, i was trying to install a mandatory package for work on a new host but can not. It seems someting does not works, perheaps with cloudflare in France? see screenshot: Best regards, --- ## [Classifying broadcasting in math/array, and a question about array-append\* and array-list-\>array](https://racket.discourse.group/t/classifying-broadcasting-in-math-array-and-a-question-about-array-append-and-array-list-array/3999)
**Author:** [@Gambiteer](https://racket.discourse.group/u/Gambiteer)\ **Replies:** 0\ **Last updated:** [November 8, 2025, 1:25am UTC](https://racket.discourse.group/t/classifying-broadcasting-in-math-array-and-a-question-about-array-append-and-array-list-array/3999 "2025-11-08T01:25:30Z")
I think I can classify the purpose of array broadcasting in almost every routine in math/array that uses it, and can compare it with the use in Python's NumPy library (of which I am also no expert). array-map: The basic… --- ## [Multi-argument array folds, array-for-each in math/array?](https://racket.discourse.group/t/multi-argument-array-folds-array-for-each-in-math-array/3998)
**Author:** [@Gambiteer](https://racket.discourse.group/u/Gambiteer)\ **Replies:** 2\ **Last updated:** [November 7, 2025, 11:01pm UTC](https://racket.discourse.group/t/multi-argument-array-folds-array-for-each-in-math-array/3998 "2025-11-07T23:01:55Z")
I've scoured the documentation and source code for math/array and couldn't find a procedure I would call array-for-each, or multi-array argument array-folds. (My motivation is to track down all procedures in math/array … --- ## [Custom highlighting scheme](https://racket.discourse.group/t/custom-highlighting-scheme/2887)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 20\ **Last updated:** [November 7, 2025, 9:06am UTC](https://racket.discourse.group/t/custom-highlighting-scheme/2887 "2025-11-07T09:06:56Z")
Reposted with permission: a student here at Cal Poly wasn't overwhelmingly happy with the default color schemes, came up with this one instead: Here's the source: edit-\>preferences-\>color-\> Background tab Backgro… --- ## [Ending 32 bit support for Racket (and updating third-party libraries)](https://racket.discourse.group/t/ending-32-bit-support-for-racket-and-updating-third-party-libraries/3986)
**Author:** [@ndykman](https://racket.discourse.group/u/ndykman)\ **Replies:** 11\ **Last updated:** [November 6, 2025, 7:21am UTC](https://racket.discourse.group/t/ending-32-bit-support-for-racket-and-updating-third-party-libraries/3986 "2025-11-06T07:21:43Z")
I didn't see an explicit issue around this and I apologize if this is kicking up a hornets' nest (and it probably is), but this seems long overdue. For users that really need 32 bit support, maintaining a fork seems lik… --- ## [What's the deal with \`X . op . Y\`?](https://racket.discourse.group/t/whats-the-deal-with-x-op-y/3400)
**Author:** [@bakgatviooldoos](https://racket.discourse.group/u/bakgatviooldoos)\ **Replies:** 13\ **Last updated:** [November 4, 2025, 10:18pm UTC](https://racket.discourse.group/t/whats-the-deal-with-x-op-y/3400 "2025-11-04T22:18:03Z")
Hi, Racket Discourse. I have some free time this morning, so I thought I'd ask your opinion on using the "infix" form of application, namely (f x y) -\> (x . f . y), and maybe waste your time enjoyably. Personally, I am… --- ## [‘3D syntax’ explanation](https://racket.discourse.group/t/3d-syntax-explanation/3995)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [November 4, 2025, 8:58am UTC](https://racket.discourse.group/t/3d-syntax-explanation/3995 "2025-11-04T08:58:05Z")
Hi ‘3D syntax’ came up in the discord recently and Jade Sailor kindly provided an explanation and example: 3d syntax is when a syntax object is programmatically constructed to contain something which doesn't have a… --- ## [Call for Contributions: BOB 2026 (Berlin, March 13 - Deadline Nov 17)](https://racket.discourse.group/t/call-for-contributions-bob-2026-berlin-march-13-deadline-nov-17/3961)
**Author:** [@mike](https://racket.discourse.group/u/mike)\ **Replies:** 1\ **Last updated:** [November 3, 2025, 12:32pm UTC](https://racket.discourse.group/t/call-for-contributions-bob-2026-berlin-march-13-deadline-nov-17/3961 "2025-11-03T12:32:57Z")
We'd love Racket at BOB! BOB Conference 2026 - Call for Contributions "What happens when we use what's best for a change?" https://bobkonf.de/2026/cfc.html Berlin, Mar 13 Deadline: November 17, 2025 Looking for Speake… --- ## [Developing/improving security sandboxes with Racket](https://racket.discourse.group/t/developing-improving-security-sandboxes-with-racket/3976)
**Author:** [@vinipsmaker](https://racket.discourse.group/u/vinipsmaker)\ **Replies:** 8\ **Last updated:** [October 30, 2025, 4:14pm UTC](https://racket.discourse.group/t/developing-improving-security-sandboxes-with-racket/3976 "2025-10-30T16:14:49Z")
Hi all, I'm new here. So sandboxes can be used to run untrusted code and buggy code that potentially goes "rogue" once the right bug is exploited. They're specially useful to run old code against untrusted input (e.g. f… --- ## [\[TFP 2026\] 2nd Call for Papers for the 27th International Symposium on Trends in Functional Programming, Odense, Denmark, January 27-30 2026](https://racket.discourse.group/t/tfp-2026-2nd-call-for-papers-for-the-27th-international-symposium-on-trends-in-functional-programming-odense-denmark-january-27-30-2026/3993)
**Author:** [@peter88](https://racket.discourse.group/u/peter88)\ **Replies:** 0\ **Last updated:** [October 30, 2025, 9:43am UTC](https://racket.discourse.group/t/tfp-2026-2nd-call-for-papers-for-the-27th-international-symposium-on-trends-in-functional-programming-odense-denmark-january-27-30-2026/3993 "2025-10-30T09:43:55Z")
TFP 2026 – Second Call for Papers (trendsfp.github.io) Important Dates Submission deadline (pre-symposium, full papers): Thu 13th Nov 2025 (AOE) Notification (pre-symposium, full papers): Thu 11th Dec 2025 Subm… --- ## [The end of BC downloads?](https://racket.discourse.group/t/the-end-of-bc-downloads/3734)
**Author:** [@mflatt](https://racket.discourse.group/u/mflatt)\ **Replies:** 8\ **Last updated:** [October 26, 2025, 6:06pm UTC](https://racket.discourse.group/t/the-end-of-bc-downloads/3734 "2025-10-26T18:06:51Z")
We're overhauling the Racket installer builds for the main download site (after the upcoming v8.17) and snapshot sites (sooner). One question is how much to keep building installers for the old BC variant of Racket. The … --- ## [Call for Papers: Symposium on Functional and Logic Programming (May 26-28, Akita, Japan)](https://racket.discourse.group/t/call-for-papers-symposium-on-functional-and-logic-programming-may-26-28-akita-japan/3921)
**Author:** [@mike](https://racket.discourse.group/u/mike)\ **Replies:** 1\ **Last updated:** [October 26, 2025, 12:41pm UTC](https://racket.discourse.group/t/call-for-papers-symposium-on-functional-and-logic-programming-may-26-28-akita-japan/3921 "2025-10-26T12:41:49Z")
18th International Symposium on Functional and Logic Programming May 26-28, 2026, Akita, Japan FLOPS aims to bring together practitioners, researchers and implementers of declarative programming, to discuss mutually int… --- ## [How Cloudflare Uses Racket and Rosette to Verify DNS Changes](https://racket.discourse.group/t/how-cloudflare-uses-racket-and-rosette-to-verify-dns-changes/3983)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [October 25, 2025, 9:05pm UTC](https://racket.discourse.group/t/how-cloudflare-uses-racket-and-rosette-to-verify-dns-changes/3983 "2025-10-25T21:05:57Z")
How Cloudflare Uses Racket and Rosette to Verify DNS Changes Keynote presentation by James Larisch and Suleman Ahmad at (fifteenth RacketCon) October 4-5, 2025 UMass Boston https://youtu.be/7Twlh-Opq5E (M… --- ## [Help test via snapshots: parallel threads](https://racket.discourse.group/t/help-test-via-snapshots-parallel-threads/3920)
**Author:** [@mflatt](https://racket.discourse.group/u/mflatt)\ **Replies:** 24\ **Last updated:** [October 25, 2025, 12:19pm UTC](https://racket.discourse.group/t/help-test-via-snapshots-parallel-threads/3920 "2025-10-25T12:19:28Z")
We expect that the next Racket release (tentatively v9.0) will have additional support for parallelism. We need your help to get it right. Racket has always provided lightweight threads for concurrency, but Racket threa… --- ## [Arrays proposal: Help to write idiomatic typed math/array example](https://racket.discourse.group/t/arrays-proposal-help-to-write-idiomatic-typed-math-array-example/3972)
**Author:** [@Gambiteer](https://racket.discourse.group/u/Gambiteer)\ **Replies:** 6\ **Last updated:** [October 21, 2025, 8:47pm UTC](https://racket.discourse.group/t/arrays-proposal-help-to-write-idiomatic-typed-math-array-example/3972 "2025-10-21T20:47:46Z")
Racket's math/array is a very large library. I'm trying to refine/expand SRFI 231 to a library that is smaller than math/array but with sufficient performance and expressiveness. Examples using array libraries in many … --- ## [TIL how to convert hex triplet to \`racket/draw\` color](https://racket.discourse.group/t/til-how-to-convert-hex-triplet-to-racket-draw-color/3979)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [October 21, 2025, 1:11pm UTC](https://racket.discourse.group/t/til-how-to-convert-hex-triplet-to-racket-draw-color/3979 "2025-10-21T13:11:45Z")
TIL how to convert a hex triplet to racket/draw color ;; Convert hex triplet to \`racket/draw\` color ;; hex-triplet-\>color% : hex -\> colour% (define (hex-triplet-\>color% x) (define-values \[r g b\] (values (arithmeti… --- ## [CS Pictionary!](https://racket.discourse.group/t/cs-pictionary/3975)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [October 18, 2025, 12:39pm UTC](https://racket.discourse.group/t/cs-pictionary/3975 "2025-10-18T12:39:42Z")
A bit of fun happened at the Qi meeting yesterday that can’t wait for the next Qi meeting notes CS Pictionary! What started as a Python script became a Racket version thanks to @SamPhillips and eventually a R16 comm… --- ## [Arrays proposal: New minimal implementation](https://racket.discourse.group/t/arrays-proposal-new-minimal-implementation/3965)
**Author:** [@Gambiteer](https://racket.discourse.group/u/Gambiteer)\ **Replies:** 0\ **Last updated:** [October 7, 2025, 2:19am UTC](https://racket.discourse.group/t/arrays-proposal-new-minimal-implementation/3965 "2025-10-07T02:19:57Z")
At this branch: I've now committed a "minimal" implementation with no specialized code or error checking, and a test program that can be used to test both the small and regular implementations. The stripped-down rout… --- ## [RacketCon 2025 follow-up](https://racket.discourse.group/t/racketcon-2025-follow-up/3964)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [October 6, 2025, 10:45am UTC](https://racket.discourse.group/t/racketcon-2025-follow-up/3964 "2025-10-06T10:45:19Z")
Hope everyone had a great RacketCon. Many thanks to the presenters, participants in-person and remote, the organisers and UMass Boston for hosting us. Please send feedback to the team at con-organizers@racket-lang.org … --- ## [Racket meet-up - RacketCon party 🎉 - Saturday, 4 October 2025 at 17:00 UTC](https://racket.discourse.group/t/racket-meet-up-racketcon-party-saturday-4-october-2025-at-17-00-utc/3963)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 3\ **Last updated:** [October 4, 2025, 9:53am UTC](https://racket.discourse.group/t/racket-meet-up-racketcon-party-saturday-4-october-2025-at-17-00-utc/3963 "2025-10-04T09:53:40Z")
Everyone is welcome to join us for the :racket: Racket meet-up RacketCon party🎉: Saturday, 4 October 2025 at 17:00 UTC. Update: We have moved the meet-up 1 hour earlier so we don't clash with presentations. I’m still … --- ## [RacketCon chat channel](https://racket.discourse.group/t/racketcon-chat-channel/3962)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [October 3, 2025, 10:59am UTC](https://racket.discourse.group/t/racketcon-chat-channel/3962 "2025-10-03T10:59:38Z")
For those attending RacketCon in person or remotely we have a racketcon chat channel on the racket discord at Racket The livestream is free - but the registration page includes an option to register for $10 USD to help … --- ## [Broadcasting, mutability, and non-strict arrays in math/array](https://racket.discourse.group/t/broadcasting-mutability-and-non-strict-arrays-in-math-array/3956)
**Author:** [@Gambiteer](https://racket.discourse.group/u/Gambiteer)\ **Replies:** 3\ **Last updated:** [October 1, 2025, 1:53am UTC](https://racket.discourse.group/t/broadcasting-mutability-and-non-strict-arrays-in-math-array/3956 "2025-10-01T01:53:58Z")
TL;DR version: Applying array broadcasting to mutable or non-strict arrays can be very difficult to reason about, so should one restrict broadcasting to strict, immutable arrays? or ignore the difficulties and learn to … --- ## [Try a quick experiment with Racket 8.14 and macOS Sequoia?](https://racket.discourse.group/t/try-a-quick-experiment-with-racket-8-14-and-macos-sequoia/3177)
**Author:** [@greghendershott](https://racket.discourse.group/u/greghendershott)\ **Replies:** 4\ **Last updated:** [September 25, 2025, 12:40pm UTC](https://racket.discourse.group/t/try-a-quick-experiment-with-racket-8-14-and-macos-sequoia/3177 "2025-09-25T12:40:57Z")
I'm investigating a bug report about Racket Mode's Emacs front end being unable to talk to its Racket back end. But it turns out Emacs isn't a necessary ingredient? It appears there might be an issue with its Racket bac… --- ## [How to Think About Programs the Way Experts Do (UBC TAs)](https://racket.discourse.group/t/how-to-think-about-programs-the-way-experts-do-ubc-tas/3955)
**Author:** [@markshead](https://racket.discourse.group/u/markshead)\ **Replies:** 2\ **Last updated:** [September 24, 2025, 5:33pm UTC](https://racket.discourse.group/t/how-to-think-about-programs-the-way-experts-do-ubc-tas/3955 "2025-09-24T17:33:49Z")
In October, Susan Chung and Matthew Kang have graciously agreed to share some of their experiences as TAs for the Racket-based CPSC110 at the University of British Columbia. If you might be interested, follow the link to… --- ## [Qi Meeting Time Change](https://racket.discourse.group/t/qi-meeting-time-change/3828)
**Author:** [@countvajhula](https://racket.discourse.group/u/countvajhula)\ **Replies:** 3\ **Last updated:** [September 23, 2025, 8:28pm UTC](https://racket.discourse.group/t/qi-meeting-time-change/3828 "2025-09-23T20:28:26Z")
(starting a new thread to use it for all time changes in the future) Hi folks, Please note that there is a time change for the Qi meeting this week, and we will be meeting tomorrow (Thursday instead of Friday), an hour… --- ## [(fifteenth RacketCon) countdown](https://racket.discourse.group/t/fifteenth-racketcon-countdown/3953)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [September 22, 2025, 5:01pm UTC](https://racket.discourse.group/t/fifteenth-racketcon-countdown/3953 "2025-09-22T17:01:10Z")
view this at https://racket.discourse.group/t/fifteenth-racketcon-countdown/3953 This counts down to 8:30am 4 October 2025 https://con.racket-lang.org --- ## [\[TFP 2026\] Call for Papers for the 27th International Symposium on Trends in Functional Programming, Odense, Denmark, January 2026](https://racket.discourse.group/t/tfp-2026-call-for-papers-for-the-27th-international-symposium-on-trends-in-functional-programming-odense-denmark-january-2026/3951)
**Author:** [@peter88](https://racket.discourse.group/u/peter88)\ **Replies:** 0\ **Last updated:** [September 22, 2025, 8:41am UTC](https://racket.discourse.group/t/tfp-2026-call-for-papers-for-the-27th-international-symposium-on-trends-in-functional-programming-odense-denmark-january-2026/3951 "2025-09-22T08:41:29Z")
TFP 2026 -- Call for Papers (trendsfp.github.io) Important Dates Submission deadline (pre-symposium, full papers): Thu 13th Nov 2025 (AOE) Notification (pre-symposium, full papers): Thu 11th Dec 2025 Submission … [Previous page](https://racket.discourse.group/c/general/12.md?page=2) [Next page](https://racket.discourse.group/c/general/12.md?page=4)