# General **URL:** https://racket.discourse.group/c/general/12.md?page=12 [Latest](https://racket.discourse.group/latest.md) · [Categories](https://racket.discourse.group/categories.md) · [Tags](https://racket.discourse.group/tags.md) **Page:** 13 --- ## [\[Call for nominations\] PLDI ’24 Artifact Evaluation Committee](https://racket.discourse.group/t/call-for-nominations-pldi-24-artifact-evaluation-committee/2601)
**Author:** [@liyao](https://racket.discourse.group/u/liyao)\ **Replies:** 0\ **Last updated:** [December 13, 2023, 6:06pm UTC](https://racket.discourse.group/t/call-for-nominations-pldi-24-artifact-evaluation-committee/2601 "2023-12-13T18:06:06Z")
Dear all, We are looking for motivated students and researchers to be members of the PLDI 2024 Artifact Evaluation Committee (AEC). The artifact evaluation process aims to promote, share and catalog the research artifac… --- ## [Weirdly slow subprocess-wait?](https://racket.discourse.group/t/weirdly-slow-subprocess-wait/2512)
**Author:** [@tonyg](https://racket.discourse.group/u/tonyg)\ **Replies:** 1\ **Last updated:** [December 12, 2023, 1:28am UTC](https://racket.discourse.group/t/weirdly-slow-subprocess-wait/2512 "2023-12-12T01:28:57Z")
Hi all, Some time in the past, oh, year?, some inscrutable subset of my various machines' Racket installations have consistently started taking between 250ms and 300ms to execute a subprocess, even one as simple as /usr… --- ## [Imports as completion candidates for hash-langs](https://racket.discourse.group/t/imports-as-completion-candidates-for-hash-langs/2511)
**Author:** [@greghendershott](https://racket.discourse.group/u/greghendershott)\ **Replies:** 36\ **Last updated:** [December 11, 2023, 4:36pm UTC](https://racket.discourse.group/t/imports-as-completion-candidates-for-hash-langs/2511 "2023-12-11T16:36:02Z")
Given #lang rhombus imp with the cursor after "imp", if I either In DrRacket: Press C-/. In Emacs, with racket-xp-mode enabled: Press TAB (or trigger complete-symbol in some other manual or automatic way). then the… --- ## [Ubuntu Linux + Racket 8.10 snap + Emacs racket-mode](https://racket.discourse.group/t/ubuntu-linux-racket-8-10-snap-emacs-racket-mode/2263)
**Author:** [@alexh](https://racket.discourse.group/u/alexh)\ **Replies:** 16\ **Last updated:** [December 1, 2023, 10:33pm UTC](https://racket.discourse.group/t/ubuntu-linux-racket-8-10-snap-emacs-racket-mode/2263 "2023-12-01T22:33:38Z")
I spent some time figuring out this behavior and I thought it might be useful to others: On an Ubuntu Linux machine, I installed Racket 8.10 as a snap, and everything was working fine, except racket-mode in Emacs. The … --- ## [Racket meet-up: Saturday, 2 December, 2023 at 18:00 UTC](https://racket.discourse.group/t/racket-meet-up-saturday-2-december-2023-at-18-00-utc/2458)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [November 30, 2023, 7:15pm UTC](https://racket.discourse.group/t/racket-meet-up-saturday-2-december-2023-at-18-00-utc/2458 "2023-11-30T19:15:44Z")
Racket meet-up: Saturday, 2 December, 2023 at 18:00 UTC In your timezone: 2023-12-02T18:00:00Z (UTC). (converter) At this meet-up: Show and tell News & rumours AOB This meet-up will be held at https://meet.jit.si/Rac… --- ## [\[TFP 2024 Final Call for Papers\] 25th International Symposium on Trends in Functional Programming](https://racket.discourse.group/t/tfp-2024-final-call-for-papers-25th-international-symposium-on-trends-in-functional-programming/2553)
**Author:** [@peter88](https://racket.discourse.group/u/peter88)\ **Replies:** 0\ **Last updated:** [November 30, 2023, 9:55am UTC](https://racket.discourse.group/t/tfp-2024-final-call-for-papers-25th-international-symposium-on-trends-in-functional-programming/2553 "2023-11-30T09:55:12Z")
TFP 2024 -- Call for Papers (trendsfp.github.io) Important Dates Submission deadline: pre-symposium, full papers, Saturday 4 November, 2023 (AOE) Submission deadline: pre-symposium, draft papers, Friday 8 December, … --- ## [Fig: Simple and Extensible Configuration](https://racket.discourse.group/t/fig-simple-and-extensible-configuration/2551)
**Author:** [@micah\_cantor](https://racket.discourse.group/u/micah_cantor)\ **Replies:** 1\ **Last updated:** [November 29, 2023, 10:42pm UTC](https://racket.discourse.group/t/fig-simple-and-extensible-configuration/2551 "2023-11-29T22:42:56Z")
Hi everyone, I released a tiny #lang for configuration: Fig is a domain-specific language for composing configuration files. Fig is a super-set of JSON with some additional features to reduce repetition and increase cor… --- ## [Lexer matching case insensitive](https://racket.discourse.group/t/lexer-matching-case-insensitive/2543)
**Author:** [@ceving](https://racket.discourse.group/u/ceving)\ **Replies:** 2\ **Last updated:** [November 27, 2023, 3:01pm UTC](https://racket.discourse.group/t/lexer-matching-case-insensitive/2543 "2023-11-27T15:01:22Z")
The original SRE specification contains the definition of uncase: UNCASE is a regexp operator producing a regexp that matches any case permutation of any string that matches (: \ ...). For example, the regexp (u… --- ## [\# Racket Leaderboard for Advent of Code 2023](https://racket.discourse.group/t/racket-leaderboard-for-advent-of-code-2023/2542)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [November 26, 2023, 10:03pm UTC](https://racket.discourse.group/t/racket-leaderboard-for-advent-of-code-2023/2542 "2023-11-26T22:03:54Z")
Racket Leaderboard for Advent of Code 2023 https://adventofcode.com/2023/leaderboard/private/view/22197 Join code 22197-a7a01707 The first puzzles will unlock on December 1st at midnight EST (UTC-5). Discuss on https:… --- ## [Racket leaderboard for advent of code?](https://racket.discourse.group/t/racket-leaderboard-for-advent-of-code/2538)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [November 26, 2023, 3:59pm UTC](https://racket.discourse.group/t/racket-leaderboard-for-advent-of-code/2538 "2023-11-26T15:59:37Z")
Is advent of code happening this year? Does the Racket Leaderboard have the same code as previous years? --- ## [Racket languages showcase! Nominate a language!](https://racket.discourse.group/t/racket-languages-showcase-nominate-a-language/2536)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [November 26, 2023, 9:01am UTC](https://racket.discourse.group/t/racket-languages-showcase-nominate-a-language/2536 "2023-11-26T09:01:58Z")
I'd like to see a list of Racket languages on the Racket website to give people an idea of the power and possibilities for creating programming languages in Racket. You can search for #lang's in the Racket documentation… --- ## [Class with static fields](https://racket.discourse.group/t/class-with-static-fields/2530)
**Author:** [@ceving](https://racket.discourse.group/u/ceving)\ **Replies:** 3\ **Last updated:** [November 24, 2023, 12:59am UTC](https://racket.discourse.group/t/class-with-static-fields/2530 "2023-11-24T00:59:14Z")
What is Rackets canonical way to define fields called in other languages "static", which means the value is shared among all instances of the class. I can use a closure, but I can not access the value without an object: … --- ## [Why does my code not work? How can I fix it?](https://racket.discourse.group/t/why-does-my-code-not-work-how-can-i-fix-it/2489)
**Author:** [@Jack22](https://racket.discourse.group/u/Jack22)\ **Replies:** 6\ **Last updated:** [November 11, 2023, 6:57pm UTC](https://racket.discourse.group/t/why-does-my-code-not-work-how-can-i-fix-it/2489 "2023-11-11T18:57:56Z")
(define (brew-time grams) (define water (\* 100 (/ grams 6))) (cond \[(\< water 100) (error 'brew-time "Zu geringe Menge")\] \[(\> water 800) (error 'brew-time "Zu grosse Menge")\] \[(= water 100) 60\] \[(… --- ## [Install racket-turtle](https://racket.discourse.group/t/install-racket-turtle/2483)
**Author:** [@rack\_a\_jack](https://racket.discourse.group/u/rack_a_jack)\ **Replies:** 15\ **Last updated:** [November 10, 2023, 7:27pm UTC](https://racket.discourse.group/t/install-racket-turtle/2483 "2023-11-10T19:27:18Z")
hello, would like to install racket-turtle.rkt teachpack. I have the teachpack folder. Should it be in a particular directiory? completely new to racket, have a few questions to get started thank you --- ## [Where can I see the RacketCon day 1 livestream?](https://racket.discourse.group/t/where-can-i-see-the-racketcon-day-1-livestream/2468)
**Author:** [@dstorrs](https://racket.discourse.group/u/dstorrs)\ **Replies:** 5\ **Last updated:** [November 8, 2023, 3:11am UTC](https://racket.discourse.group/t/where-can-i-see-the-racketcon-day-1-livestream/2468 "2023-11-08T03:11:09Z")
https://con.racket-lang.org/ currently has the day 2 livestream. Is the day 1 available anywhere? Also, is it possible to download copies of the talks? --- ## [Code formatting with source locations?](https://racket.discourse.group/t/code-formatting-with-source-locations/2459)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 3\ **Last updated:** [November 6, 2023, 4:31pm UTC](https://racket.discourse.group/t/code-formatting-with-source-locations/2459 "2023-11-06T16:31:38Z")
A bug report from @LiberalArtist about the printing of fractions in the stepper has me thinking; the way that the stepper renders code is very fragile, and I'm wondering whether recent work on formatting would make it po… --- ## [Racket Community on X (née Twitter)](https://racket.discourse.group/t/racket-community-on-x-nee-twitter/2433)
**Author:** [@Julio](https://racket.discourse.group/u/Julio)\ **Replies:** 3\ **Last updated:** [November 5, 2023, 12:52pm UTC](https://racket.discourse.group/t/racket-community-on-x-nee-twitter/2433 "2023-11-05T12:52:23Z")
Are you on X (formerly known as Twitter)? Well there is now a Racket Community! :racket: Come on in and start sharing posts about the awesomeness that is Racket :racket\_heart: https://x.com/i/communities/17176631724027… --- ## [Racket meet-up: Saturday, 4 November, 2023 at 18:00 UTC :racket:](https://racket.discourse.group/t/racket-meet-up-saturday-4-november-2023-at-18-00-utc/2451)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [November 2, 2023, 11:40pm UTC](https://racket.discourse.group/t/racket-meet-up-saturday-4-november-2023-at-18-00-utc/2451 "2023-11-02T23:40:59Z")
Racket meet-up: Saturday, 4 November, 2023 at 18:00 UTC In your timezone: 2023-11-04T18:00:00Z (UTC). (converter) At this meet-up: RacketCon Show and tell News & rumours AOB This meet-up will be held at https://meet.… --- ## [How to include "./scribblings/some-file.html" in compiled binary tarball](https://racket.discourse.group/t/how-to-include-scribblings-some-file-html-in-compiled-binary-tarball/2424)
**Author:** [@hrvoje064](https://racket.discourse.group/u/hrvoje064)\ **Replies:** 5\ **Last updated:** [October 28, 2023, 4:01am UTC](https://racket.discourse.group/t/how-to-include-scribblings-some-file-html-in-compiled-binary-tarball/2424 "2023-10-28T04:01:28Z")
This problem appeared when I included scribble (html) documentation in my math-quiz program. When I run the program from the main.rkt file, everything works OK, but when I compile it (for distribution to other machines),… --- ## [Does Anyone want to Collaborate on a "Big" Project to Show Racket Can Work in Production?](https://racket.discourse.group/t/does-anyone-want-to-collaborate-on-a-big-project-to-show-racket-can-work-in-production/2284)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 23\ **Last updated:** [October 25, 2023, 5:55pm UTC](https://racket.discourse.group/t/does-anyone-want-to-collaborate-on-a-big-project-to-show-racket-can-work-in-production/2284 "2023-10-25T17:55:02Z")
There is an interesting call to action on the Racket subreddit that would be better placed here where Racket discussion is more active: Does Anyone want to Collaborate on a "Big" Project to Show Racket Can Work in Produ… --- ## [On Learning Compilers and Creating Programming Languages](https://racket.discourse.group/t/on-learning-compilers-and-creating-programming-languages/2420)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [October 25, 2023, 11:08am UTC](https://racket.discourse.group/t/on-learning-compilers-and-creating-programming-languages/2420 "2023-10-25T11:08:15Z")
Interesting blog post On Learning Compilers and Creating Programming Languages. I like that it separates the two topics in a way that I have not seen in online forums. One of the more popular languages that I know of … --- ## [Are you ready for RacketCon?](https://racket.discourse.group/t/are-you-ready-for-racketcon/2403)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [October 24, 2023, 9:45pm UTC](https://racket.discourse.group/t/are-you-ready-for-racketcon/2403 "2023-10-24T21:45:55Z")
Are you ready for RacketCon? We are! Support you favourite Programmable Programming Language conference and get your tickets at RacketCon 2023 Tickets, Sat, Oct 28, 2023 at 8:30 AM | Eventbrite (live stream only $1… --- ## [Generating Conforming Programs with Xsmith \[SPLASH'23\]](https://racket.discourse.group/t/generating-conforming-programs-with-xsmith-splash23/2415)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [October 23, 2023, 3:11pm UTC](https://racket.discourse.group/t/generating-conforming-programs-with-xsmith-splash23/2415 "2023-10-23T15:11:52Z")
Generating Conforming Programs with Xsmith \[SPLASH'23\] Talk at SPLASH'23: https://www.youtube.com/watch?v=6zqOM4rez5M&t=10754s Paper: https://willghatch.net/publications/xsmith-gpce-2023-preprint.pdf from the abstract: … --- ## [Racket is now on Instagram](https://racket.discourse.group/t/racket-is-now-on-instagram/2413)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [October 23, 2023, 1:29pm UTC](https://racket.discourse.group/t/racket-is-now-on-instagram/2413 "2023-10-23T13:29:14Z")
Racket is now on Instagram at https://www.instagram.com/racketlang/ Racket has a presence on many social media platforms due to the diversity of the people who use Racket. Look here to find one that suits you: Racket on… --- ## [Set!: cannot mutate module-required identifier](https://racket.discourse.group/t/set-cannot-mutate-module-required-identifier/2411)
**Author:** [@damien\_mattei](https://racket.discourse.group/u/damien_mattei)\ **Replies:** 1\ **Last updated:** [October 22, 2023, 7:57pm UTC](https://racket.discourse.group/t/set-cannot-mutate-module-required-identifier/2411 "2023-10-22T19:57:24Z")
i have a module that contains a single variable: (module infix-operators racket (provide infix-operators-lst) (include "exponential.scm") (include "modulo.scm") (include "bitwise.rkt") (include "not-equal.scm") … --- ## [FFI Program not working on Mac](https://racket.discourse.group/t/ffi-program-not-working-on-mac/2400)
**Author:** [@SamPhillips](https://racket.discourse.group/u/SamPhillips)\ **Replies:** 9\ **Last updated:** [October 19, 2023, 2:36pm UTC](https://racket.discourse.group/t/ffi-program-not-working-on-mac/2400 "2023-10-19T14:36:26Z")
Hi, This program works on Linux and fetches the web page, but on Mac it fails. Doing some small sleuthing it appears to not be able to parse the URL, but I do not understand how setting the URL is failing. Mac M1 Mont… --- ## [The 2023 Racket Summer Event](https://racket.discourse.group/t/the-2023-racket-summer-event/2191)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 8\ **Last updated:** [October 18, 2023, 12:51am UTC](https://racket.discourse.group/t/the-2023-racket-summer-event/2191 "2023-10-18T00:51:37Z")
The 2023 Racket Summer Event This years theme is ‘racket examples’! The task is create an example - code and description - of a feature or algorithm. Entry Categories There will be two categories: Small to medium exam… --- ## [Douglas Crockford, author of ‘Javascript: the good parts’ and ‘How Javascript works’ will be giving the keynote presentation ‘From Here To Lambda And Back Again’ at the thirteenth RacketCon](https://racket.discourse.group/t/douglas-crockford-author-of-javascript-the-good-parts-and-how-javascript-works-will-be-giving-the-keynote-presentation-from-here-to-lambda-and-back-again-at-the-thirteenth-racketcon/2392)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [October 16, 2023, 9:26am UTC](https://racket.discourse.group/t/douglas-crockford-author-of-javascript-the-good-parts-and-how-javascript-works-will-be-giving-the-keynote-presentation-from-here-to-lambda-and-back-again-at-the-thirteenth-racketcon/2392 "2023-10-16T09:26:35Z")
:racket:​ Douglas Crockford, author of ‘Javascript: the good parts’ and ‘How Javascript works’ will be giving the keynote presentation From Here To Lambda And Back Again at the thirteenth RacketCon :racket:​ Come join u… --- ## [A micro-benchmark](https://racket.discourse.group/t/a-micro-benchmark/2347)
**Author:** [@lewisl](https://racket.discourse.group/u/lewisl)\ **Replies:** 68\ **Last updated:** [October 13, 2023, 9:59am UTC](https://racket.discourse.group/t/a-micro-benchmark/2347 "2023-10-13T09:59:53Z")
Micro-Benchmark of Summing a Floating Point Vector Take this with a grain of salt. All micro-benchmarks are fraught; it's easier to do wrong than to do correctly. Please correct anything I have done incorrectly or sugges… --- ## [Check-syntax occasional confusion](https://racket.discourse.group/t/check-syntax-occasional-confusion/2376)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 2\ **Last updated:** [October 11, 2023, 3:33am UTC](https://racket.discourse.group/t/check-syntax-occasional-confusion/2376 "2023-10-11T03:33:33Z")
In this screenshot, the green oval is highlighting something that is clearly not an identifier. Things like this are much more common for me recently (maybe just this latest version?). Are any of y'all seeing things like… [Previous page](https://racket.discourse.group/c/general/12.md?page=11) [Next page](https://racket.discourse.group/c/general/12.md?page=13)