# General **URL:** https://racket.discourse.group/c/general/12.md?page=18 [Latest](https://racket.discourse.group/latest.md) · [Categories](https://racket.discourse.group/categories.md) · [Tags](https://racket.discourse.group/tags.md) **Page:** 19 --- ## [\[unofficial\] RacketCon Virtual Saturday!](https://racket.discourse.group/t/unofficial-racketcon-virtual-saturday/1391)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [October 28, 2022, 10:37am UTC](https://racket.discourse.group/t/unofficial-racketcon-virtual-saturday/1391 "2022-10-28T10:37:54Z")
If you are not attending in person you are welcome join us at the \[Unofficial\] RacketCon Virtual Saturday in the Racket Room (gather.town virtual room) You can drop in to the Racket Room at any time on Saturday, plus … --- ## [Racket Slack sign-up](https://racket.discourse.group/t/racket-slack-sign-up/1413)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [October 27, 2022, 11:07am UTC](https://racket.discourse.group/t/racket-slack-sign-up/1413 "2022-10-27T11:07:16Z")
Just found out that free accounts on Heroku are being discontinued: https://blog.heroku.com/next-chapter I note that the self registration for racket.slack.com is at https://racket-slack.herokuapp.com/ ....and it is of… --- ## [Updating the wiki page on creating packages](https://racket.discourse.group/t/updating-the-wiki-page-on-creating-packages/1395)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 3\ **Last updated:** [October 25, 2022, 1:00am UTC](https://racket.discourse.group/t/updating-the-wiki-page-on-creating-packages/1395 "2022-10-25T01:00:29Z")
I’m thinking the wiki page on creating packages needs an update It currently only points to ‘getting started with packages’\[1\] in the docs and ‘Tutorial: Creating a Package’ by Stephen Chang\[2\] What should be added … --- ## [Should we try to bridge chat services?](https://racket.discourse.group/t/should-we-try-to-bridge-chat-services/730)
**Author:** [@simonls](https://racket.discourse.group/u/simonls)\ **Replies:** 10\ **Last updated:** [October 24, 2022, 11:48am UTC](https://racket.discourse.group/t/should-we-try-to-bridge-chat-services/730 "2022-10-24T11:48:18Z")
I am a total noob when it comes to messaging services and setting up bridges between them, also people might have various reasons for not wanting bridges between services. (Bridged messages are often of lesser quality… --- ## [\[TIL\] hash-ref is very fast on hasheq](https://racket.discourse.group/t/til-hash-ref-is-very-fast-on-hasheq/1397)
**Author:** [@Laurent.O](https://racket.discourse.group/u/Laurent.O)\ **Replies:** 5\ **Last updated:** [October 17, 2022, 7:14pm UTC](https://racket.discourse.group/t/til-hash-ref-is-very-fast-on-hasheq/1397 "2022-10-17T19:14:12Z")
Not a question per se, just a positive remark: I was wondering whether hash-ref was fast for fixed large sets of fixnums, or if a custom binary search could do better. Answer: It's plenty fast: it can answer 1 000 000 qu… --- ## [Running Racket in the cloud](https://racket.discourse.group/t/running-racket-in-the-cloud/878)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 6\ **Last updated:** [October 7, 2022, 3:46pm UTC](https://racket.discourse.group/t/running-racket-in-the-cloud/878 "2022-10-07T15:46:14Z")
Sometimes you are away you preferred machine for running Racket, or maybe you are a student and need to share computing resources. In these scenarios and others it can be useful to have other options. Fortunately there … --- ## [Racket meet-up October 1st at 18:00 UTC :racket:](https://racket.discourse.group/t/racket-meet-up-october-1st-at-18-00-utc/1272)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 5\ **Last updated:** [October 6, 2022, 1:47pm UTC](https://racket.discourse.group/t/racket-meet-up-october-1st-at-18-00-utc/1272 "2022-10-06T13:47:38Z")
Racket meet-up October 1st at 18:00 UTC :racket: At this meet-up: Build your own Lightsaber: Ben Knoble will show us how to configure Vim as a powerful Racket development environment. Show and tell News & rumours AO… --- ## [Education: online vs in-person](https://racket.discourse.group/t/education-online-vs-in-person/1350)
**Author:** [@jestarray](https://racket.discourse.group/u/jestarray)\ **Replies:** 3\ **Last updated:** [October 5, 2022, 9:29pm UTC](https://racket.discourse.group/t/education-online-vs-in-person/1350 "2022-10-05T21:29:25Z")
Since a sizable chunk of the Racket community are teachers and academics, what are the pros and cons of online instruction? What do the stats tell? Are students doing better in-person or online(compared to previous semes… --- ## [Compiling Racket to LLVM](https://racket.discourse.group/t/compiling-racket-to-llvm/1336)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 3\ **Last updated:** [September 30, 2022, 3:52pm UTC](https://racket.discourse.group/t/compiling-racket-to-llvm/1336 "2022-09-30T15:52:28Z")
I found myself in a conversation today with Adam Perlin about compiling racket to LLVM, and I found myself wondering why there was no LLVM back-end for Racket\[\*\]. After thinking about it for a while, I decided that the m… --- ## [Speed-up issue with futures (CS)](https://racket.discourse.group/t/speed-up-issue-with-futures-cs/1328)
**Author:** [@Laurent.O](https://racket.discourse.group/u/Laurent.O)\ **Replies:** 12\ **Last updated:** [September 28, 2022, 6:55am UTC](https://racket.discourse.group/t/speed-up-issue-with-futures-cs/1328 "2022-09-28T06:55:08Z")
I have a naive softmax-like function that is decently sped-up by futures (10x on the machine I'm using), but is numerically unstable. When I try to use the standard "subtract the max" trick, it does become stable, but fu… --- ## [Open .rkt files in gedit (linux mint)](https://racket.discourse.group/t/open-rkt-files-in-gedit-linux-mint/1324)
**Author:** [@j831526](https://racket.discourse.group/u/j831526)\ **Replies:** 2\ **Last updated:** [September 25, 2022, 6:05pm UTC](https://racket.discourse.group/t/open-rkt-files-in-gedit-linux-mint/1324 "2022-09-25T18:05:00Z")
When I open a .rkt file there is no markup on the source; it's all white. If I tell gedit it's a scheme file, I get the markup, but gedit doesn't seem to have an option for recognizing racket source file:( --- ## [Rackunit and pict](https://racket.discourse.group/t/rackunit-and-pict/1306)
**Author:** [@bremner](https://racket.discourse.group/u/bremner)\ **Replies:** 4\ **Last updated:** [September 20, 2022, 12:02pm UTC](https://racket.discourse.group/t/rackunit-and-pict/1306 "2022-09-20T12:02:52Z")
I've been introducing students to racket using slideshow (based roughly on the Quick tutorial), and we just started talking about rackunit. Naturally the question of how to test slideshow programs came up. I'm not sur… --- ## [Friday hackathon at RacketCon](https://racket.discourse.group/t/friday-hackathon-at-racketcon/1317)
**Author:** [@jesse](https://racket.discourse.group/u/jesse)\ **Replies:** 0\ **Last updated:** [September 20, 2022, 11:37am UTC](https://racket.discourse.group/t/friday-hackathon-at-racketcon/1317 "2022-09-20T11:37:50Z")
We're getting ever closer to RacketCon! Recall that this year, we're trying, as an experiment, having an additional block of time for hackathons. We've penciled in the afternoon of Friday, October 28 for this purpose. It… --- ## [Debugging infinite loops and rackunit](https://racket.discourse.group/t/debugging-infinite-loops-and-rackunit/1307)
**Author:** [@bremner](https://racket.discourse.group/u/bremner)\ **Replies:** 0\ **Last updated:** [September 17, 2022, 12:52pm UTC](https://racket.discourse.group/t/debugging-infinite-loops-and-rackunit/1307 "2022-09-17T12:52:23Z")
I'm running Racket 8.6 \[CS\] on Debian The following program has an infinite loop in it which makes it a bit of challenge for the DrRacket debugger. It is interruptible from the normal run (F5) but not from hitting "Go… --- ## [Rename to identifier with spaces, yay](https://racket.discourse.group/t/rename-to-identifier-with-spaces-yay/1292)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 13\ **Last updated:** [September 16, 2022, 11:41am UTC](https://racket.discourse.group/t/rename-to-identifier-with-spaces-yay/1292 "2022-09-16T11:41:54Z")
Today, just for fun, I used DrRacket's "rename identifier" to rename the identifier "foo" to "foo 123". It cheerfully did the replacement, including spaces. I should file this as a bug, yes? --- ## [RacketCon 2022: COVID-19 policy](https://racket.discourse.group/t/racketcon-2022-covid-19-policy/1282)
**Author:** [@jesse](https://racket.discourse.group/u/jesse)\ **Replies:** 0\ **Last updated:** [September 7, 2022, 1:39pm UTC](https://racket.discourse.group/t/racketcon-2022-covid-19-policy/1282 "2022-09-07T13:39:34Z")
There was a question in Discord whether RacketCon 2022 has a COVID-19 policy. The short answer is: yes. In detail: The event will take place under the policy in place at our venue, Brown University. Please take a look at… --- ## [Is there an "Instructor's manual" for "How to Design Programs"](https://racket.discourse.group/t/is-there-an-instructors-manual-for-how-to-design-programs/1276)
**Author:** [@jgomo3](https://racket.discourse.group/u/jgomo3)\ **Replies:** 1\ **Last updated:** [September 6, 2022, 2:58pm UTC](https://racket.discourse.group/t/is-there-an-instructors-manual-for-how-to-design-programs/1276 "2022-09-06T14:58:41Z")
I'm preparing myself to eventually teach programming using this book as the foundation, by reading it end to end. So I wonder if a document aimed to instructors exists. --- ## [Racket meet-up September 3rd at 18:00 UTC :racket:](https://racket.discourse.group/t/racket-meet-up-september-3rd-at-18-00-utc/1243)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 5\ **Last updated:** [September 3, 2022, 8:17pm UTC](https://racket.discourse.group/t/racket-meet-up-september-3rd-at-18-00-utc/1243 "2022-09-03T20:17:44Z")
Racket meet-up September 3rd at 18:00 UTC :racket: Meet-up time at your location: 2022-09-03T18:00:00Z (UTC) Online In the Gather Town 'Racket Room': https://gather.town/app/wH1EDG3McffLjrs0/racket-users When: First… --- ## [Racket 8.6 in package repositories](https://racket.discourse.group/t/racket-8-6-in-package-repositories/1234)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [August 16, 2022, 1:07pm UTC](https://racket.discourse.group/t/racket-8-6-in-package-repositories/1234 "2022-08-16T13:07:50Z")
Racket is available from a variety of package repositories but they are not always kept up-to-date. The good news is thanks to a number of very kind and hardworking maintainers a number of package repositories have … --- ## [Shared libraries that depend on each other?](https://racket.discourse.group/t/shared-libraries-that-depend-on-each-other/1037)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 10\ **Last updated:** [August 11, 2022, 7:42pm UTC](https://racket.discourse.group/t/shared-libraries-that-depend-on-each-other/1037 "2022-08-11T19:42:19Z")
WARNING: this question might very well have not a lot to do with Racket. We'll see. I'm working with a student, Alex MacLean, who's developing racket bindings for OpenFST. You can see the current version on the package … --- ## [Research Papers](https://racket.discourse.group/t/research-papers/1220)
**Author:** [@simonls](https://racket.discourse.group/u/simonls)\ **Replies:** 1\ **Last updated:** [August 10, 2022, 11:13pm UTC](https://racket.discourse.group/t/research-papers/1220 "2022-08-10T23:13:25Z")
I am not an academic and I haven't read many papers, however sometimes I have and gotten different insights about some topics, getting a new perspective is enjoyable (if the paper in questions turns out to be easy to fol… --- ## [Racket community online](https://racket.discourse.group/t/racket-community-online/1203)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [August 10, 2022, 7:05pm UTC](https://racket.discourse.group/t/racket-community-online/1203 "2022-08-10T19:05:14Z")
I recently tried to work out where racket users communicate online. I thought it was interesting so I’m sharing here. — Places we find racket users. r/Racket has over 6904 subscribers https://twitter.com/racketlang … --- ## [Ubuntu 22.04 libssl 3 migration](https://racket.discourse.group/t/ubuntu-22-04-libssl-3-migration/942)
**Author:** [@evdubs](https://racket.discourse.group/u/evdubs)\ **Replies:** 3\ **Last updated:** [August 10, 2022, 3:23am UTC](https://racket.discourse.group/t/ubuntu-22-04-libssl-3-migration/942 "2022-08-10T03:23:38Z")
I recently upgraded to Ubuntu 22.04. Apparently, with 22.04, libssl has been moved to version 3.0. From that link: As some of you might have surmised, we’re planning to move to OpenSSL 3.0 for 22.04. This new major re… --- ## [Racket meet-up August 6th at 18:00 UTC :racket:](https://racket.discourse.group/t/racket-meet-up-august-6th-at-18-00-utc/1181)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [August 6, 2022, 5:07am UTC](https://racket.discourse.group/t/racket-meet-up-august-6th-at-18-00-utc/1181 "2022-08-06T05:07:13Z")
Racket meet-up August 6th at 18:00 UTC :racket: Meet-up time at your location: 2022-08-06T18:00:00Z (UTC) Online In the Gather Town 'Racket Room': https://gather.town/app/wH1EDG3McffLjrs0/racket-users (thank you to … --- ## [RacketCon 2022: Friday afternoon hackathon planning](https://racket.discourse.group/t/racketcon-2022-friday-afternoon-hackathon-planning/1195)
**Author:** [@jesse](https://racket.discourse.group/u/jesse)\ **Replies:** 0\ **Last updated:** [August 1, 2022, 9:24am UTC](https://racket.discourse.group/t/racketcon-2022-friday-afternoon-hackathon-planning/1195 "2022-08-01T09:24:23Z")
Greetings RacketCon 2022 participant! (Wait, you haven't registered yet? Just go here to register! That way, the rest of this message will make sense.) This year, we're going to have Friday afternoon available to us for… --- ## [What is the best book for learning racket(scheme)?](https://racket.discourse.group/t/what-is-the-best-book-for-learning-racket-scheme/1008)
**Author:** [@devosalain](https://racket.discourse.group/u/devosalain)\ **Replies:** 14\ **Last updated:** [July 22, 2022, 1:29pm UTC](https://racket.discourse.group/t/what-is-the-best-book-for-learning-racket-scheme/1008 "2022-07-22T13:29:52Z")
Probably the most obvious question. Buy do i need a 1000 pager or a 100 pager ? After a book you need to be productive ... --- ## [Functional Geekery Episode 141 - Shriram Krishnamurthi](https://racket.discourse.group/t/functional-geekery-episode-141-shriram-krishnamurthi/1164)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [July 20, 2022, 5:13pm UTC](https://racket.discourse.group/t/functional-geekery-episode-141-shriram-krishnamurthi/1164 "2022-07-20T17:13:36Z")
Functional Geekery Episode 141 - Shriram Krishnamurthi Racket and other things functional programming are discussed The host @Proctor also posted the following list of previous racket related interviews Other Racke… --- ## [Newish Racket videos (that I had not seen before)](https://racket.discourse.group/t/newish-racket-videos-that-i-had-not-seen-before/1159)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [July 19, 2022, 5:22pm UTC](https://racket.discourse.group/t/newish-racket-videos-that-i-had-not-seen-before/1159 "2022-07-19T17:22:39Z")
Hi, I came across some Racket videos recently and thought I'd share Functional Programming (Racket) (12 videos) Why learn Racket? (10 minutes) by Eric Clack on the Racketfest YouTube channel Why Racket? Interview w… --- ## [How to speed up array indexing from untyped Racket](https://racket.discourse.group/t/how-to-speed-up-array-indexing-from-untyped-racket/430)
**Author:** [@soegaard](https://racket.discourse.group/u/soegaard)\ **Replies:** 11\ **Last updated:** [July 16, 2022, 12:20pm UTC](https://racket.discourse.group/t/how-to-speed-up-array-indexing-from-untyped-racket/430 "2022-07-16T12:20:45Z")
The arrays from the math library performs best when using operations that work on an entire axis (think row or column) at a time. Using array-ref and array-set! in a loop will be slower than using array-ref and array-set… --- ## [Email package maintainers when their packages are broken](https://racket.discourse.group/t/email-package-maintainers-when-their-packages-are-broken/1145)
**Author:** [@winny](https://racket.discourse.group/u/winny)\ **Replies:** 10\ **Last updated:** [July 15, 2022, 1:36am UTC](https://racket.discourse.group/t/email-package-maintainers-when-their-packages-are-broken/1145 "2022-07-15T01:36:04Z")
Would it be beneficial to send emails to pkgs.racket-lang.org package maintainers? I think this would enable maintainers to know about build problems such as undeclared dependencies, breakage due to a racket upgrade, or… [Previous page](https://racket.discourse.group/c/general/12.md?page=17) [Next page](https://racket.discourse.group/c/general/12.md?page=19)