# General **URL:** https://racket.discourse.group/c/general/12.md?page=16 [Latest](https://racket.discourse.group/latest.md) · [Categories](https://racket.discourse.group/categories.md) · [Tags](https://racket.discourse.group/tags.md) **Page:** 17 --- ## [Racket error index?](https://racket.discourse.group/t/racket-error-index/1763)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [March 8, 2023, 9:02pm UTC](https://racket.discourse.group/t/racket-error-index/1763 "2023-03-08T21:02:22Z")
There is enthusiasm for a ‘Racket Error Index’ the on the Racket Discord at #off-topic Anyone up for working on a MVP? Stephen Inspired by: --- ## [Welcome the community moderation team!](https://racket.discourse.group/t/welcome-the-community-moderation-team/1765)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [March 8, 2023, 8:48pm UTC](https://racket.discourse.group/t/welcome-the-community-moderation-team/1765 "2023-03-08T20:48:35Z")
Just a quick note; I'm really grateful for all the members of the Racket Project leadership, past and present, for all the work they have done, and continue to do. So I am very pleased to thank the community members wh… --- ## [What are the most frequently asked questions about Racket?](https://racket.discourse.group/t/what-are-the-most-frequently-asked-questions-about-racket/1755)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [March 6, 2023, 12:28pm UTC](https://racket.discourse.group/t/what-are-the-most-frequently-asked-questions-about-racket/1755 "2023-03-06T12:28:05Z")
What are the most frequently asked questions about Racket? I’m looking to update the FAQ, and it would be nice for it to be a closer match to reality, rather than just my perception of what is most asked. :beetle: --- ## [Not getting an email code to register on pkgs.racket-lang.org](https://racket.discourse.group/t/not-getting-an-email-code-to-register-on-pkgs-racket-lang-org/1660)
**Author:** [@Grafcube](https://racket.discourse.group/u/Grafcube)\ **Replies:** 31\ **Last updated:** [March 6, 2023, 7:23am UTC](https://racket.discourse.group/t/not-getting-an-email-code-to-register-on-pkgs-racket-lang-org/1660 "2023-03-06T07:23:51Z")
I'm trying to create an account on pkgs.racket-lang.org to submit a package but I'm not getting the email code at all. I enter my email and evaluate the anti-spam code and then it says that the code has been emailed. I t… --- ## [Racket meet-up Saturday 4 March](https://racket.discourse.group/t/racket-meet-up-saturday-4-march/1752)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [March 5, 2023, 11:39am UTC](https://racket.discourse.group/t/racket-meet-up-saturday-4-march/1752 "2023-03-05T11:39:24Z")
I believe I forgot to post the announcement I hope it went ahead in my absence ? Next Racket meet-up will be Saturday 1 April Stephen :beetle: --- ## [Rosetta code Racket category](https://racket.discourse.group/t/rosetta-code-racket-category/1754)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [March 5, 2023, 10:28am UTC](https://racket.discourse.group/t/rosetta-code-racket-category/1754 "2023-03-05T10:28:06Z")
HI, The Racket language category on Rosetta Code has jut been updated to include Tasks not implemented in Racket. (e.g. Circular primes - Rosetta Code) best regards Stephen :beetle: --- ## [Racket meet-up presenters for 2023](https://racket.discourse.group/t/racket-meet-up-presenters-for-2023/1722)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [February 17, 2023, 11:03am UTC](https://racket.discourse.group/t/racket-meet-up-presenters-for-2023/1722 "2023-02-17T11:03:17Z")
Hi I floated this at the last meet-up: Would people be interested in language developers - not necessarily Racket languages - as speakers at future meet-ups? Please ‘like’ if you think this is worth trying, and let me… --- ## [An option to omit type checks](https://racket.discourse.group/t/an-option-to-omit-type-checks/1735)
**Author:** [@joskoot](https://racket.discourse.group/u/joskoot)\ **Replies:** 15\ **Last updated:** [March 3, 2023, 5:51pm UTC](https://racket.discourse.group/t/an-option-to-omit-type-checks/1735 "2023-03-03T17:51:14Z")
Hi, The type checking in Racket is a big help in debugging programs and to prevent crashes that shut down the whole of the computer (as far as seen my the current user). I don't know how the most recent version of Fortr… --- ## [Sxml serialization of non-XML-compatible identifiers](https://racket.discourse.group/t/sxml-serialization-of-non-xml-compatible-identifiers/1751)
**Author:** [@jbclements](https://racket.discourse.group/u/jbclements)\ **Replies:** 0\ **Last updated:** [March 3, 2023, 5:51am UTC](https://racket.discourse.group/t/sxml-serialization-of-non-xml-compatible-identifiers/1751 "2023-03-03T05:51:18Z")
In t0mpr1c3 points out that srl:sxml-\>xml does not appear to perform any validation to ensure that the tag names used conform to legal xml names (IIUC, this is the "NCName" production in the W3C's XML recommendation: … --- ## [What's official racket and what's not?](https://racket.discourse.group/t/whats-official-racket-and-whats-not/1447)
**Author:** [@maketo](https://racket.discourse.group/u/maketo)\ **Replies:** 37\ **Last updated:** [February 24, 2023, 9:07pm UTC](https://racket.discourse.group/t/whats-official-racket-and-whats-not/1447 "2023-02-24T21:07:36Z")
To someone new to Racket - looking at docs.racket-lang.org - this is basically a "soup" of things that seems to be an unordered brain dump of everything Racket related. I may have missed the memo buried on that website … --- ## [What have you done with Racket this year?](https://racket.discourse.group/t/what-have-you-done-with-racket-this-year/1584)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 4\ **Last updated:** [February 21, 2023, 4:16am UTC](https://racket.discourse.group/t/what-have-you-done-with-racket-this-year/1584 "2023-02-21T04:16:37Z")
What have you done with Racket this year? :stickman: :racket:​ :racket\_heart: :party\_blob\_gif: :tada: We're proud to be a small part of the amazing things made with Racket in 2022 & looking forward to more in 2023! Te… --- ## [Langjam 17-19th of Feb 2023](https://racket.discourse.group/t/langjam-17-19th-of-feb-2023/1723)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 1\ **Last updated:** [February 17, 2023, 11:33am UTC](https://racket.discourse.group/t/langjam-17-19th-of-feb-2023/1723 "2023-02-17T11:33:12Z")
Hi, ‘JT’ of the @rust-lang / @nushell core team (and previously of the TypeScript core team) is running a ‘Lang Jam’. This is a weekend coding jam where teams or individuals create a programming language based on the th… --- ## [Migrating packages from previous installs in DrRacket](https://racket.discourse.group/t/migrating-packages-from-previous-installs-in-drracket/1719)
**Author:** [@benknoble](https://racket.discourse.group/u/benknoble)\ **Replies:** 10\ **Last updated:** [February 16, 2023, 6:06pm UTC](https://racket.discourse.group/t/migrating-packages-from-previous-installs-in-drracket/1719 "2023-02-16T18:06:51Z")
Follow-up to my question above about a minimal process for upgrading... I took the opportunity to upgrade to Racket v8.8 (from v8.7). I'm using macOS Monterey 12.6.3. I dragged the Racket v8.8 folder from the .dmg into … --- ## [Hash-table name?](https://racket.discourse.group/t/hash-table-name/1699)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [February 13, 2023, 9:20pm UTC](https://racket.discourse.group/t/hash-table-name/1699 "2023-02-13T21:20:56Z")
I’ve been following the topic RFC: hash table pattern matching. The Racket Reference (4.15 Hash Tables) mentions performance differences between mutable and immutable versions. In other languages Hash tables go by othe… --- ## [Scheme+ v5.0 for Racket](https://racket.discourse.group/t/scheme-v5-0-for-racket/1704)
**Author:** [@damien\_mattei](https://racket.discourse.group/u/damien_mattei)\ **Replies:** 0\ **Last updated:** [February 12, 2023, 9:31am UTC](https://racket.discourse.group/t/scheme-v5-0-for-racket/1704 "2023-02-12T09:31:46Z")
Hello, i just released a new version of Scheme+ Scheme+ is an extension of the syntax of the Scheme language. Scheme+ makes it easy the assignment of Scheme objects in infix (works also in prefix) notation with a few n… --- ## [Check-syntax arrow with rename-in](https://racket.discourse.group/t/check-syntax-arrow-with-rename-in/1644)
**Author:** [@greghendershott](https://racket.discourse.group/u/greghendershott)\ **Replies:** 34\ **Last updated:** [February 6, 2023, 4:22pm UTC](https://racket.discourse.group/t/check-syntax-arrow-with-rename-in/1644 "2023-02-06T16:22:55Z")
Hovering on get-pure-port, two arrows are drawn to it: From importing net/url. From the rename-in of get-pure-port to a different name --- in an unrelated submodule m that isn't even in scope for the main, file mod… --- ## [Racket meet-up Saturday 4 Feb at 18:00 UTC :racket:](https://racket.discourse.group/t/racket-meet-up-saturday-4-feb-at-18-00-utc/1684)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 2\ **Last updated:** [February 4, 2023, 8:01pm UTC](https://racket.discourse.group/t/racket-meet-up-saturday-4-feb-at-18-00-utc/1684 "2023-02-04T20:01:01Z")
Racket meet-up Saturday 4 Feb at 18:00 UTC :racket: At this meet-up: Racketfest! Show and tell News & rumours AOB Meet-up time at your location: 2023-02-04T18:00:00Z (UTC) (Discourse should convert this for you) In … --- ## [Call for participation: Racketfest 2023](https://racket.discourse.group/t/call-for-participation-racketfest-2023/1683)
**Author:** [@jesse](https://racket.discourse.group/u/jesse)\ **Replies:** 2\ **Last updated:** [February 4, 2023, 11:20am UTC](https://racket.discourse.group/t/call-for-participation-racketfest-2023/1683 "2023-02-04T11:20:38Z")
The Racketfest 2023 program is all set! Nine speakers will be joining us to share all sorts of Racket wisdom, coming from all corners of the Racket ecosystem: academia and industry, hobbyist and professional; application… --- ## [Call for Participation: BOB 2023 (Berlin, March 17)](https://racket.discourse.group/t/call-for-participation-bob-2023-berlin-march-17/1554)
**Author:** [@mike](https://racket.discourse.group/u/mike)\ **Replies:** 1\ **Last updated:** [January 31, 2023, 12:14pm UTC](https://racket.discourse.group/t/call-for-participation-bob-2023-berlin-march-17/1554 "2023-01-31T12:14:27Z")
========================================================================= BOB 2023 Conference “What happens if we simply use what’s best?” March 17, 2023, Berlin https://bobkonf.de/2023/ Pr… --- ## [Writing a simple interpreter which can add numbers in tree form](https://racket.discourse.group/t/writing-a-simple-interpreter-which-can-add-numbers-in-tree-form/1668)
**Author:** [@devosalain](https://racket.discourse.group/u/devosalain)\ **Replies:** 4\ **Last updated:** [January 29, 2023, 8:42pm UTC](https://racket.discourse.group/t/writing-a-simple-interpreter-which-can-add-numbers-in-tree-form/1668 "2023-01-29T20:42:00Z")
Following code works perfect: #lang typed/racket (require racket/match ) (define-struct myoperand (\[ O : \[U 'plus 'minus\] \])) (define-struct myleaf (\[ L : Number\])) (define-struct mynode (\[ N :(cons myoperand (co… --- ## [Fighting with racket type-system & match](https://racket.discourse.group/t/fighting-with-racket-type-system-match/1669)
**Author:** [@devosalain](https://racket.discourse.group/u/devosalain)\ **Replies:** 1\ **Last updated:** [January 28, 2023, 1:55pm UTC](https://racket.discourse.group/t/fighting-with-racket-type-system-match/1669 "2023-01-28T13:55:58Z")
Following program defines 3 types and one function which tries to match the 3 types. The error given is : "match syntax error in pattern in : (stc x) Obvious question why ? #lang typed/racket (require racket/match )… --- ## [Multiple values with Racket behave different than Guile or Chicken](https://racket.discourse.group/t/multiple-values-with-racket-behave-different-than-guile-or-chicken/1667)
**Author:** [@damien\_mattei](https://racket.discourse.group/u/damien_mattei)\ **Replies:** 5\ **Last updated:** [January 28, 2023, 9:25am UTC](https://racket.discourse.group/t/multiple-values-with-racket-behave-different-than-guile-or-chicken/1667 "2023-01-28T09:25:20Z")
hello, it is for a while i did not use 'values in Scheme and i did not use often 'values (so i perhaps have a problem of comprehension with 'values) and doing this in Racket with racket language or R5RS give the same er… --- ## [Where are GLU and GLUT libraries for OpenGL?](https://racket.discourse.group/t/where-are-glu-and-glut-libraries-for-opengl/1657)
**Author:** [@hendrikboom3](https://racket.discourse.group/u/hendrikboom3)\ **Replies:** 5\ **Last updated:** [January 27, 2023, 9:46pm UTC](https://racket.discourse.group/t/where-are-glu-and-glut-libraries-for-opengl/1657 "2023-01-27T21:46:56Z")
Is there a Racket-style GLU to go with sgl, the Racket-style OpenGL? Same for any other traditional helper libraries? (GLUT?) I have not been able to guess the proper spelling of gluPerspective in Racket-style. glu-p… --- ## [Provide an example using "eval-syntax" & "syntax" in typed/racket](https://racket.discourse.group/t/provide-an-example-using-eval-syntax-syntax-in-typed-racket/1662)
**Author:** [@devosalain](https://racket.discourse.group/u/devosalain)\ **Replies:** 7\ **Last updated:** [January 26, 2023, 12:35am UTC](https://racket.discourse.group/t/provide-an-example-using-eval-syntax-syntax-in-typed-racket/1662 "2023-01-26T00:35:47Z")
I have difficulty using typed/racket & the function "eval-syntax". Can someone provide a compiling example --- ## [When would you use language plait & when would you use language typed/racket?](https://racket.discourse.group/t/when-would-you-use-language-plait-when-would-you-use-language-typed-racket/1663)
**Author:** [@devosalain](https://racket.discourse.group/u/devosalain)\ **Replies:** 9\ **Last updated:** [January 27, 2023, 5:15am UTC](https://racket.discourse.group/t/when-would-you-use-language-plait-when-would-you-use-language-typed-racket/1663 "2023-01-27T05:15:00Z")
When would you use language plait & when would you use language typed/racket ? --- ## [Language plait and gui](https://racket.discourse.group/t/language-plait-and-gui/1666)
**Author:** [@devosalain](https://racket.discourse.group/u/devosalain)\ **Replies:** 5\ **Last updated:** [January 27, 2023, 3:23am UTC](https://racket.discourse.group/t/language-plait-and-gui/1666 "2023-01-27T03:23:51Z")
Is it possible to run a gui when the language is plait. Following code fails ;#lang racket #lang plait (require racket/gui) (require racket/class) (define window (new frame% \[label "Hello World!"\])) (send wind… --- ## [Call by reference](https://racket.discourse.group/t/call-by-reference/1665)
**Author:** [@devosalain](https://racket.discourse.group/u/devosalain)\ **Replies:** 1\ **Last updated:** [January 27, 2023, 12:30am UTC](https://racket.discourse.group/t/call-by-reference/1665 "2023-01-27T00:30:28Z")
What do you think of following demo code demostrating call-by-reference. #lang typed/racket ( : addone : \[Boxof Integer\] -\> Void ) (define addone (lambda (x) \[begin (: ux : Integer ) (define ux (unbo… --- ## [User config files](https://racket.discourse.group/t/user-config-files/1659)
**Author:** [@joeld](https://racket.discourse.group/u/joeld)\ **Replies:** 4\ **Last updated:** [January 24, 2023, 6:43pm UTC](https://racket.discourse.group/t/user-config-files/1659 "2023-01-24T18:43:38Z")
Does anyone have a favorite cross-platform method for storing/retrieving per-user configuration options for their apps? I can’t find it now, so I may have hallucinated it, but I thought I remembered seeing some function… --- ## [Racket FAQ: images outside of DrRacket and does the list of questions need updating?](https://racket.discourse.group/t/racket-faq-images-outside-of-drracket-and-does-the-list-of-questions-need-updating/1651)
**Author:** [@spdegabrielle](https://racket.discourse.group/u/spdegabrielle)\ **Replies:** 0\ **Last updated:** [January 20, 2023, 3:58pm UTC](https://racket.discourse.group/t/racket-faq-images-outside-of-drracket-and-does-the-list-of-questions-need-updating/1651 "2023-01-20T15:58:20Z")
Just a little thing, but someone asked how they could display images if they weren't using DrRacket. ▶ Note It's not the first time someone has asked so I added 'How do I display images outside of DrRacket?' to the Racke… --- ## [Generating svgs using the html renderer for Scribble](https://racket.discourse.group/t/generating-svgs-using-the-html-renderer-for-scribble/1634)
**Author:** [@soegaard](https://racket.discourse.group/u/soegaard)\ **Replies:** 2\ **Last updated:** [January 11, 2023, 9:14pm UTC](https://racket.discourse.group/t/generating-svgs-using-the-html-renderer-for-scribble/1634 "2023-01-11T21:14:02Z")
Hi All, The the html renderer for Scribble has a keyword argument #:image-preferences. The argument can be used to pass a list of preferred image formats to Scribble, such as svg, png etc. In the example program belo… [Previous page](https://racket.discourse.group/c/general/12.md?page=15) [Next page](https://racket.discourse.group/c/general/12.md?page=17)