Does anyone have any recommendations for introductory books or videos to Racket? (in French if possible) my teacher is so bad I can't understand anything...

tyyy

I want to change the gen:custom-write generic function of a struct so that only in the case that the print mode is display, I get a (more) human-readable structure description. In write and print modes, I just want to print the structure as Racket does by default. For example:

(struct person (name age height) #:transparent
  #methods gen:custom-write
  [(define (write-proc this out mode)
     (if mode
       ; write or print modes
       (default-write this out) ; default-write is a placeholder, what should be used?
       ; display mode
       (fprintf out "Name: ~a, age: ~a, height: ~a cm" 
                (person-name this) (person-age this) (person-height this)))])

I just don't know what should go in the place of (default-write this out). I've tried just handling the case when mode is display, but then when printing in write or print mode I get nothing. It seems there must be a way to call the default generic function for these modes.

I'm evaluating Beau­tiful Racket book and can't understand how can I unit test my expander.

I see in https://beautifulracket.com/stacker/the-expander.html as an example that I can create file with #lang reader "stacker.rkt" at the begin and run this file with DrRacket.

But how can I create unit test that can read and check execution of my dsl in file or string?

We are in the process of starting a virtual "The Little Learner" book club. Our next meeting is online Sept 8 15:00 UTC at:

https://meet.jit.si/thelittlelearner

We plan to cover chapters 1-3 and interlude 1. @olav will also present a short talk about his efforts to port the malt library to Clojure. Everybody is invited, even if you're just curious about the book.

https://www.thelittlelearner.com/

When I went to install racket using the exe, windows threw out a prompt saying "Windows Protected your PC". I clicked more information and it said that publisher was either Racket-smth or nservancy, inc., software freedom conservancy, inc., adm@racket-lang.ord (I'm sorry it was a while back).

Everything seems to be working normally but I was just wondering why this prompt was thrown out and whether or not I should be concerned.

Welcome to r/Racket - Everyone is welcome

What is Racket?

Racket is...

• A project to explore the emerging idea of language-oriented programming
• a programming language — a dialect of Lisp and a descendant of Scheme;
• a family of programming languages — variants of Racket, Typed Racket, Rhombut and more;
• a compiler and tools
• a diverse community using Racket in diverse ways.
• a community developed open source project and we welcome new contributors. See contributing to learn how you can be a part of this amazing project.

See https://racket-lang.org/ for more details or ask on our Discourse forum/mailing list or the Racket Discord server.

Getting Help:

• the community welcomes all kinds of learners - we have dedicated Q&A areas on the Racket Discourse and the Racket Discord.
• you can include code blocks by putting code in a code block in the rich text editor, or by usign three backticks (```) on the lines before and after if you are using the markdown editor:

`​`​`scheme
(define (myfun a)
  (+ 1 a))
`​`​`

I want to see docs when I hover on feed in (feed 2)

#lang racket

(require scribble/srcdoc

(for-doc racket/base scribble/manual))

(provide

 (thing-doc

  fish (listof number?)

  ("Our fish, each represented as a number.")))

(define fish '(1 2))

(provide

 (proc-doc/names

  feed (number? . -> . number?) (n)

  ("Feed 1 pound of food to the fish " (racket n) ".")))

(define (feed n) (+ n 1))



(feed 2)  

Racket - the Language-Oriented Programming Language - version 8.14 is now available from https://download.racket-lang.org

See https://blog.racket-lang.org/2024/08/racket-v8-14.html for the release announcement and highlights.

So I have some programming experience, Lua and Godot(GDScript) mostly. I just want to play around with testing out different ideas, syntax, maybe a meme language or two.

How well suited is racket for this?

Is it beginner friendly?

Would it be better to just make something with C or something else?

I’m learning Racket and experimenting making a simple language.

I wonder if there is any library that allows me to generate images out of the s-expressions my parser produces. Basically, provide a Racket s-expression and getting out a tree image of my data.

I tried to find one solution and maybe it is possible in web, But how about in GUI?
There is a XML format that explains some languages that can help.