Racket - Programming language

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Racket is an open source programming language created in 1994 by Matthias Felleisen and Matthew Flatt and Robert Bruce Findler and Shriram Krishnamurthi.

#43on PLDB

30Years Old

18kRepos

Download source code:

git clone https://github.com/racket/racket

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Racket is a general purpose, multi-paradigm programming language in the Lisp-Scheme family. One of its design goals is to serve as a platform for language creation, design, and implementation. The language is used in a variety of contexts such as scripting, general-purpose programming, computer science education, and research. Read more on Wikipedia...

Tags: programming language, lisp
Racket is developed on GitHub and has 4,741 stars
There are at least 17,790 Racket repos on GitHub
Early development of Racket happened in PLT Inc.
Racket is written in Racket, C, Scheme, M4, Assembly language, Bourne shell, JSON, Tex, XML, Make, Markdown, Diff, YAML, Pascal, C++, Expect, Ada, HTML, C#, Meson, Python, CSS, JavaScript, C shell, Perl, SaltStack, Bash, IDL, R, CMake, SAS, Dockerfile, PowerShell
The Google BigQuery Public Dataset GitHub snapshot shows 3k users using Racket in 4k repos on GitHub
Check out the 6 Racket meetup groups on Meetup.com.
There are 316 Project Euler users using Racket
Explore Racket snippets on Rosetta Code
Racket appears in the TIOBE Index
Pygments supports syntax highlighting for Racket
GitHub supports syntax highlighting for Racket
Learn Racket on exercism.
There is 1 Jupyter Kernel for Racket
There is a central package repository for Racket
Indeed.com has 1 matches for "racket engineer".
racket-lang.org was registered in 2010
See also: (16 related languages) X86, PowerPC, SPARC, MIPS architecture, ARM, Scheme, Eiffel, Rust, Clojure, Lisp, Java, Unicode, JSON, Unix, Linux, Arc
25 PLDB concepts link to Racket: cloc, datafun, eskew, fructure-editor, GHC, Hackett, Liso, mal, Mu, p4p, Particles, pie-lang, Pycket, Pygments, Racket, remix, rockstar-rkt, scribble, sham, shill, Slideshow, t-lang, turnstile-plus, video, Zuo

Example from Riju:

#lang racket/base
(display "Hello, world!\n")

Example from hello-world:

#lang racket
"Hello World"

Example from the Hello World Collection:

;; Hello world in Racket

#lang racket/base
"Hello, World!"

Example from Linguist:

; Clean, simple and efficient code -- that's the power of Racket!
; http://racket-lang.org/

(define (bottles n more)
  (printf "~a bottle~a of beer~a"
          (case n [(0) "no more"] [(1) "1"] [else n])
          (if (= n 1) "" "s")
          more))

(for ([n (in-range 99 0 -1)])
  (bottles n " on the wall, ")
  (bottles n ".\n")
  (printf "Take one down and pass it around, ")
  (bottles (sub1 n) " on the wall.\n\n"))

(displayln "No more bottles of beer on the wall, no more bottles of beer.")
(displayln "Go to the store and buy some more, 99 bottles of beer on the wall.")

Example from Wikipedia:

#lang typed/racket

(: fact (Integer -> Integer))
(define (fact n)
  (cond [(zero? n) 1]
        [else (* n (fact (- n 1)))]))

Language features

Feature	Supported	Example	Token
Print() Debugging	✓		display
Homoiconicity	✓
Line Comments	✓	; A comment	;
Module Pattern	✓	(module nest racket (provide (for-syntax meta-eggs) (for-meta 1 meta-chicks) num-eggs) (define-for-syntax meta-eggs 2) (define-for-syntax meta-chicks 3) (define num-eggs 2))
Prefix Notation	✓	(+ 1 2 3)
Mixins	✓	(mixin (interface-expr ...) (interface-expr ...) class-clause ...)
Macros	✓	; https://docs.racket-lang.org/guide/macros.html (define-syntax-rule (swap x y) (let ([tmp x]) (set! x y) (set! y tmp)))
File Imports	✓	(require (prefix-in tcp: racket/tcp))
Comments	✓
Symbol Tables	✓	;; Some programming languages allow the symbol table to be manipulated at run-time, so that symbols can be added at any time.
Strings	✓	"hello world"	"
Case Insensitive Identifiers	X
Semantic Indentation	X