DrRacket
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DrRacket on Ubuntu Linux
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| Paradigm | Multi-paradigm: functional, procedural, modular, object-oriented, logic, reflective, meta |
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| Designed by | PLT Inc. |
| Developer | PLT Inc. |
| First appeared | 1994 |
| Stable release |
6.8 / January 24, 2017
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| Typing discipline | Dynamic, strong, static |
| Platform | x86, PowerPC, SPARC, MIPS, ARM |
| OS | Cross-platform |
| License | LGPL |
| Filename extensions |
.rkt, .rktl, .rktd, .scrbl, .plt, .ss, .scm
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| Website | racket-lang |
| Dialects | |
| Typed Racket, Lazy Racket, Scribble, FrTime | |
| Influenced by | |
| Scheme, Eiffel | |
| Influenced | |
| Scheme,Rust,Clojure | |
Racket (formerly PLT Scheme) 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.
The platform provides an implementation of the Racket language (including a sophisticated run-time system, various libraries, JIT compiler, and more) along with a development environment called DrRacket (formerly named DrScheme) written in Racket itself. The IDE and an accompanying programming curriculum is used in the ProgramByDesign outreach program, an attempt to turn computing and programming into "an indispensable part of the liberal arts curriculum". The core language is known for its extensive macro system which enables the creation of embedded and domain-specific languages, language constructs such as classes or modules, and separate dialects of Racket with different semantics.
The platform distribution is free and open-source software distributed under the GNU Lesser General Public License (LGPL) license. Extensions and packages written by the community are uploaded to Racket's centralized package catalog.
Matthias Felleisen founded PLT in the mid 1990s, first as a research group, soon after as a project dedicated to the production of pedagogic materials for novice programmers (lectures, exercises/projects, software). In January 1995, the group decided to develop a pedagogic programming environment based on Scheme. Matthew Flatt cobbled together MrEd—the original virtual machine for Racket—from libscheme,wxWidgets, and a few other free systems. In the years that followed, a team including Flatt, Robby Findler, Shriram Krishnamurthi, Cormac Flanagan, and many others produced DrScheme, a programming environment for novice Scheme programmers and a research environment for soft typing. The main development language that DrScheme supported was called PLT Scheme.
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