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The 2d language installs #2d reader support in the readtables, and then chains to the reader of another language that is specified immediately after 2d. The #2d syntax extension adds the ability use a two-dimensional grid syntax. That is, you can draw an ASCII-art grid and then treat that as an expression. For example, here is a simple equality function that operates on pairs and numbers, written

Pollen is a publishing system that helps authors make functional and beautiful digital books. I created Pollen so I could make my web-based books Practical Typography, Typography for Lawyers, and Beautiful Racket. Sure, go take a look. Are they better than the last digital books you encountered? Yes they are. Would you like your next digital book to work like that? If so, keep reading. At the core

3.3 Keyboard Shortcuts🔗iMost key presses simply insert a character into the editor, such as a, 3, or (. Other keys and key combinations act as keyboard shortcuts that move the blinking caret, delete a line, copy the selection, etc. Keyboard shortcuts are usually trigger by key combinations using the Control, Meta, or Command key. The keyboard shortcuts are displayed using the same string-encoded

Matthias Felleisen, Matthew Flatt, Robby Findler, Jay McCarthy Since 1995 the number of "repository contributors" has grown from a small handful to three dozen and more. This growth implies a lot of learning and the introduction of inconsistencies of programming styles. This document is an attempt leverage the former and to start reducing the latter. Doing so will help us, the developers, and our

Sam Tobin-Hochstadt <samth@racket-lang.org>, Vincent St-Amour <stamourv@racket-lang.org>, Eric Dobson <endobson@racket-lang.org>, and Asumu Takikawa <asumu@racket-lang.org> Typed Racket is Racket’s gradually-typed sister language which allows the incremental addition of statically-checked type annotations. This guide is intended for programmers familiar with Racket. For an introduction to Racket,

How do we make dynamic web applications? In this tutorial, we show how to use Racket to achieve this goal. We explain how to start up a web server, how to generate dynamic web content, and how to interact with the user. Our working example will be a simple web journal—a "blog." This tutorial is intended for students who have read enough of How to Design Programs to know how to use structures, high

This tutorial provides a brief introduction to the Racket programming language by using one of its picture-drawing libraries. Even if you don’t intend to use Racket for your artistic endeavours, the picture library supports interesting and enlightening examples. After all, a picture is worth five hundred "hello world"s. Along the same lines, we assume that you will run the examples using DrRacket.