posted by Eli Barzilay

Racket version 5.3.4 is now available from http://racket-lang.org/

Extflonums (80-bit floating-point numbers) are supported on some x86/x86_64 platforms — including Windows, and including platforms where Racket is compiled to use SSE instructions for flonum arithmetic. Thanks to Michael Filonenko.

OS X: DrRacket and all of the other apps are now signed with an official key.

Tally Maze: a new game based an enumeration of 2d mazes.

The Optimization Coach, a DrRacket plugin, has been moved from the Racket distribution to the Racket package repository. Install it with: raco pkg install optimization-coach .

Redex: define-union-language now merges productions when languages define the same nonterminals. Thanks to William Bowman.