Racket is a popular variant of the Scheme programming language. Its features and benefits include:
Grow your Program: Racket's interactive mode encourages experimentation, and quick scripts easily compose into larger systems. Small scripts and large systems both benefit from native-code JIT compilation. When a system gets too big to keep in your head, you can add static types.
Grow your Language: Extend Racket whenever you need to. Mold it to better suit your tasks without sacrificing interoperability with existing libraries and without having to modify the tool chain. When less is more, you can remove parts of a language or start over and build a new one.
Grow your Skills: Whether you're just starting out, want to know more about programming language applications or models, looking to expand your horizons, or ready to dive into research, Racket can help you become a better programmer and system builder.
What’s new in version 8.5
Updated on May 03 2022
Racket’s new -y flag automatically keeps compiled files up to date, reducing subsequent load times.
Error-message realms allow Racket-hosted languages to adapt and rewrite error messages to make sense in a particular context.
Nonprivileged users can control package installation scope using an “other-version” directory in the addon-dir.
Racket CS runs on platforms where native-code generation is not currently supported (e.g., s390x or ppc64). See “README.txt” in the source distribution for more information on the —enable-pb flag to configure.
DrRacket’s new ‘Reopen Closed Tab’ file menu item will open previously closed tabs.
Typed Racket has support for the xml library; use typed/xml.
Rackunit reports source locations for failed test cases in the Typed Racket language.
Plot has violin plots and improved box-and-whisker plots.
Boxes are supported alongside lists, vectors etc. in place-channel messages.
Those who manually configure Racket CS to use Zlib compression for compiled code should be aware of CVE–2018–25032; the next release and the current snapshot builds use a newer, safer version of zlib.
The release includes many other repairs and changes!