The Racket guide for Emacs also recommends to install Quack, which I happened to try long ago for an introductory course in programming for Bioinformatics where we were using Scheme (I was using Chicken Scheme at that time).
I believe DrRacket (formerly PLT Scheme) is really a great software to learn Scheme and do serious stuff with it, including computational science. I know people would not necessarily consider Racket as a pure Scheme language. By the way, here are some of the most upvoted questions on Stack Overflow:
- What is the best Scheme or LISP implementation for OS X?
- What are the differences between Clojure, Scheme/Racket and Common Lisp?
- Dr Racket problems with SICP
For example, using a toy demo from Racket website, here is how it looks under the native Mac app:
And here is the same script processed through Emacs Geiser:
With Emacs, you just have to
M-x run-geiser to start the REPL (it is
pretty fast to come up, unlike Clojure REPL).
Geiser targets both Racket and Guile, I decided to compile Guile.
I tried to install Guile some time ago, following a suggestion on
Cross Validated where I
provided a brief illustration with Scheme. But it soon reached to the point
where I had too much dependencies to manage and I finally gave up. This
time, it works perfectly well, and I suspect that this is because I added
all those dependencies in the mean time (in particular, to install
Pyret is a programming language designed to serve as an outstanding choice for programming education while exploring the confluence of scripting and functional programming.
Emacs 24.4 is available for OS X on http://emacsformacosx.com/ (check the Nightlies builds), and it comes with pretiffy,(a) see also What's new in Emacs 24.4. By the way, I learned that Emacs 24.3 suffers from a problem when rendering sRGB color, which explains why I got some strange problems with powerline. (b)
(a) I use