I’ve just picked up the opening chapters of Let Over Lambda, which describes itself as a book on macro programming – particularly Common Lisp macro programming. One of the early macros given in the book is unit-of-time which looks like this: (defmacro unit-of-time (value unit) `(* ,value ,(case unit ((s) 1) ((m) 60) ((h) 3600) [...]
I actually tagged the 0.3.0 release of Heist, my Ruby Scheme implementation, about a month back, mostly to get it off my desk for a while. I’ve made a few minor tweaks and released 0.3.1 over the weekend, so now’s as good a time as any to go over what’s new. The major milestone for [...]
I gave a talk at London Ruby User Group yesterday, based on the work I’ve been doing on Heist, my Scheme interpreter project. I wrote the core of a basic Scheme interpreter in about 15 minutes as a live-coded demo (well, kind of – the coding was pre-recorded so I could focus on talking), which [...]
With apologies to the ever-entertaining Onion, I’m announcing the 0.2.0 release of Heist, henceforth to be known as “the one with the lists”. To recap, Heist is a Scheme interpreter I’m writing in Ruby in order to teach myself a few things about how languages work while I read Structure and Interpretation of Computer Programs [...]
There seems to be a tradition of some two years’ standing that dictates I must release some piece of open source software on or around my birthday. A couple of years ago it was Flagger, a Rails plugin for doing useful things with boolean ‘flag’ columns in your database, and last year it was (with [...]
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