Brid.js

brid.js (pronounced like "bridges") is a LISP that uses JSON instead of S-Expressions implemented in JavaScript

based upon Peter Norvig's lis.py (Sorry I dropped your ai-class, Peter.)

This was partially inspired by Stuart Halloway's talks "Simplicity Ain't Easy" and "Radical Simplicity"

But the real story is: Sometimes I need to use JSON outside of REST And I've started using a style of JSON document that looks a lot like S-Expressions. For example, in json_shape ( https://github.com/jes5199/json_shape ), I describe JSON datatypes using predicates that look like this: ["array", {"contents": ["number", {"max":255, "min":0} ] } ] And in the Clojure port, ( https://github.com/jes5199/cljson_shape ) I actually translate that directly into a Clojure S-Expression, like so: (array {:contents (number, {:max 255 :min 0} ) } ) Which is almost one-to-one, if you blur the distinction between symbols, keywords, and strings. So why not actually implement such a LISP?

brid.js currently implements a tiny subset of Scheme and Clojure It does not yet support macros. It does not support tail recursion. Its standard library is woefully incomplete.

I've got a REPL in bridjs.html, also available at http://jes5199.github.com/brid.js/bridjs.html

Example expressions: ["map", ["lambda", ["x"], ["+", "x", 1] ], ["quote", [1, 2, 3]] ] ["reduce", "+", ["quote", [1,2,3,4,5]]]

Released under the MIT license. Patches welcome.

dedicated to my best friend Jenn on some sort of anniversary, marking 1 year 29th of November, 2011