Javascript Lisp Interpreter

(or press Shift+Enter)
If you don't already know Lisp these are some good starting places:
Copyright Stuff
I copied some of the functions defined in lisp from Joe Ganley's page: Portions copyright © 1997-2006 Joe Ganley.
And also checked out Marc Belmont's implementation: Portions copyright © 2005 Marc Belmont
And was influenced by various stuff written by Paul Graham as well:
Using the Interpreter

This interpreter currently understands a reasonable subset of the Common Lisp dialect. Currently implemented primitives include:

  • quote (aliased as ')
  • atom
  • numberp
  • +
  • -
  • *
  • /
  • <
  • <=
  • >
  • >=
  • =
  • eq
  • and
  • or
  • car
  • cdr
  • c[ad]+r
  • cons
  • list
  • cond
  • lambda
  • defun (aliased as define)
  • let
  • set
  • eval

There are a also a handful of "helper" functions defined in lisp that are included:

  • null
  • not
  • if
  • append
  • pair
  • assoc
  • maplist
  • len
  • flatten
  • equal
  • append
  • member
  • last
  • reverse
  • remove

You can embed this interpreter in a page by adding the following in your <head> tag:

   <script src=""></script>

And then adding your embedded lisp code in script tags with a type of "application/lisp":

   <script type="application/lisp">"Hello World"</script>
   <script type="application/lisp">(+ 1 3)</script>

For example:

This is not very useful right now, but can be something interesting to play around with.
I'm still working on this off and on for fun so other features should be added as I get around to it. If there's something you'd like to see added please feel free to let me know.
I also have a node cli wrapper available on github.