Cell: Lisp in Javascript

Hi everyone, original author here. Thanks for all the feedback! My friend posted this before it was really ready for public consumption.<p>My goal here was to learn how Lisp works at a really low level. I'm planning to add the features you would expect from a Lisp (e.g. macros) very soon.

I found one bug: you cannot create a zero argument lambda, e.g. (lambda () 42) will not work. You could also benefit from separate `let' construct, because simulating them with lambdas is a bit painful.<p>Apart from that, it works quite nicely (I was positively surprised you went for lexical scoping), but without macros, you can hardly say it's a Lisp, it's a language with Lispy syntax.

Consider a different name -- "Cells" is the name of a cool Common Lisp library by a ... let's say notorious ... Lisp programmer.<p><a href="http://common-lisp.net/project/cells/" rel="nofollow">http://common-lisp.net/project/cells/</a>

Cool. I have been working through the lessons in Nathan's University (<a href="http://nathansuniversity.com/" rel="nofollow">http://nathansuniversity.com/</a>) which take you writing a Lisp interpreter (though admittedly with less rigor than this project) in Javascript.<p>Definitely recommended if you want a starting point for something similar and don't know where to begin.

Gotta shout out to my own Lisp-in-JavaScript interpreter from long, long ago: <a href="http://joeganley.com/code/jslisp.html" rel="nofollow">http://joeganley.com/code/jslisp.html</a> ... far less complete than this, but perhaps interesting to someone for archeological reasons or something.

Thank you for implementing command history :).<p>There is a slight bug though. Since the position gets updated after the position is calculated, the displayed value is out of sync.<p>So entering<p>1<p>2<p>3<p>And then typing: UP (3), UP (2), DOWN (1)<p>Displays 1, rather than 3.

nice job! I like how clean the source is, it would be really easy to extend or use as a base for writing ones own interpreter.

Why does this happen:<p><pre><code> (def a 3) 3 a null </code></pre> a should be 3, not null.

good work, just was checking arc in js; <a href="http://jonathan.tang.name/files/arclite/index.html" rel="nofollow">http://jonathan.tang.name/files/arclite/index.html</a> and was surprised to see cell on hn.

here is a basic lisp interpreter written in python: <a href="https://github.com/keithgabryelski/plisp" rel="nofollow">https://github.com/keithgabryelski/plisp</a>