WebLisp: A Lisp Interpreter that runs inside the browser | Better HN

16 comments

14 comments · 7 top-level

mpk17y ago· 3 in thread

And a quick shout-out to JSLisp : http://joeganley.com/code/jslisp.html . That was an educational piece of JS for me.

ganley17y ago

Hey, thanks! I wrote that. I went here to post it, and it was already here.

peregrine17y ago

Outstanding.

fluffsterOP17y ago

very cool!

Dilpil17y ago· 2 in thread

How many of these are there anyway?

yu17y ago

Franz, Inc. Allegro Common Lisp has Prompt and Maxima: * http://www.franz.com/products/allegrocl/prompt/javatelnet.ht... * http://www.franz.com/success/demos/maxima/javatelnet.html

mahmud17y ago

That is NOT a "web" Lisp; you're interacting via telnet with Franz Common Lisp, a piece of REAL software with 20+ years of history.

Type this into it:

  (disassemble (lambda ()))

It should spit an assembly language listing.

pmarin17y ago· 1 in thread

Arclite is a subset of Arc written in Javascript.

http://jonathan.tang.name/files/arclite/index.html

fluffsterOP17y ago

Thanks, that looks interesting.

softbuilder17y ago· 1 in thread

http://en.wikipedia.org/wiki/Greenspun%27s_Tenth_Rule

mahmud17y ago

The Tenth Rule applies only to "sufficiently complicated" programs that add so many features and support libraries that they become a poor subset of Lisp.

Implementing your a subset dialect of your favorite language in a poor/hostile/new environment is quite hackish, imo.

owinebarger17y ago

Sweet. It appears to have proper tail recursion.

(define (fib n) (fib-help n (lambda (fn fn-1) fn)))

(define (fib-help n k) (if (<= n 1) (k 1 1) (fib-help (- n 1) (lambda (fn-1 fn-2) (k (+ fn-1 fn-2) fn-1)))))

(fib 1000)

misuba17y ago

So, are there any in-browser lisps that, you know, do something? Maybe one that plays in the Pipes space, letting you work with feeds of various sorts?

uninverted17y ago

No macros?

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