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

Dilpil
How many of these are there anyway?
yu
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
mahmud
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.
latkinso42
(disassemble (lambda ()))
mahmud
Not a HN textarea form input, you type that into a Common Lisp repl (interactive shell.) It should look like this:

  CG-USER(1): (disassemble (lambda ()))
  ;; disassembly of #<Function (:ANONYMOUS-LAMBDA 130) @ #x20ec218a>
  ;; formals: 

  ;; code start: #x20ec214c:
     0: e3 03       jcxz	5
     2: ff 57 8b  call	*[edi-117]      ; SYS::TRAP-WNAERR
     5: 80 7f cb 00 cmpb	[edi-53],$0   ; SYS::C_INTERRUPT-PENDING
     9: 74 03       jz	14
     11: ff 57 87  call	*[edi-121]      ; SYS::TRAP-SIGNAL-HIT
     14: 8b c7       movl	eax,edi
     16: f8          clc
     17: 8b 75 fc  movl	esi,[ebp-4]
     20: c3          ret
     21: 90          nop
Proof that it's not a javascript "web lisp" :-)
misuba
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?
owinebarger
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)