Show posts

Hi There,

The generic list algorithm in the http://www.newlisp.org/newLISP_in_21_minutes.html">interactive tutorialproduces an error when I try to evaluate it.

I was able to fix up the code and get it working (provided below) as per the spirit of the tutorial. Perhaps that tutorial is out of date to newer language features or something.

Old non-working code

Code Select Expand
(define (list-length a-list)
(if (first a-list)
  (+ 1 (list-length (rest a-list)))
  0))

My modified version which seems to work

Code Select Expand
(define (list-length a-list)
(if a-list
  (+ 1 (list-length (rest a-list)))
  0))

newLISP Fan Club

News:

Messages - bluenote

Anything else we might add? / List algorithm in interactive tutorial gives error