List algorithm in interactive tutorial gives error
Posted: Sat Nov 29, 2014 1:50 am
Hi There,
The generic list algorithm in the 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 Perhaps that tutorial is out of date to newer language features or something.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
My modified version which seems to work
The generic list algorithm in the 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 Perhaps that tutorial is out of date to newer language features or something.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 all
(define (list-length a-list)
(if (first a-list)
(+ 1 (list-length (rest a-list)))
0))
Code: Select all
(define (list-length a-list)
(if a-list
(+ 1 (list-length (rest a-list)))
0))