LispForum

This issue is resolved by your replies. Thanks, Rarmarren and Edgar!

For this form (cons 'a (cons 'chicken 'cat)) (consp (cons 'a (cons 'chicken 'cat))) returns T (listp (cons 'a (cons 'chicken 'cat))) returns T (list-length (cons 'a (cons 'chicken 'cat))) throws error CAT is not of type list nth 0, nth 1 works but nth 2 gives the same error It seems contradictory to...

I followed the famous Alexander Lehmann's ray tracer tutorial but unable to get the code to generate the PNG file as demonstrated in the show. Anybody can share the code which works? I have my code uploaded at http://www.youtube.com/watch?v=ksaM14iWFg0&feature=mfu_in_order&list=UL However, t...