tag:blogger.com,1999:blog-1872817975428307009.post3533334509871158542..comments2009-05-07T20:40:27.801-07:00Comments on cse471/598 Intro to AI Spring 2009 Blog: lisp questionSubbarao Kambhampatihttp://www.blogger.com/profile/08449853328445416609noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-1872817975428307009.post-19726821187866751662009-02-08T23:36:00.000-08:002009-02-08T23:36:00.000-08:00Try this:CL-USER> (setq x (make-thing :a 2 :b 3...Try this:<BR/><BR/>CL-USER> (setq x (make-thing :a 2 :b 3 :c (+ (thing-a x) (thing-b x))))<BR/><BR/>#S(THING :A 2 :B 3 :C 5)<BR/><BR/>I guess you cannot use :a or :b as they are just the keys binding positional parameters and do not have a value associated with them.Anonymoushttps://www.blogger.com/profile/04384679212197552908noreply@blogger.com