Subject: Re: Newbie stumped on list element manipulation. From: Erik Naggum <email@example.com> Date: Sun, 14 Oct 2001 15:53:22 GMT Newsgroups: comp.lang.lisp Message-ID: <firstname.lastname@example.org> * John Jaynes <email@example.com> | I am a student, trying to figure out how to perform a one argument | operation on individual list elements, returning a list with the same | level structure: | | (ImHosed #'numberp '((1) ((a)) 3 4 (b))) -> returns ((T) ((NIL)) T | T (NIL)) | | I am not sure if this a suitable post for this group. Apologies if this | is not. You should say something about what you have tried. For instance, do you know of a function that maps over the cars of a list? Do you know of a function that find the first non-cons car of a cons? /// -- The United Nations before and after the leadership of Kofi Annan are two very different organizations. The "before" United Nations did not deserve much credit and certainly not a Nobel peace prize. The "after" United Nations equally certainly does. I applaud the Nobel committee's choice.