From ... Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!news2.kpn.net!news.kpn.net!nslave.kpnqwest.net!nloc2.kpnqwest.net!nloc.kpnqwest.net!nmaster.kpnqwest.net!nreader2.kpnqwest.net.POSTED!not-for-mail Newsgroups: comp.lang.lisp Subject: Re: Newbie stumped on list element manipulation. References: <3BC99ECC.5E4D5A22@aracnet.com> Mail-Copies-To: never From: Erik Naggum Message-ID: <3212063602159981@naggum.net> Organization: Naggum Software, Oslo, Norway Lines: 21 User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sun, 14 Oct 2001 15:53:22 GMT X-Complaints-To: newsmaster@Norway.EU.net X-Trace: nreader2.kpnqwest.net 1003074802 193.90.207.43 (Sun, 14 Oct 2001 17:53:22 MET DST) NNTP-Posting-Date: Sun, 14 Oct 2001 17:53:22 MET DST Xref: archiver1.google.com comp.lang.lisp:17795 * John Jaynes | 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.