From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Pascal J. Bourguignon" Newsgroups: gmane.emacs.help Subject: Re: How to quote a list of functions? Date: Sun, 09 Aug 2015 03:23:26 +0200 Organization: Informatimago Message-ID: <877fp5i7ap.fsf@kuiper.lan.informatimago.com> References: <87fv3ti9r4.fsf@kuiper.lan.informatimago.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1439083524 7983 80.91.229.3 (9 Aug 2015 01:25:24 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 9 Aug 2015 01:25:24 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Aug 09 03:25:19 2015 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZOFMT-0004Lv-KR for geh-help-gnu-emacs@m.gmane.org; Sun, 09 Aug 2015 03:25:17 +0200 Original-Received: from localhost ([::1]:54141 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZOFMS-0007eC-GA for geh-help-gnu-emacs@m.gmane.org; Sat, 08 Aug 2015 21:25:16 -0400 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 30 Original-X-Trace: individual.net jLagBrTOBt+iCjWm8MgZegm479I3Poo82iwNzWmVavCn8VCwGk Cancel-Lock: sha1:MzVjOTE5NmIxMWEwY2JlMWU0MjUwZGI3MTkyMDU3NjVhN2I2YmFiYQ== sha1:+2fXC8zx2/VXY0PaX/yZxmYx/A0= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Original-Xref: usenet.stanford.edu gnu.emacs.help:214081 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:106366 Archived-At: Michael Heerdegen writes: > "Pascal J. Bourguignon" writes: > >> The difference, in emacs lisp, is when you compile a lambda form. > > AFAIK, there is also a difference for function names when compiling: > using #'fun you enable checking whether `fun' is defined, using 'fun, it > is not checked. So it is preferable to use #' for symbols intended to > be used as a function. Agreed. However, my conclusion is that if you want to designate a list of (global) functions, you can easily do it by having a literal list of symbols naming those functions: (defvar *trigs* '(sin cos tan)) (mapcar (lambda (f) (funcall f (/ pi 3))) *trigs*) --> (0.8660254037844386 0.5000000000000001 1.7320508075688767) I wouldn't lose sleep over: (defvar *trigs* (list (function sin) (function cos) (function tan))) -- __Pascal Bourguignon__ http://www.informatimago.com/ “The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment.” -- Carl Bass CEO Autodesk