From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=) Newsgroups: gmane.lisp.guile.user Subject: Re: Potluck dish - Simple functional reactive programming Date: Sun, 16 Feb 2014 20:06:21 +0100 Message-ID: <87eh32vpw2.fsf@gnu.org> References: <87ob26x61e.fsf@izanagi.i-did-not-set--mail-host-address--so-tickle-me> 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 1392582876 22534 80.91.229.3 (16 Feb 2014 20:34:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 16 Feb 2014 20:34:36 +0000 (UTC) To: guile-user@gnu.org Original-X-From: guile-user-bounces+guile-user=m.gmane.org@gnu.org Sun Feb 16 21:34:44 2014 Return-path: Envelope-to: guile-user@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 1WF8QF-0005Vl-L2 for guile-user@m.gmane.org; Sun, 16 Feb 2014 21:34:43 +0100 Original-Received: from localhost ([::1]:34934 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WF8QE-0003hQ-Tm for guile-user@m.gmane.org; Sun, 16 Feb 2014 15:34:42 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41029) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WF735-0004wd-4Y for guile-user@gnu.org; Sun, 16 Feb 2014 14:06:49 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WF72y-0006Ho-WD for guile-user@gnu.org; Sun, 16 Feb 2014 14:06:43 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:59537) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WF72y-0006HX-Pv for guile-user@gnu.org; Sun, 16 Feb 2014 14:06:36 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1WF72u-0000cY-Kb for guile-user@gnu.org; Sun, 16 Feb 2014 20:06:32 +0100 Original-Received: from reverse-83.fdn.fr ([80.67.176.83]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 16 Feb 2014 20:06:32 +0100 Original-Received: from ludo by reverse-83.fdn.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 16 Feb 2014 20:06:32 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 24 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: reverse-83.fdn.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 28 =?utf-8?Q?Pluvi=C3=B4se?= an 222 de la =?utf-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 83C4 F8E5 10A3 3B4C 5BEA D15D 77DD 95E2 EA52 ECF4 X-OS: x86_64-unknown-linux-gnu User-Agent: Gnus/5.130007 (Ma Gnus v0.7) Emacs/24.3 (gnu/linux) Cancel-Lock: sha1:RtSVp53O7Q4KfzUt1hbLMbXDdn0= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-Mailman-Approved-At: Sun, 16 Feb 2014 15:34:28 -0500 X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guile-user-bounces+guile-user=m.gmane.org@gnu.org Original-Sender: guile-user-bounces+guile-user=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.user:11064 Archived-At: David Thompson skribis: > This code isn't terrible, but wouldn't it be nice to declare that > 'gc-label' will always contain a string with the number of GC runs in > it instead? Enter FRP: > > (define gc-label-position (vector2 0 40)) > (define gc-counter (make-root-signal 0)) > (define gc-label > (signal-map (lambda (counter) > (let ((text (format #f "GCs: ~d" counter))) > (make-label font text gc-label-position))) > gc-counter)) > > (add-hook! after-gc-hook > (lambda () > (signal-set! gc-counter (1+ (signal-ref gc-counter))))) Neat! I’m a big fan. I think we should consider adding an FRP module to Guile eventually. Cheers, Ludo’.