From: Sarir Khamsi <sarir.khamsi@raytheon.com>
To: help-gnu-emacs@gnu.org
Subject: Advice on writing predicates
Date: Thu, 25 Jun 2009 15:27:19 -0700 [thread overview]
Message-ID: <uhby454qg.fsf@raytheon.com> (raw)
I wrote a simple predicate that returns t if the Emacs major version
number is greater than 22 and would like some advice/comments:
The following
(defun sk-emacs-version-greater-than23-p ()
"Return non-nil if current Emacs version is greater than 22."
(interactive)
(setq version-string (replace-regexp-in-string ".*?\\([0-9]+\\)\.\\([0-9]+\\)\.\\([0-9]+\\)[()-.a-zA-Z0-9 \n]+" "\\1 \\2 \\3" (emacs-version)))
(setq version-num (mapcar 'string-to-number (split-string version-string)))
(if (> 22 (car version-num))
t
nil))
seems to work. I know that I don't need to save \2 and \3 but wanted
that for a later function. Any comments or suggestions on how to make
this better? Thanks.
Sarir
--
Sarir Khamsi
software guy
sarir.khamsi@raytheon.com
next reply other threads:[~2009-06-25 22:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-25 22:27 Sarir Khamsi [this message]
2009-06-25 23:23 ` Advice on writing predicates Anselm Helbig
2009-06-29 19:18 ` chickenphat
2009-06-26 6:40 ` Daniel Pittman
2009-06-26 7:37 ` Andreas Röhler
2009-06-26 9:13 ` Pascal J. Bourguignon
2009-06-26 11:02 ` Thien-Thi Nguyen
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