From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: empty-line-p
Date: Fri, 30 Mar 2007 01:36:00 -0400 [thread overview]
Message-ID: <jwv648j70t5.fsf-monnier+gnu.emacs.help@gnu.org> (raw)
In-Reply-To: mailman.1577.1175177310.7795.help-gnu-emacs@gnu.org
> (if (looking-at "^[ \t\f\r]*$")
> t
> nil)))
(if <foo> t nil)
is an eta-regexp, which can be advantageously reduced to just <foo>.
Stefan
PS: The classical eta-regexp is (lambda (x) (<foo> x)), which is equivalent to
just <foo>. Another variant is (cons (car <foo>) (cdr <foo>)), which
eta-reduces to just <foo>.
next prev parent reply other threads:[~2007-03-30 5:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1577.1175177310.7795.help-gnu-emacs@gnu.org>
2007-03-29 14:32 ` empty-line-p Joost Kremers
2007-03-30 8:56 ` empty-line-p David Hansen
2007-03-31 5:49 ` empty-line-p Andreas Roehler
2007-03-31 15:17 ` empty-line-p Xavier Maillard
2007-04-06 14:44 ` empty-line-p Andreas Roehler
[not found] ` <mailman.1621.1175289074.7795.help-gnu-emacs@gnu.org>
2007-04-01 20:57 ` empty-line-p Stefan Monnier
2007-03-30 5:36 ` Stefan Monnier [this message]
2007-03-30 5:46 ` empty-line-p Barry Margolin
2007-04-01 20:54 ` empty-line-p Stefan Monnier
2007-03-30 6:14 ` empty-line-p Andreas Roehler
2007-03-29 13:06 empty-line-p Andreas Roehler
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