From: PJ Weisberg <pj@irregularexpressions.net>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: help-gnu-emacs@gnu.org
Subject: Re: Is add-to-list supposed to work when lexical-binding is t?
Date: Tue, 4 Jun 2013 08:24:04 -0700 [thread overview]
Message-ID: <CAJsNXT=da5V5OTAAfyPEuR9aDoNs+Y4gmfb1SZjcFYBxyFBF-A@mail.gmail.com> (raw)
In-Reply-To: <jwvr4giwt3x.fsf-monnier+gmane.emacs.help@gnu.org>
On Mon, Jun 3, 2013 at 6:49 PM, Stefan Monnier <monnier@iro.umontreal.ca>wrote:
>
> > (let ((x '(a))) (add-to-list 'x 'b) x) -> (b a)
>
> Yup, this is asking for trouble. Use `push' or `cl-pushnew' instead.
>
>
Unless you're knee-deep in the internals of the language, the difference
between `cl-pushnew' and `add-to-list' is so obscure as to be
incomprehensible.
-PJ
Gehm's Corollary to Clark's Law: Any technology distinguishable from
magic is insufficiently advanced.
next prev parent reply other threads:[~2013-06-04 15:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-04 0:42 Is add-to-list supposed to work when lexical-binding is t? Kelly Dean
2013-06-04 1:49 ` Stefan Monnier
2013-06-04 15:24 ` PJ Weisberg [this message]
2013-06-05 2:41 ` Stefan Monnier
-- strict thread matches above, loose matches on Subject: below --
2013-06-05 23:12 Kelly Dean
2013-06-06 0:42 ` Stefan Monnier
2013-06-10 1:43 Kelly Dean
2013-06-10 7:56 ` Stefan Monnier
[not found] <mailman.1311.1370828650.22516.help-gnu-emacs@gnu.org>
2013-06-10 5:12 ` Barry Margolin
2013-06-12 0:59 Kelly Dean
[not found] <mailman.1450.1370998793.22516.help-gnu-emacs@gnu.org>
2013-06-13 14:57 ` Stefan Monnier
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