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Re: `append' vs. `nconc'
From: |
Emanuel Berg |
Subject: |
Re: `append' vs. `nconc' |
Date: |
Fri, 01 Jan 2016 14:31:36 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
"Pascal J. Bourguignon" <pjb@informatimago.com>
writes:
> list returns a fresh list. ` doesn't. ` may return
> a structure that shares literal substructures
> with others.
I have lots of ' and ` and instead of examining all
those cases I think it is easier to look for the
mutators, and see if ' or ` are used in
their vicinity.
I found this page:
http://www.emacswiki.org/emacs/DestructiveOperations
> It's simplier to forget about set and setq, and
> always use setf.
Oh, no! I have 207 `setq' in my initialization!
> That frees two neurons to think about other things.
I think we have spent too much time together lately:
now we are starting to *think* the same way!
--
underground experts united
http://user.it.uu.se/~embe8573