From: Barry Margolin <barmar@alum.mit.edu>
To: help-gnu-emacs@gnu.org
Subject: Re: obarray
Date: Mon, 16 Dec 2013 12:44:31 -0500 [thread overview]
Message-ID: <barmar-941F9A.12443116122013@news.eternal-september.org> (raw)
In-Reply-To: 87txeaxb4l.fsf@nl106-137-194.student.uu.se
In article <87txeaxb4l.fsf@nl106-137-194.student.uu.se>,
Emanuel Berg <embe8573@student.uu.se> wrote:
> Barry Margolin <barmar@alum.mit.edu> writes:
>
> > uninterned-symbol is an interned symbol. Its *value*
> > is the symbol foo, which is not interned; foo
> > shouldn't show up in the function you wrote earlier
> > in the thread; unless you happen to have interned
> > some other symbol by that name -- it would probably
> > be clearer if I'd done:
> >
> > (setq uninterned-symbol (make-symbol
> > "something-you-have-never-typed"))
>
> OK, get it, thank you.
>
> > Now try your function and see if
> > something-you-have-never-typed shows up.
> >
> > The value of the symbol
> > something-you-have-never-typed would then be bar.
>
> Is there a way to confirm this? How can I access a
> symbol's value, if the symbol isn't in the obarray? If
> it isn't in the obarray, where is it? Is there a buffer
> and/or "scope" (i.e. form or process) local/temporary
> object array or anything of the like?
You can access it the same way you can access the contents of arrays and
lists -- by getting to it from some other variable (or cons cell or
array element) that references it. That's what the variable
uninterned-symbol is for.
(symbol-value uninterned-symbol) => bar
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
next prev parent reply other threads:[~2013-12-16 17:44 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-15 0:54 obarray Emanuel Berg
2013-12-15 1:14 ` obarray Juanma Barranquero
[not found] ` <mailman.9268.1387070101.10748.help-gnu-emacs@gnu.org>
2013-12-15 1:37 ` obarray Emanuel Berg
2013-12-15 1:56 ` obarray Michael Heerdegen
2013-12-15 1:59 ` obarray Juanma Barranquero
[not found] ` <mailman.9271.1387072648.10748.help-gnu-emacs@gnu.org>
2013-12-15 4:17 ` obarray Emanuel Berg
2013-12-15 4:17 ` obarray Barry Margolin
2013-12-15 4:47 ` obarray Michael Heerdegen
2013-12-15 4:55 ` obarray Emanuel Berg
2013-12-15 6:04 ` obarray Barry Margolin
2013-12-15 17:43 ` obarray Emanuel Berg
2013-12-16 17:44 ` Barry Margolin [this message]
2013-12-17 1:47 ` obarray Michael Heerdegen
[not found] ` <mailman.9442.1387244871.10748.help-gnu-emacs@gnu.org>
2013-12-17 2:11 ` obarray Emanuel Berg
2013-12-17 2:55 ` obarray Michael Heerdegen
[not found] ` <mailman.9452.1387248989.10748.help-gnu-emacs@gnu.org>
2013-12-17 3:01 ` obarray Emanuel Berg
2013-12-17 17:32 ` obarray Barry Margolin
2013-12-17 17:42 ` obarray Emanuel Berg
[not found] ` <mailman.9279.1387082898.10748.help-gnu-emacs@gnu.org>
2013-12-15 5:11 ` obarray Emanuel Berg
2013-12-15 5:36 ` obarray Emanuel Berg
2013-12-15 6:17 ` obarray Michael Heerdegen
[not found] ` <mailman.9283.1387088419.10748.help-gnu-emacs@gnu.org>
2013-12-15 17:51 ` obarray Emanuel Berg
2013-12-15 6:15 ` obarray Michael Heerdegen
[not found] ` <mailman.9282.1387088166.10748.help-gnu-emacs@gnu.org>
2013-12-15 17:47 ` obarray Emanuel Berg
2013-12-15 5:58 ` obarray Barry Margolin
2013-12-15 17:28 ` obarray Emanuel Berg
2013-12-17 14:38 ` obarray jack-mac
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