From: Rusi <rustompmody@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Re: no empty (zero) string predicate in Elisp
Date: Sun, 26 Apr 2015 10:28:14 -0700 (PDT) [thread overview]
Message-ID: <093d7e9f-5049-4bf0-8ebb-3c1cb1b3db2d@googlegroups.com> (raw)
In-Reply-To: <87wq0zkqxa.fsf@debian.uxu>
On Sunday, April 26, 2015 at 6:01:15 PM UTC+5:30, Emanuel Berg wrote:
> Stefan Monnier writes:
>
> > I do wonder, why you'd rather write (empty-string-p
> > foo) instead of (equal "" foo) or (string= "" foo)
> > ... It's longer
>
> I don't mind typing. It is one of my favorite
> activities (in very stiff competition), especially
> when it only involves common words with chars that are
> close and super-fast to type: 'empty-string-p' is
> definitely more pleasant to type (and read) than
> 'string= ""' whereas 'equal ""' should be about
> "equally" pleasant to type, but still less so to read.
>
> > slower
>
> If that is true, which I suppose it is because it
> requires an extra function call, the difference should
> be close to infinitely small. I don't consider such
> quantities. Actually, I don't consider speed at all
> when I write Elisp. (But I never did any one big
> project that could gain from optimization, either.
> Still, I don't think I write slow code, in general.)
>
> When I told the other guy the other day that
> (make-string 10 ? ) is better than `dotimes' and
> (insert " ") 10 times, there I focus on the code
> rather than the speed - but those two (?) ways of
> thinking should work to each other's advantage
> most often.
>
> > not higher-level either
>
> I don't know the scientific definition of "high-level"
> - or how it applies to these three Elisp functions.
>
> The reason I want a binary operator is that it is more
> intuitive: it refects my way of thinking - "is the
> string empty?" vs. "is the string equal to another
> string that is empty?" - also, because a binary
> operator reduces the number of data items in the code
> (with one, the empty string).
>
> In general, I don't want the same function to be
> spelled out over and over to do the same thing -
> instead, I want it factored out, named, and invoked
> with a "minimal", that is, sufficient, interface.
>
> --
> underground experts united
> http://user.it.uu.se/~embe8573
Rather befuddled here...
Do you want or not want empty-string-p??
Your first post said you've defined it and you want it not in ELPA but emacs.
Now you are saying you want a binary -- presumably (== "" whatever).
next prev parent reply other threads:[~2015-04-26 17:28 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-25 3:44 no empty (zero) string predicate in Elisp Emanuel Berg
2015-04-25 9:26 ` Nicolas Petton
2015-05-16 9:23 ` Nicolas Petton
2015-05-16 13:22 ` Bozhidar Batsov
2015-05-16 13:28 ` Bozhidar Batsov
2015-05-16 13:36 ` Bozhidar Batsov
2015-05-16 13:46 ` Eli Zaretskii
2015-05-16 16:17 ` Bozhidar Batsov
2015-05-16 13:43 ` Stefan Monnier
2015-05-16 15:27 ` Drew Adams
[not found] ` <mailman.1583.1429954907.904.help-gnu-emacs@gnu.org>
2015-04-25 11:22 ` Emanuel Berg
2015-04-25 13:30 ` Stefan Monnier
[not found] ` <mailman.1591.1429968677.904.help-gnu-emacs@gnu.org>
2015-04-25 14:48 ` Pascal J. Bourguignon
2015-04-26 2:52 ` Stefan Monnier
2015-04-27 10:28 ` zerop: compiler macro vs defsubst (was: no empty (zero) string predicate in Elisp) Nicolas Richard
2015-04-27 12:19 ` zerop: compiler macro vs defsubst Stefan Monnier
[not found] ` <mailman.1626.1430016741.904.help-gnu-emacs@gnu.org>
2015-04-26 4:06 ` no empty (zero) string predicate in Elisp Pascal J. Bourguignon
2015-04-26 21:25 ` Stefan Monnier
2015-04-26 4:26 ` Rusi
2015-04-26 12:36 ` Emanuel Berg
2015-04-26 15:03 ` Pascal J. Bourguignon
2015-04-26 18:34 ` Emanuel Berg
2015-04-26 18:59 ` Marcin Borkowski
[not found] ` <mailman.1658.1430074770.904.help-gnu-emacs@gnu.org>
2015-04-26 19:06 ` Emanuel Berg
2015-04-26 20:11 ` Marcin Borkowski
[not found] ` <mailman.1662.1430079142.904.help-gnu-emacs@gnu.org>
2015-04-27 1:00 ` Emanuel Berg
2015-04-26 17:28 ` Rusi [this message]
2015-04-26 18:39 ` Emanuel Berg
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