From: Lars Ingebrigtsen <larsi@gnus.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Nix <nix@esperi.org.uk>, Emacs-devel@gnu.org
Subject: Re: CL package serious deficiencies
Date: Fri, 10 Feb 2012 16:24:55 +0100 [thread overview]
Message-ID: <8739aiogmw.fsf@gnus.org> (raw)
In-Reply-To: <jwvy5sa4vc5.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Fri, 10 Feb 2012 09:38:15 -0500")
Stefan Monnier <monnier@iro.umontreal.ca> writes:
> I've used incf occasionally, but don't find it terribly important.
I find it adds readability, since you don't have to see that
"(setq foo (1+ foo))" has the same `foo' both places.
>> `plusp'?
>
> Never used it. (> n 0) is no shorter than (plusp n) and is just as
> clear, so I really don't see the benefit.
Again, I think it's usually more readable, because (as with `zerop')
it's immediately obvious what the condition is. Especially with longer
parameters:
(plusp (1+ (foo-thing-that-computes-something)))
vs
(> (1+ (foo-thing-that-computes-something)) 0)
>> `delete-if-not'?
>
> That's the big one: some kind of "filter elements based on a predicate"
> is really handy and we definitely need to have this in core Elisp.
> OTOH I don't like the -if-not/-if duplication nor all the keyword
> arguments it takes, which just complicate significantly the
> implementation with very little benefit to the user/reader.
I think the `-if' and `-if-not' help with reading comprehension, because
you're signalling in the function name what you mean to do, and you
don't have to read the predicate as thoroughly. And the predicate can
be written clearer, too. If you don't have both forms, the predicate
often tends to look like `(lambda (foo) (not ...))', which makes my
brain hurt.
>> `position'?
>
> I think having cl-position (after (require 'cl-lib)) is good enough for
> this one (it's handy and more readable than the Elisp replacement, but
> it's not used often).
Hey, are we listing all the CL functions that we find most useful?
`mapcan', `some', `every', `notany', `reduce', `remove-duplicates'...
Uhm... I think that's it for me... (In addition to the ones
mentioned.)
--
(domestic pets only, the antidote for overdose, milk.)
http://lars.ingebrigtsen.no * Sent from my Rome
next prev parent reply other threads:[~2012-02-10 15:24 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-06 14:18 CL package serious deficiencies egnarts-ms
2012-02-06 21:08 ` Stefan Monnier
2012-02-06 21:53 ` Drew Adams
2012-02-07 3:02 ` Stefan Monnier
2012-02-07 12:04 ` egnarts-ms
2012-02-07 17:36 ` Stefan Monnier
2012-02-08 13:15 ` egnarts-ms
2012-02-08 19:07 ` Stefan Monnier
2012-02-07 12:29 ` egnarts-ms
2012-02-07 18:43 ` Nix
2012-02-07 19:11 ` Lennart Borgman
2012-02-07 19:15 ` Juanma Barranquero
2012-02-07 20:54 ` Lennart Borgman
2012-02-07 21:03 ` John Wiegley
2012-02-07 21:06 ` Nix
2012-02-07 21:08 ` Lennart Borgman
2012-02-07 21:10 ` Nix
2012-02-07 21:12 ` Lennart Borgman
2012-02-07 21:23 ` Nix
2012-02-07 21:29 ` Lennart Borgman
2012-02-07 21:30 ` Nix
2012-02-07 21:32 ` Glenn Morris
2012-02-07 21:34 ` Daniel Colascione
2012-02-07 21:42 ` Tom Tromey
2012-02-08 1:53 ` Leo
2012-02-07 22:16 ` Alan Mackenzie
2012-02-07 22:19 ` Nix
2012-02-08 13:28 ` Richard Stallman
2012-02-08 15:00 ` Tom Tromey
2012-02-09 6:29 ` Richard Stallman
2012-02-09 14:23 ` Eric Schulte
2012-02-10 15:44 ` Richard Stallman
2012-02-10 18:36 ` Tom Tromey
2012-02-10 15:52 ` Tom Tromey
2012-02-10 16:23 ` Drew Adams
2012-02-10 16:42 ` Ted Zlatanov
2012-02-09 6:30 ` Richard Stallman
2012-02-09 13:56 ` Ted Zlatanov
2012-02-10 15:44 ` Richard Stallman
2012-02-10 18:34 ` Tom Tromey
2012-02-10 15:48 ` Tom Tromey
2012-02-10 18:29 ` Stefan Monnier
2012-02-08 2:07 ` Stephen J. Turnbull
2012-02-07 22:41 ` Glenn Morris
2012-02-07 23:10 ` Nix
2012-02-08 13:42 ` Eric Schulte
2012-02-08 13:46 ` Lennart Borgman
2012-02-08 13:51 ` Eric Schulte
2012-02-08 15:29 ` Lennart Borgman
2012-02-08 15:39 ` Eric Schulte
2012-02-08 15:43 ` Lennart Borgman
2012-02-08 14:26 ` Drew Adams
2012-02-08 13:15 ` Teemu Likonen
2012-02-09 7:33 ` spam- or registry-related things in Gnus need cl at run-time? (was: CL package serious deficiencies) Reiner Steib
2012-02-09 16:39 ` spam- or registry-related things in Gnus need cl at run-time? Teemu Likonen
2012-02-07 23:48 ` CL package serious deficiencies Stefan Monnier
2012-02-07 23:52 ` Nix
2012-02-08 0:10 ` Lennart Borgman
2012-02-08 0:15 ` Nix
2012-02-08 1:51 ` Stefan Monnier
2012-02-08 23:43 ` Nix
2012-02-09 21:34 ` Stefan Monnier
2012-02-08 2:13 ` Stephen J. Turnbull
2012-02-08 2:19 ` Lennart Borgman
2012-02-08 4:23 ` Stephen J. Turnbull
2012-02-08 11:00 ` Lennart Borgman
2012-02-08 17:42 ` Richard Stallman
2012-02-08 19:54 ` Stefan Monnier
2012-02-08 0:38 ` Daniel Colascione
2012-02-08 1:32 ` Lennart Borgman
2012-02-08 1:53 ` Stefan Monnier
2012-02-08 2:26 ` Daniel Colascione
2012-02-08 22:28 ` Lars Ingebrigtsen
2012-02-08 22:32 ` Lennart Borgman
2012-02-08 23:35 ` Nix
2012-02-09 19:42 ` Richard Stallman
2012-02-09 19:46 ` Nix
2012-02-10 1:09 ` John Wiegley
2012-02-10 14:38 ` Stefan Monnier
2012-02-10 15:08 ` Juanma Barranquero
2012-02-10 15:35 ` Drew Adams
2012-02-10 18:15 ` Stefan Monnier
2012-02-10 18:21 ` Drew Adams
2012-02-10 15:24 ` Lars Ingebrigtsen [this message]
2012-02-10 18:24 ` Stefan Monnier
2012-02-10 18:26 ` Lars Ingebrigtsen
2012-02-10 18:47 ` Johan Bockgård
2012-02-10 17:12 ` Helmut Eller
2012-02-10 18:51 ` Stefan Monnier
2012-02-10 18:55 ` Lars Ingebrigtsen
2012-02-10 19:08 ` Teemu Likonen
2012-02-11 13:25 ` Juanma Barranquero
2012-02-11 16:56 ` Johan Bockgård
2012-02-11 22:33 ` Juanma Barranquero
2012-02-12 4:41 ` Stefan Monnier
2012-02-12 15:53 ` Teemu Likonen
2012-02-12 16:52 ` Stefan Monnier
2012-02-12 16:55 ` Stefan Monnier
2012-02-10 23:56 ` Helmut Eller
2012-02-12 4:47 ` Stefan Monnier
2012-02-12 17:39 ` Helmut Eller
2012-02-12 18:15 ` Stefan Monnier
2012-02-12 18:58 ` Helmut Eller
2012-02-19 12:52 ` Dimitri Fontaine
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