From: Tino Calancha <f92capac@gmail.com>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: Constantino Calancha <f92capac@gmail.com>,
"21782@debbugs.gnu.org" <21782@debbugs.gnu.org>
Subject: bug#21782: 25.0.50; New functions nfront/front
Date: Sat, 31 Oct 2015 03:06:40 +0900 (JST) [thread overview]
Message-ID: <alpine.LRH.2.20.1510310251500.15175@calancha-ilc.kek.jp> (raw)
In-Reply-To: <87a8r0sb21.fsf@web.de>
>
> `nreverse` efficiently does what is supposed to do, yes. But it is
> O(l), where l is the length of the list arg.
>
> In addition, the newly created `nreverse'd list must be garbage
> collected.
>
> The `copy-sequence' call in `front' is bad for the same reason.
>
> OTOH nfront can be implemented in O(n), where n is the number argument
> to nfront.
Thank you Michael for the detail answer. I appreciate it a lot.
Now i see clearly what you mean.
For all the people:
Efficiency implementations are very important, almost as important as
have things available.
One emacs user starting one session has no available seq-take. That is
the first thing to care, efficiency comes later.
Many users learn the lenguage autocompleting in the minibuffer. If it is
not loaded the least people will realize such functions you are
developping do exists. We develop tools to be used, not ust to be nice.
IMOP, fundamental operations should be loaded by default. If this is not
the case, that means the function should not be located in its corrent
location: fair and simple.
Please, consider make this fundamental operation being loaded at the
beginning. Thanks.
I finish here because i start to repeat myself. Thank you for the very
nice chat; it has being very instructive for me and i enjoied very much.
next prev parent reply other threads:[~2015-10-30 18:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-29 9:57 bug#21782: 25.0.50; New functions nfront/front Tino Calancha
2015-10-29 15:25 ` Artur Malabarba
2015-10-30 1:25 ` Tino Calancha
2015-10-30 2:38 ` Michael Heerdegen
2015-10-30 2:53 ` Constantino Calancha
2015-10-30 9:45 ` Artur Malabarba
2015-10-30 10:10 ` Tino Calancha
2015-10-30 10:03 ` Nicolas Petton
2015-10-30 10:11 ` Tino Calancha
2015-10-30 14:09 ` Michael Heerdegen
2015-10-30 18:06 ` Tino Calancha [this message]
2015-10-30 2:10 ` Tino Calancha
2015-10-30 1:33 ` Richard Stallman
2015-10-30 1:41 ` Constantino Calancha
[not found] ` <mailman.1293.1446168906.7904.bug-gnu-emacs@gnu.org>
2015-10-31 22:44 ` Alan Mackenzie
2017-05-18 4:08 ` Tino Calancha
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