git.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "brian m. carlson" <sandals@crustytoothpaste.net>
To: Jonathan Nieder <jrnieder@gmail.com>
Cc: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Jeff King" <peff@peff.net>,
	git@vger.kernel.org, "Tim Schumacher" <timschumi@gmx.de>,
	gitster@pobox.com, pclouds@gmail.com
Subject: Re: ordered string-list considered harmful, was Re: [PATCH v3] Allow aliases that include other aliases
Date: Sat, 8 Sep 2018 16:49:00 +0000	[thread overview]
Message-ID: <20180908164900.GP432229@genre.crustytoothpaste.net> (raw)
In-Reply-To: <20180907072353.GC172953@aiede.svl.corp.google.com>

[-- Attachment #1: Type: text/plain, Size: 866 bytes --]

On Fri, Sep 07, 2018 at 12:23:53AM -0700, Jonathan Nieder wrote:
> Ævar Arnfjörð Bjarmason wrote:
> > If this turns out to be a common use-case perhaps the easiest way to
> > support that would be to make the hashmap (optionally?) ordered, as Ruby
> > 1.9 did with their hash implementation:
> > https://www.igvita.com/2009/02/04/ruby-19-internals-ordered-hash/
> 
> That's about recording the order of insertion.  I'm talking about
> something much simpler: sorting an array (as preparation for emitting
> it) and binary searching to find an entry in that array.

If you want both a collection that is always sorted and has efficient
lookup for an arbitrary entry, then a B-tree is probably a better
choice.  That's the primitive that Rust provides for that situation.
-- 
brian m. carlson: Houston, Texas, US
OpenPGP: https://keybase.io/bk2204

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 868 bytes --]

  reply	other threads:[~2018-09-08 16:49 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-06 19:12 Jeff King
2018-09-06 19:20 ` Jeff King
2018-09-06 23:50   ` Jonathan Nieder
2018-09-07  3:24     ` Jeff King
2018-09-07  6:32       ` Jonathan Nieder
2018-09-07  7:20         ` Ævar Arnfjörð Bjarmason
2018-09-07  7:23           ` Jonathan Nieder
2018-09-08 16:49             ` brian m. carlson [this message]
2018-09-07 14:48         ` Jeff King
2018-09-06 20:04 ` Stefan Beller
2018-09-06 20:49   ` Jeff King
2018-09-06 20:54     ` Stefan Beller
2018-09-07  3:12       ` Jeff King

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180908164900.GP432229@genre.crustytoothpaste.net \
    --to=sandals@crustytoothpaste.net \
    --cc=avarab@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    --cc=jrnieder@gmail.com \
    --cc=pclouds@gmail.com \
    --cc=peff@peff.net \
    --cc=timschumi@gmx.de \
    --subject='Re: ordered string-list considered harmful, was Re: [PATCH v3] Allow aliases that include other aliases' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).