From: Nikolaj Schumacher <me@nschum.de>
To: thierry.volpiatto@gmail.com
Cc: help-gnu-emacs@gnu.org
Subject: Re: case-insensitive string<
Date: Fri, 17 Apr 2009 23:04:43 +0200 [thread overview]
Message-ID: <m2prfbuh3o.fsf@nschum.de> (raw)
In-Reply-To: <87ab6fco9v.fsf@tux.homenetwork> (thierry volpiatto's message of "Fri, 17 Apr 2009 17:07:08 +0200")
thierry.volpiatto@gmail.com wrote:
> (sort* (list "abc" "abd" "abCde" "cade" "ABC") 'string< :key 'downcase)
> ("abc" "ABC" "abCde" "abd" "cade")
>
> But not sure it is faster than downcasing all strings before sorting.
> Need testing.
It's significantly slower.
It's the same as using:
(lambda (a b) (string< (downcase a) (downcase b)))
so that's O(n*log(n)) calls to downcase, instead of n.
regards,
Nikolaj Schumacher
next prev parent reply other threads:[~2009-04-17 21:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.5527.1239975614.31690.help-gnu-emacs@gnu.org>
2009-04-17 13:58 ` case-insensitive string< harven
2009-04-17 15:07 ` thierry.volpiatto
2009-04-17 21:04 ` Nikolaj Schumacher [this message]
2009-04-17 21:17 ` thierry.volpiatto
2009-04-17 17:01 ` Ted Zlatanov
2009-04-17 21:13 ` Nikolaj Schumacher
[not found] ` <mailman.5553.1240002838.31690.help-gnu-emacs@gnu.org>
2009-04-20 18:37 ` Ted Zlatanov
2009-04-17 13:40 Nikolaj Schumacher
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