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From: "A. Soare" <alinsoar@voila.fr>
To: Deniz Dogan <deniz.a.m.dogan@gmail.com>
Cc: Stefan Monnier <monnier@iro.umontreal.ca>,
	"Emacs Dev \[emacs-devel\]" <emacs-devel@gnu.org>
Subject: Re: van Emde Boas hash.
Date: Fri, 20 Nov 2009 07:41:15 +0100 (CET)	[thread overview]
Message-ID: <24670838.273241258699275844.JavaMail.www@wwinf4616> (raw)


Van Emde Boas arrays are hashed arrays (of numbers for example), which have the property that all operations are realized into a constant number of steps.

For example, for an array of length 2^32, the complexity is O(0), and the number of steps is less than log_2 (32) = "maximum 5 steps" for every operation.

The operations are:

* insert a new number
* delete a number
* seek for a number
* find the successor of a number
* find the predecessor of a number



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             reply	other threads:[~2009-11-20  6:41 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-20  6:41 A. Soare [this message]
2009-11-23  4:06 ` van Emde Boas hash tomas
2009-11-23 14:39   ` A Soare
  -- strict thread matches above, loose matches on Subject: below --
2009-11-27 18:01 A. Soare
2009-11-23 14:04 A. Soare
2009-11-23 16:43 ` Stefan Monnier
2009-11-23 16:57   ` David Kastrup
2009-11-27  9:04   ` A Soare
2009-11-22 12:35 A. Soare
2009-11-23  2:25 ` Stefan Monnier
2009-11-19 12:04 A. Soare
2009-11-19 15:23 ` Stefan Monnier
2009-11-19 16:44   ` Deniz Dogan
2009-11-27  9:14   ` A Soare
2009-11-27 16:56     ` Stefan Monnier

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