From: steved@pacifier.com (Steve Doiel)
Subject: Re: Anyone help develop an algorythm?
Date: 1997/04/22
Date: 1997-04-22T00:00:00+00:00 [thread overview]
Message-ID: <5jhae2$l62$1@news.pacifier.com> (raw)
In-Reply-To: E8yGpJ.Dyu@world.std.com
In article <E8yGpJ.Dyu@world.std.com>, bobduff@world.std.com says...
>
>In article <5jddg7$uf0@newssvr01-int.news.prodigy.com>,
>Matthew Givens <NKSW39B@prodigy.com> wrote:
>>I have a linked list, each node corresponding to an array (contiguous in
>>memory) of fixed length strings. ...
>
>Perhaps you should construct an array on the side, containing pointers
>to all the strings. Then sort that, using your favorite (fast) sorting
>algorithm.
>
>Constructing the array can be done in linear time. You can walk the
>list once to determine the size of the array. Or perhaps your program
>already knows the size. Or perhaps it knows some reasonable upper bound
>on the size. Then walk the list again, putting pointers to each string
>in the array. (The strings need to be "aliased".) Then do the sort.
>
>- Bob
Agreed... but with two notes:
1) Check out the PAL to see if you can use an "off the shelf" sort... the
last thing you should have to do is implement a sort _again_
(what ever happened to software re-use?).
2) The strings do not necesarily need to be aliased if each element in
your array contains a pointer to the array and in index to the element,
although the aliased approach is likely to be more efficient.
Steve Doiel
next prev parent reply other threads:[~1997-04-22 0:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-04-20 0:00 Anyone help develop an algorythm? Matthew Givens
1997-04-20 0:00 ` Robert A Duff
1997-04-22 0:00 ` Steve Doiel [this message]
1997-04-20 0:00 ` Joel VanLaven
1997-04-22 0:00 ` Robert Dewar
1997-04-20 0:00 ` Robert Dewar
1997-04-23 0:00 ` Matthew Givens
1997-04-23 0:00 ` Robert Dewar
1997-04-20 0:00 ` Tucker Taft
1997-04-20 0:00 ` Tom Moran
1997-04-22 0:00 ` Michael F Brenner
[not found] ` <e8yijs.fg1.0.-s@inmet.camb.inmet.com>
1997-04-23 0:00 ` Matthew Givens
1997-04-23 0:00 ` Robert Dewar
1997-04-28 0:00 ` Matthew Givens
1997-04-23 0:00 ` Tucker Taft
[not found] ` <335af137.54d7@bix.com>
1997-04-28 0:00 ` Matthew Givens
1997-04-28 0:00 ` Robert Dewar
1997-04-29 0:00 ` Matthew Givens
-- strict thread matches above, loose matches on Subject: below --
1997-04-24 0:00 Marin David Condic, 561.796.8997, M/S 731-93
1997-04-25 0:00 ` Michael F Brenner
1997-04-28 0:00 ` Matthew Givens
1997-04-28 0:00 ` Matthew Givens
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