Groups > comp.lang.java.programmer > #8026

Re: Using Java Classes to Sort a Small Array Quickly

From	Gene Wirchenko <genew@ocis.net>
Newsgroups	comp.lang.java.programmer
Subject	Re: Using Java Classes to Sort a Small Array Quickly
Date	2011-09-14 11:00 -0700
Organization	A noiseless patient Spider
Message-ID	<rqq177d3rbak4j8kkpfb29ab84mkk2mm63@4ax.com> (permalink)
References	(5 earlier) <fuhs67lrl26ubtv16brfg56c4kueldb28k@4ax.com> <4e6e8f47$0$308$14726298@news.sunsite.dk> <j4mblo$p46$1@dont-email.me> <j4mgb0$h1c$1@dont-email.me> <4e700893$0$311$14726298@news.sunsite.dk>

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On Tue, 13 Sep 2011 21:51:13 -0400, Arne Vajhøj <arne@vajhoej.dk>
wrote:

>On 9/12/2011 10:49 PM, markspace wrote:
>>> On 9/12/2011 7:01 PM, Arne Vajhøj wrote:
>>>> No - big O for algorithms is usual average case not worst case.
>>
>> I'm pretty sure that is not correct. Quoting Wikipedia:
>>
>> "Informally, especially in computer science, the Big O notation often is
>> permitted to be somewhat abused to describe an asymptotic tight bound
>> where using Big Theta ? notation might be more factually appropriate in
>> a given context."
>>
>> That is to say, Big O is the upper bound. Big Theta is the average case
>> or the expected case.
>>
>> <http://en.wikipedia.org/wiki/Big_O_notation>
>
>I don't think upper bound in this case means worst case.

     Well, yes, it is.  That is why it is the upper bound.  If a worse
case were possible, then that limit would not be the upper bound.

[snip]

Sincerely,

Gene Wirchenko

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Thread

Re: Using Java Classes to Sort a Small Array Quickly Wanja Gayk <brixomatic@yahoo.com> - 2011-09-11 23:14 +0200
  Re: Using Java Classes to Sort a Small Array Quickly Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-11 17:53 -0400
    Re: Using Java Classes to Sort a Small Array Quickly Wanja Gayk <brixomatic@yahoo.com> - 2011-09-12 01:40 +0200
      Re: Using Java Classes to Sort a Small Array Quickly Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-11 20:32 -0400
        Re: Using Java Classes to Sort a Small Array Quickly Wanja Gayk <brixomatic@yahoo.com> - 2011-09-17 02:54 +0200
          Re: Using Java Classes to Sort a Small Array Quickly Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-16 21:03 -0400
            Re: Using Java Classes to Sort a Small Array Quickly Wanja Gayk <brixomatic@yahoo.com> - 2011-09-17 16:52 +0200
              Re: Using Java Classes to Sort a Small Array Quickly Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-17 11:05 -0400
                Re: Using Java Classes to Sort a Small Array Quickly Wanja Gayk <brixomatic@yahoo.com> - 2011-09-18 15:41 +0200
                Re: Using Java Classes to Sort a Small Array Quickly Lew <lewbloch@gmail.com> - 2011-09-18 12:53 -0700
                Re: Using Java Classes to Sort a Small Array Quickly Patricia Shanahan <pats@acm.org> - 2011-09-18 13:20 -0700
      Re: Using Java Classes to Sort a Small Array Quickly Arne Vajhøj <arne@vajhoej.dk> - 2011-09-11 21:10 -0400
        Re: Using Java Classes to Sort a Small Array Quickly Lew <lewbloch@gmail.com> - 2011-09-11 20:30 -0700
          Re: Using Java Classes to Sort a Small Array Quickly Arne Vajhøj <arne@vajhoej.dk> - 2011-09-12 19:13 -0400
            Re: Using Java Classes to Sort a Small Array Quickly Lew <lewbloch@gmail.com> - 2011-09-12 17:42 -0700
              Re: Using Java Classes to Sort a Small Array Quickly Wanja Gayk <brixomatic@yahoo.com> - 2011-09-17 02:54 +0200
                Re: Using Java Classes to Sort a Small Array Quickly Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-16 21:13 -0400
                Re: Using Java Classes to Sort a Small Array Quickly Patricia Shanahan <pats@acm.org> - 2011-09-16 23:14 -0700
                Re: Using Java Classes to Sort a Small Array Quickly Wanja Gayk <brixomatic@yahoo.com> - 2011-09-17 16:53 +0200
            Re: Using Java Classes to Sort a Small Array Quickly Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-12 21:24 -0400
      Re: Using Java Classes to Sort a Small Array Quickly Gene Wirchenko <genew@ocis.net> - 2011-09-12 10:57 -0700
        Re: Using Java Classes to Sort a Small Array Quickly Arne Vajhøj <arne@vajhoej.dk> - 2011-09-12 19:01 -0400
          Re: Using Java Classes to Sort a Small Array Quickly Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-12 21:29 -0400
            Re: Using Java Classes to Sort a Small Array Quickly markspace <-@.> - 2011-09-12 19:49 -0700
              Re: Using Java Classes to Sort a Small Array Quickly Lew <lewbloch@gmail.com> - 2011-09-12 21:51 -0700
              Re: Using Java Classes to Sort a Small Array Quickly Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-09-13 11:32 -0500
              Re: Using Java Classes to Sort a Small Array Quickly Arne Vajhøj <arne@vajhoej.dk> - 2011-09-13 21:51 -0400
                Re: Using Java Classes to Sort a Small Array Quickly Gene Wirchenko <genew@ocis.net> - 2011-09-14 11:00 -0700
            Re: Using Java Classes to Sort a Small Array Quickly Patricia Shanahan <pats@acm.org> - 2011-09-13 06:33 -0700
          Re: Using Java Classes to Sort a Small Array Quickly Gene Wirchenko <genew@ocis.net> - 2011-09-13 09:48 -0700

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