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Groups > comp.lang.java.programmer > #14378

Re: Sorting numeric strings

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On Mon, 7 May 2012 17:48:55 +0000 (UTC), glen herrmannsfeldt
<gah@ugcs.caltech.edu> wrote:

>Gene Wirchenko <genew@ocis.net> wrote:
>
>(snip)
>>     Floating point can represent some integer values exactly.  The
>> IEEE 754 64-bit format has 53 bits of precision.  This is not quite 16
>> digits of precision.  Stick with integer values in the range
>> (-10^15,10^15) (an exclusive range), and they will all be represented
>> exactly.
>
>I believe that addition, subtraction, and multiplication should
>give the right answer as long as it stays within range.
>
>Divide is less obvious. Are you sure that there are no cases
>where divide will round incorrectly?

     I have not dealt with division since I do not need it in general.

     I do need rounding though, and I use modulo to do that.  Were I
to need division, I would round the same way.

Sincerely,

Gene Wirchenko

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Thread

Sorting numeric strings Ben <no@way.com> - 2012-04-30 21:27 -0400
  Re: Sorting numeric strings Arne Vajhøj <arne@vajhoej.dk> - 2012-04-30 21:39 -0400
  Re: Sorting numeric strings Gene Wirchenko <genew@ocis.net> - 2012-05-01 10:30 -0700
  Re: Sorting numeric strings Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-05-01 10:53 -0700
    Re: Sorting numeric strings Roedy Green <see_website@mindprod.com.invalid> - 2012-05-01 14:50 -0700
      Re: Sorting numeric strings Patricia Shanahan <pats@acm.org> - 2012-05-01 15:02 -0700
        Re: Sorting numeric strings Roedy Green <see_website@mindprod.com.invalid> - 2012-05-02 14:36 -0700
          Re: Sorting numeric strings Gene Wirchenko <genew@ocis.net> - 2012-05-02 19:57 -0700
          Re: Sorting numeric strings Dr J R Stockton <reply1218@merlyn.demon.co.uk.not.invalid> - 2012-05-03 19:41 +0100
            Re: Sorting numeric strings Roedy Green <see_website@mindprod.com.invalid> - 2012-05-03 17:40 -0700
              Re: Sorting numeric strings Lew <lewbloch@gmail.com> - 2012-05-03 18:11 -0700
                Re: Sorting numeric strings Martin Gregorie <martin@address-in-sig.invalid> - 2012-05-04 20:01 +0000
                Re: Sorting numeric strings Gene Wirchenko <genew@ocis.net> - 2012-05-04 14:19 -0700
                Re: Sorting numeric strings Martin Gregorie <martin@address-in-sig.invalid> - 2012-05-04 23:36 +0000
                Re: Sorting numeric strings Dr J R Stockton <reply1218@merlyn.demon.co.uk.not.invalid> - 2012-05-06 17:50 +0100
                Re: Sorting numeric strings Gene Wirchenko <genew@ocis.net> - 2012-05-07 10:34 -0700
                Re: Sorting numeric strings Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-05-07 12:38 -0500
                Re: Sorting numeric strings glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-05-07 17:48 +0000
                Re: Sorting numeric strings Gene Wirchenko <genew@ocis.net> - 2012-05-07 11:42 -0700
  Re: Sorting numeric strings Roedy Green <see_website@mindprod.com.invalid> - 2012-05-01 13:38 -0700

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