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Groups > comp.lang.java.programmer > #28167

Re: 64-bit hashing function

Newsgroups comp.lang.java.programmer
Date 2014-04-21 12:01 -0700
References <kfh8l9p1hhphqv5l62am7if9bhnotfse6j@4ax.com> <5354c699$0$6708$9b4e6d93@newsspool2.arcor-online.net> <45i9l9tq8ng6dk1lbfoc97tcj5gbd09iu7@4ax.com> <ein9l99btiltc48sq75lqum8rgblqr4t76@4ax.com> <63dbeb21-8000-4bbd-b2fb-5b70b369b4a1@googlegroups.com>
Message-ID <c86bb47c-30f8-40cd-837f-da4460e945f4@googlegroups.com> (permalink)
Subject Re: 64-bit hashing function
From taqmcg@gmail.com

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On Monday, April 21, 2014 2:49:20 PM UTC-4, taq...@gmail.com wrote:
...
> ...  a 64 bit hash is ~2^(-17) <<< 1.
Actually it's 20,000^2/2^65 which is more like 2^30/2^65 = 2^-35 ~ 3x10^-11 give or take a power of two or so.  Switched ints and shorts for a second writing the above.

   Tom

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Thread

64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-20 15:15 -0700
  Re: 64-bit hashing function Arne Vajhøj <arne@vajhoej.dk> - 2014-04-20 19:37 -0400
  Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-20 22:18 -0700
  Re: 64-bit hashing function Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-04-21 09:19 +0200
    Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 00:51 -0700
      Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 02:05 -0700
        Re: 64-bit hashing function taqmcg@gmail.com - 2014-04-21 11:49 -0700
          Re: 64-bit hashing function taqmcg@gmail.com - 2014-04-21 12:01 -0700
        Re: 64-bit hashing function wolfgang zeidler <invalid@invalid.invalid> - 2014-04-22 20:42 +0200
      Re: 64-bit hashing function Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-04-21 12:51 +0200
        Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 06:31 -0700
          Re: 64-bit hashing function Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-04-21 16:40 +0200
            Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 20:45 -0700
              Re: 64-bit hashing function Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-04-22 09:46 +0200
        Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 06:38 -0700
          Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 06:55 -0700
        Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 10:09 -0700
          Re: 64-bit hashing function markspace <markspace@nospam.nospam> - 2014-04-21 11:46 -0700
            Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 20:55 -0700
              Re: 64-bit hashing function markspace <markspace@nospam.nospam> - 2014-04-22 08:39 -0700
            Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 20:56 -0700
            Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 21:05 -0700
              Re: 64-bit hashing function markspace <markspace@nospam.nospam> - 2014-04-22 08:15 -0700
            Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-25 02:29 -0700
          Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-21 20:53 -0700
          Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-05-08 10:12 -0700
            Re: 64-bit hashing function Simon Lewis <simonlewis2001@gmail.com> - 2014-05-08 21:27 +0200
  Re: 64-bit hashing function rossum <rossum48@coldmail.com> - 2014-04-23 09:57 +0100
    Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-04-25 04:08 -0700
      Re: 64-bit hashing function Mike Amling <mamling@chaff.us> - 2014-05-05 11:03 -0500
        Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-05-29 16:00 -0700
        Re: 64-bit hashing function Roedy Green <see_website@mindprod.com.invalid> - 2014-05-29 16:16 -0700

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