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Re: Arithmetic Accuracy Question

Newsgroups comp.lang.javascript
Date 2020-02-27 06:02 -0800
References <2e6b89f4-5561-43ab-8bc0-7d5c24f96db5@googlegroups.com>
Message-ID <cff02c43-bb87-468a-a3bd-a27f71129dbc@googlegroups.com> (permalink)
Subject Re: Arithmetic Accuracy Question
From Julio Di Egidio <julio@diegidio.name>

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On Thursday, 27 February 2020 13:08:45 UTC+1, dr.j.r...@gmail.com  wrote:

> Am I entitled to say that, script using IEEE Doubles, all the variables
> will take the infinite-accuracy values?

Of course not, double is not arbitrary ("infinite") precision.

> And, does currently predominantly-used JavaScript natively have
> greater-precision types of numbers, such as 64-bit unsigned
> integers?

As far as I know, it's all double precision floating point in JS.  But I
haven't checked with the spec: others may be able to be more definitive on
this  (whether the runtime is allowed to leverage integers up to a certain
point, in which case it would certainly use int64 on 64 bit machines).

> If so, recommended URL(s)?

Look up javascript arbitrary precision / arbitrary integers and rationals.
I know there are few libraries around, some even well established, that
offer you that functionality.   Performances are generally poor though,
as it is all coded in JS itself.  Another approach and interesting search
to do would be solutions that leverage web assembler or similar.  Look it
up and let us know...  ;)

Julio

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Thread

Arithmetic Accuracy Question dr.j.r.stockton@gmail.com - 2020-02-27 04:08 -0800
  Re: Arithmetic Accuracy Question Julio Di Egidio <julio@diegidio.name> - 2020-02-27 06:02 -0800
  Re: Arithmetic Accuracy Question "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-02-27 06:29 -0800
    Re: Arithmetic Accuracy Question Julio Di Egidio <julio@diegidio.name> - 2020-02-27 06:39 -0800
      Re: Arithmetic Accuracy Question "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-02-27 07:49 -0800
        Re: Arithmetic Accuracy Question Julio Di Egidio <julio@diegidio.name> - 2020-02-27 08:00 -0800
          Re: Arithmetic Accuracy Question "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-02-27 08:20 -0800
      Re: Arithmetic Accuracy Question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-02-27 22:54 +0100
        Re: Arithmetic Accuracy Question Arno Welzel <usenet@arnowelzel.de> - 2020-02-28 09:24 +0100
          Re: Arithmetic Accuracy Question "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-02-28 06:48 -0800
        Re: Arithmetic Accuracy Question John G Harris <niam@jghnorth.org.uk.invalid> - 2020-02-28 08:32 +0000
      Re: Arithmetic Accuracy Question Arno Welzel <usenet@arnowelzel.de> - 2020-02-28 09:20 +0100
        Re: Arithmetic Accuracy Question "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2020-02-28 11:06 +0100
    Re: Arithmetic Accuracy Question dr.j.r.stockton@gmail.com - 2020-03-26 12:04 -0700
      Re: Arithmetic Accuracy Question "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-03-26 13:17 -0700
  Re: Arithmetic Accuracy Question dr.j.r.stockton@gmail.com - 2020-03-26 11:24 -0700

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