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Groups > comp.lang.javascript > #31948
| From | Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: Why JavaScript has two zeros |
| Date | 2016-12-22 23:43 +0000 |
| Organization | Home |
| Message-ID | <LMKbWltZUGXYFwDf@invalid.uk.co.demon.merlyn.invalid> (permalink) |
| References | <84234e86-ac01-4a9e-9d21-dc1cdc30678c@googlegroups.com> <1bm6A.536745$IJ6.194196@fx46.am4> |
In comp.lang.javascript message <1bm6A.536745$IJ6.194196@fx46.am4>, Wed, 21 Dec 2016 02:55:57, cyber@2trom.com posted: >abdulapopoola@gmail.com wrote: >> Do you know that there are actually two zero value types in >>JavaScript (as well as most languages)? Read to know why this matters, >>what scenarios to watch out for and some of the quirks of the IEEE 754 >>standard. >> >> https://abdulapopoola.com/2016/12/19/why-javascript-has-two-zeros-0-and-0/ > >I imagine that also having -0i and 0i might be too complex for JavaScript. JavaScript has two zeroes (of equal but distinguishable values) because IEEE 754 is a sign-magnitude-exponent representation. They are the reciprocals of the two infinities. long-established readers with good memories should recall at least one occasion on which having two zeroes was arithmetically useful. In JavaScript one can set PlusI = [0,+1] and MinusI = [0,-1], and write arithmetic functions to operate on and return values of that nature. It is known that Math.POW(PlusI, PlusI) should return 0.207879576350761908546955... - and other values. -- (c) John Stockton, Surrey, UK. ¬@merlyn.demon.co.uk Turnpike v6.05 MIME. Merlyn Web Site < > - FAQish topics, acronyms, & links.
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Why JavaScript has two zeros abdulapopoola@gmail.com - 2016-12-19 21:09 -0800
Re: Why JavaScript has two zeros "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-12-20 11:46 +0100
Re: Why JavaScript has two zeros John Harris <niam@jghnorth.org.uk.invalid> - 2016-12-20 17:58 +0000
Re: Why JavaScript has two zeros "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-12-20 23:56 +0100
Re: Why JavaScript has two zeros John Harris <niam@jghnorth.org.uk.invalid> - 2016-12-21 13:59 +0000
Re: Why JavaScript has two zeros <cyber@2trom.com> - 2016-12-21 02:55 +0000
Re: Why JavaScript has two zeros Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-12-22 23:43 +0000
Re: Why JavaScript has two zeros "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-12-23 09:04 +0100
Re: Why JavaScript has two zeros Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-12-25 22:15 +0000
Re: Why JavaScript has two zeros Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-12-25 23:39 +0000
Re: Why JavaScript has two zeros Tim Streater <timstreater@greenbee.net> - 2016-12-23 09:05 +0000
Re: Why JavaScript has two zeros Ram Tobolski <ramtob@gmail.com> - 2016-12-24 02:28 -0800
Re: Why JavaScript has two zeros Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-12-25 22:00 +0000
Re: Why JavaScript has two zeros "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-12-26 12:08 -0800
Why JavaScript has two zeros Ram Tobolski <ramtob@gmail.com> - 2016-12-21 10:20 -0800
Re: Why JavaScript has two zeros "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-12-26 12:03 -0800
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