Re: why the ! operator can be used to determine a string is null?

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From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: why the ! operator can be used to determine a string is null?
Date	Thu, 10 Aug 2017 04:33:17 +0200
Organization	PointedEars Software (PES)
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Ben Bacarisse wrote:

> Thomas 'PointedEars' Lahn <PointedEars@web.de> writes:
>> Ben Bacarisse wrote:
>>> Thomas 'PointedEars' Lahn <PointedEars@web.de> writes:
>>>> Ben Bacarisse wrote:
>>> <snip>
>>>>> Further complicated by the fact that there is a character called null
>>>>> (sometimes Null, Nul or NULL) so a string can "be null" in that it
>>>>> contains just that character.
>>>> As we are talking about ECMAScript, it is the Unicode character U+0000
>>>> NULL (to my surprise, not “NUL” as in US-ASCII) whose standard
>>>> representation is a boxed “NUL” (AFAIK, it is *never* called “null”,
>>>> “Null” or “Nul”):
>>> If you can find an original copy of the standard you'll see a table of
>>> control characters that gives "Abbreviations" (though most are acronyms)
>>> and, as you say, NUL is the abbreviation for the first one.  After that
>>> table is an explanation that gives the name as "Null" and the
>>> abbreviation as "Nul" (for some reason not in caps).
>> *I have just cited* “an original copy of the standard”, so please cite
>> evidence supporting your claims.
> 
> X3.4-1967 "The American Standard for Information Interchange". 

We are not talking about *that* standard as that has nothing to do with 
ECMAScript; we are talking about the *Unicode* character, therefore the 
corresponding *Unicode* Standard.

-- 
PointedEars
FAQ: <http://PointedEars.de/faq> | <http://PointedEars.de/es-matrix>
<https://github.com/PointedEars> | <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.

Thread

why the ! operator can be used to determine a string is null? Xue Feng <xf.lotus@yahoo.com> - 2017-08-08 23:43 +0800
  Re: why the ! operator can be used to determine a string is null? Robert Heller <heller@deepsoft.com> - 2017-08-08 11:16 -0500
  Re: why the ! operator can be used to determine a string is null? Jon Ribbens <jon+usenet@unequivocal.eu> - 2017-08-08 17:40 +0000
    Re: why the ! operator can be used to determine a string is null? Julio Di Egidio <julio@diegidio.name> - 2017-08-08 21:38 -0700
      Re: why the ! operator can be used to determine a string is null? John G Harris <niam@jghnorth.org.uk.invalid> - 2017-08-09 14:51 +0100
    Re: why the ! operator can be used to determine a string is null? Jon Ribbens <jon+usenet@unequivocal.eu> - 2017-08-09 11:01 +0000
      Re: why the ! operator can be used to determine a string is null? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-08-09 16:17 +0200
        Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-09 16:14 +0100
          Re: why the ! operator can be used to determine a string is null? Julio Di Egidio <julio@diegidio.name> - 2017-08-09 10:25 -0700
            Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-09 21:04 +0100
              Re: why the ! operator can be used to determine a string is null? Julio Di Egidio <julio@diegidio.name> - 2017-08-09 13:11 -0700
                Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-10 00:59 +0100
                [ANN] Spam filter for Google Groups (was: why the ! operator can be used to determine a string is null?) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-10 05:06 +0200
                Re: [ANN] Spam filter for Google Groups (was: why the ! operator can be used to determine a string is null?) Julio Di Egidio <julio@diegidio.name> - 2017-08-10 01:00 -0700
                Re: [ANN] Spam filter for Google Groups (was: why the ! operator can be used to determine a string is null?) John G Harris <niam@jghnorth.org.uk.invalid> - 2017-08-10 09:40 +0100
                Re: why the ! operator can be used to determine a string is null? Julio Di Egidio <julio@diegidio.name> - 2017-08-10 00:56 -0700
          Re: why the ! operator can be used to determine a string is null? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-08-09 22:01 +0200
            Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-09 23:35 +0100
              Re: why the ! operator can be used to determine a string is null? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-08-10 10:05 +0200
                Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-10 15:08 +0100
                Re: why the ! operator can be used to determine a string is null? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-08-10 16:42 +0200
          Re: why the ! operator can be used to determine a string is null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-09 23:56 +0200
            Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-10 01:40 +0100
              Re: why the ! operator can be used to determine a string is null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-10 03:44 +0200
                Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-10 03:20 +0100
                Re: why the ! operator can be used to determine a string is null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-10 04:33 +0200
                Re: why the ! operator can be used to determine a string is null? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-08-10 03:57 +0100
  Re: why the ! operator can be used to determine a string is null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-08 23:20 +0200
    Re: why the ! operator can be used to determine a string is null? Julio Di Egidio <julio@diegidio.name> - 2017-08-08 21:20 -0700
      Re: why the ! operator can be used to determine a string is null? Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2017-08-09 09:26 +0200
        Re: why the ! operator can be used to determine a string is null? Julio Di Egidio <julio@diegidio.name> - 2017-08-09 01:31 -0700
        Re: why the ! operator can be used to determine a string is null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-09 11:32 +0200
          Re: why the ! operator can be used to determine a string is null? Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2017-08-10 09:10 +0200
            Re: why the ! operator can be used to determine a string is null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-10 14:51 +0200
              Re: why the ! operator can be used to determine a string is null? Tim Streater <timstreater@greenbee.net> - 2017-08-10 15:11 +0100
              Re: why the ! operator can be used to determine a string is null? Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2017-08-10 18:52 +0200

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