Re: Puzzling JS Error

From	Joao Rodrigues <groups_jr-1@yahoo.com.br>
Newsgroups	comp.lang.javascript
Subject	Re: Puzzling JS Error
Date	2015-04-11 22:07 -0300
Organization	Aioe.org NNTP Server
Message-ID	<mgcgfm$bun$1@speranza.aioe.org> (permalink)
References	(3 earlier) <mgc2hl$e88$1@speranza.aioe.org> <2172415.g2VhMMEByA@PointedEars.de> <mgc75b$or6$1@speranza.aioe.org> <6827636.tojzTVapKU@PointedEars.de> <9301741.hI6YXm1qAv@PointedEars.de>

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On 11/04/2015 20:07, Thomas 'PointedEars' Lahn wrote:
> Thomas 'PointedEars' Lahn wrote:
>
>> You are talking about the wrong recommendation of
>>
>>    if (jsx.net === undefined)
>>
>> of JS*L*int.  It is wrong because the “undefined” property of the global
>> object has been writable before,
>
> … – and because
>
>    typeof x != "undefined"
>
> is _not_ functional equivalent to
>
>    x !== undefined
>
> even if the value of the “undefined” property is the default of type
> Undefined.  Because the latter throws a ReferenceError exception if “x”
> cannot be resolved, the former does not – …
>
>> but Douglas Crockford is either unaware of that or chooses to ignore it,
>> like so many other issues.  Avoid JSLint.
>

100% agreed.
Thanks for commenting on the JSLint issue.

-- 
Joao Rodrigues

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Puzzling JS Error "Mel Smith" <syntel@cox.net> - 2015-04-09 11:49 -0600
  Re: Puzzling JS Error "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-04-09 22:21 +0200
    Re: Puzzling JS Error "Mel Smith" <syntel@cox.net> - 2015-04-09 16:26 -0600
      Re: Puzzling JS Error "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-04-10 10:32 +0200
      Re: Puzzling JS Error Denis McMahon <denismfmcmahon@gmail.com> - 2015-04-10 14:51 +0000
        Re: Puzzling JS Error "Mel Smith" <syntel@cox.net> - 2015-04-10 09:48 -0600
          Re: Puzzling JS Error "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-04-10 18:01 +0200
  Re: Puzzling JS Error Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-10 00:20 +0200
  Re: Puzzling JS Error JJ <jj4public@vfemail.net> - 2015-04-10 11:15 +0700
    Re: Puzzling JS Error Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-11 16:15 +0200
      Re: Puzzling JS Error Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-04-11 18:09 -0300
        Re: Puzzling JS Error Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-11 23:42 +0200
          Re: Puzzling JS Error Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-04-11 19:27 -0300
            Re: Puzzling JS Error Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-12 01:01 +0200
              Re: Puzzling JS Error Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-04-12 01:07 +0200
                Re: Puzzling JS Error Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-04-11 22:07 -0300

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