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| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
| Newsgroups | comp.lang.javascript |
| Subject | Re: What's wrong with this code? |
| Date | Thu, 26 Feb 2015 17:09:07 +0100 |
| Organization | PointedEars Software (PES) |
| Lines | 26 |
| Message-ID | <2865092.U4gHO1vGHG@PointedEars.de> (permalink) |
| References | <b2751271-cbda-4bcd-9217-a37eb3fa58b0@googlegroups.com> <8761aopx65.fsf@bsb.me.uk> <2083952.afr504CXY5@PointedEars.de> <87mw40n0or.fsf@bsb.me.uk> |
| Reply-To | Thomas 'PointedEars' Lahn <cljs@PointedEars.de> |
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Ben Bacarisse wrote: > Thomas 'PointedEars' Lahn <PointedEars@web.de> writes: >> Ben Bacarisse wrote: >>> You might (in some very odd implementation) get 'null' from typeof, but >>> that's only because the result is up to the implementation in some very >>> specific cases. >> To be exact, a conforming implementation of ECMAScript could only provide >> "null" as the result of a “typeof” operation if the operand was a >> reference to a host object. > > To be more exact, only if the reference is to a host object that does > not implement [[Call]]. For references to callable object, both native > and host, the result must be 'function'. True. So much for theory. In practice, the result is "object" for callable host objects in the MSHTML DOM until MSHTML 8.0.x inclusive. <http://PointedEars.de/wsvn/JSX/trunk/types.js?rev=15> <http://PointedEars.de/wsvn/JSX/trunk/object.js> -- PointedEars FAQ: <http://PointedEars.de/faq> | SVN: <http://PointedEars.de/wsvn/> Twitter: @PointedEars2 | ES Matrix: <http://PointedEars.de/es-matrix> Please do not cc me. / Bitte keine Kopien per E-Mail.
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What's wrong with this code? denissavenok@gmail.com - 2015-02-26 01:18 -0800
Re: What's wrong with this code? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-26 12:17 +0100
Re: What's wrong with this code? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-26 14:25 +0000
Re: What's wrong with this code? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-26 16:04 +0100
Re: What's wrong with this code? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-26 15:37 +0000
Re: What's wrong with this code? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-26 17:09 +0100
Re: What's wrong with this code? Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-02-26 14:09 -0300
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