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Groups > comp.lang.javascript > #26936
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: What's wrong with this code? |
| Date | 2015-02-26 12:17 +0100 |
| Organization | PointedEars Software (PES) |
| Message-ID | <1462385.MiWHP334DG@PointedEars.de> (permalink) |
| References | <b2751271-cbda-4bcd-9217-a37eb3fa58b0@googlegroups.com> <typeof-20150226120428@ram.dialup.fu-berlin.de> |
Stefan Ram wrote:
> denissavenok@gmail.com writes:
>> var isUndefinedOrNull = function(obj) {
>> return /^(?:undefined|null)$/.test(typeof obj);
>> };
>
> // This stands since the beginning of JavaScript
> typeof null === 'object';
Except that in the first JavaScript/JScript versions there was no “===”
operator :) But using “==” instead does not change the semantics of this
expression as the operands have the same type (String).
--
PointedEars
FAQ: <http://PointedEars.de/faq> | SVN: <http://PointedEars.de/wsvn/>
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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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