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| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
| Newsgroups | comp.lang.javascript |
| Subject | Re: when have we to use obj.hasOwnProperty(key) ? |
| Date | Tue, 21 Oct 2014 19:27:58 +0200 |
| Organization | PointedEars Software (PES) |
| Lines | 39 |
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| Reply-To | Thomas 'PointedEars' Lahn <cljs@PointedEars.de> |
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Une Bévue wrote:
> I'm using something like :
>
> var obj = {};
> obj.foo = 'bar';
>
> If I look at this object in the wrowser inspector I see :
>
> Object
> foo: 'bar'
> __PROTO__ : Object
>
> the later with a lot of methods.
_latter_
> For the time being I never have a prob with unwanted properties, but I
> wonder if...
>
> Because this object is send to a websocket server by Json and then
> included in MongoDB database.
>
> Then does I have to filter out this object or not ?
It is unclear what you are asking. However, if you want a reference to an
object that does not inherit any properties, use
var obj = Object.create(null);
If this method is implemented as specified, you do not have to use
obj.hasOwnProperty() when iterating over the object's properties with a for-
in statement.
--
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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when have we to use obj.hasOwnProperty(key) ? Une Bévue <unbewusst.sein@fai.invalid> - 2014-10-21 12:06 +0200
Re: when have we to use obj.hasOwnProperty(key) ? Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2014-10-21 13:21 -0200
Re: when have we to use obj.hasOwnProperty(key) ? Une Bévue <unbewusst.sein@fai.invalid> - 2014-10-21 17:26 +0200
Re: when have we to use obj.hasOwnProperty(key) ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-10-21 19:27 +0200
Re: when have we to use obj.hasOwnProperty(key) ? Une Bévue <unbewusst.sein@fai.invalid> - 2014-10-22 10:22 +0200
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