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Groups > comp.lang.javascript > #28091
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: What is this inside a function? |
| Date | 2015-06-12 19:19 +0200 |
| Organization | PointedEars Software (PES) |
| Message-ID | <1908572.Dhjy60Y1dk@PointedEars.de> (permalink) |
| References | <55745377$0$12997$c3e8da3$5496439d@news.astraweb.com> <878ubvjqgp.fsf@bsb.me.uk> <55749955.4050107@arcor.de> <1622672.QCbqgxkKEs@PointedEars.de> |
Thomas 'PointedEars' Lahn wrote:
> Christoph M. Becker wrote:
>> Cf. <http://ecma-international.org/ecma-262/5.1/#sec-13.2.2>.
>
> Correct, and this has practical implications:
>
> function Person2(name, age)
> {
> if (!(this instanceof Person2)) return new Person2(name, age);
>
> this.name = name;
> this.age = age;
> }
>
> and with JSX:
>
> function Person2(name, age)
> {
> if (!(this instanceof Person2)) return Person2.construct(arguments);
>
> this.name = name;
> this.age = age;
> }
>
> See also Function.prototype.construct() and
> Function.prototype.construct2() in
> <http://PointedEars.de/wsvn/JSX/trunk/object.js>.
Du not bother looking for .construct2(); it went the way of the dinosaur
with r510 last year already :) The new .construct() does not use eval()
anymore, and as it was also superior to the .construct2() that Asen Bozhilov
suggested, I have removed the latter method.
<http://pointedears.de/wsvn/JSX/trunk/object.js?op=diff&rev=510>
--
PointedEars
FAQ: <http://PointedEars.de/faq> | SVN: <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | ES Matrix: <http://PointedEars.de/es-matrix>
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What is this inside a function? Steven D'Aprano <steve@pearwood.info> - 2015-06-08 00:21 +1000
Re: What is this inside a function? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-06-07 19:58 +0100
Re: What is this inside a function? "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-07 21:19 +0200
Re: What is this inside a function? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-06-07 20:43 +0100
Re: What is this inside a function? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-06-08 01:08 +0200
Re: What is this inside a function? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-06-12 19:19 +0200
Re: What is this inside a function? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-06-07 23:48 +0200
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