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Re: What is this inside a function?

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From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.javascript
Subject Re: What is this inside a function?
Date Sun, 07 Jun 2015 20:43:15 +0100
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"Christoph M. Becker" <cmbecker69@arcor.de> writes:

> Ben Bacarisse wrote:
>
>> Steven D'Aprano <steve@pearwood.info> writes:
>> 
>>> Constructors are just functions, except they implicitly return "this",
>>> right?
>> 
>> Not really.  Constructors are just functions and they can return
>> whatever they like, and when called without new, they return that value.
>> It's the new expression that returns the new object, probably modified
>> by the function that was called.  The value the function returns is
>> ignored in a new expression.
>
> The latter is only true if a primitive value would be returned.  If,
> however, the return statement's expression evaluates to an object, this
> very object is returned. E.g.
>
>   function foo() {return {bar: "baz"}}
>   new foo // => {bar: "baz"}
>
> Cf. <http://ecma-international.org/ecma-262/5.1/#sec-13.2.2>.

Ah, yes, I forgot that.  Thanks.

-- 
Ben.

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Thread

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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