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Re: What is this inside a function?

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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>.

-- 
Christoph M. Becker

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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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