Re: closure bindings

Message-ID	<1642787.IUjFaCZJrE@PointedEars.de> (permalink)
From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Organization	PointedEars Software (PES)
Date	2011-10-13 21:36 +0200
Subject	Re: closure bindings
Newsgroups	comp.lang.javascript
References	(4 earlier) <2994749.SPkdTlGXAF@PointedEars.de> <1d5abff7-3bdd-4046-8c57-0d398f76049e@l11g2000prh.googlegroups.com> <8914731.SEqChMirdb@PointedEars.de> <09dd3324-8ad3-4af6-99f7-128c29c66711@j19g2000vbn.googlegroups.com> <1582342.FiOE1xPOLP@PointedEars.de>
Followup-To	comp.lang.javascript

Followups directed to: comp.lang.javascript

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Thomas 'PointedEars' Lahn wrote:

> Michael Haufe (TNO) wrote:
>> Thomas 'PointedEars' Lahn wrote:
>>> Michael Haufe (TNO) wrote:
>>> > Thomas 'PointedEars' Lahn wrote:
>>> >> BTW, how do you pass a *scope* to a method?
>>> > - pass "this" from the global scope to get a reference to it
>>>
>>> `this' has nothing to do with scope.
>> 
>> PowerShell has scope as an object to manipulate:
>>     $global:foo = "bar";
>>     $local:foo="bar";
>>     $7:foo="bar";
>> 
>> […]
>> So for the above, the emulated effect can be seen for this specific
>> case:
>> 
>> var foo = "bar"
>> 
>> function test(s){
>>     WScript.Echo(s.foo)
>> }
>> 
>> test(this) //bar
>>
>> function change(s){
>>     s.foo = "quux"
>> }
>> 
>> change(this)
>> 
>> test(this) //quux
> 
> And AISB, and we discussed at length before, `this' has nothing to do with
> scope.  You can see that confirmed, not refuted, here.  It is only that
> the ECMAScript Global Object serves as the Variable Object for the global
> execution context (to avoid the even more complicated ES5 terminology)
> that it *appears* *as* if* the opposite was the case.
> 
> Wrap this in `(function() { … })()' and it will cease working (if it
> worked before), i. e. both test() calls will show `undefined', and in
> change() the global object will be added a `foo' property, if that.

Err, the first test() call will show `undefined' (unless the global object 
already had a property of that name and a value different from `undefined'), 
the second one will show `quux' if creation or modification of the property 
of the global object was successful.
 

PointedEars
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Google Dart Released Today dhtml <dhtmlkitchen@gmail.com> - 2011-10-10 10:44 -0700
  Re: Google Dart Released Today "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2011-10-10 14:24 -0700
    Re: Google Dart Released Today dhtml <dhtmlkitchen@gmail.com> - 2011-10-10 22:36 -0700
      Re: Google Dart Released Today David Mark <dmark.cinsoft@gmail.com> - 2011-10-10 23:41 -0700
      Re: Google Dart Released Today "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2011-10-11 05:33 -0700
        Re: Google Dart Released Today dhtml <dhtmlkitchen@gmail.com> - 2011-10-11 14:06 -0700
          Re: Google Dart Released Today Swifty <steve.j.swift@gmail.com> - 2011-10-12 07:13 +0100
      closure bindings (was: Google Dart Released Today) Andreas Bergmaier <andber93@web.de> - 2011-10-11 23:56 +0200
        Re: closure bindings (was: Google Dart Released Today) David Mark <dmark.cinsoft@gmail.com> - 2011-10-11 16:20 -0700
        Re: closure bindings Bwig Zomberi <zomberiMAPSONNOSPAM@gmail.invalid> - 2011-10-12 15:02 +0530
          Re: closure bindings Antony Scriven <adscriven@gmail.com> - 2011-10-12 05:12 -0700
            Re: closure bindings dhtml <dhtmlkitchen@gmail.com> - 2011-10-12 18:27 -0700
        Re: closure bindings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-10-12 13:24 +0200
          Re: closure bindings "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2011-10-12 08:56 -0700
            Re: closure bindings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-10-12 21:15 +0200
              Re: closure bindings "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2011-10-12 15:21 -0700
                Re: closure bindings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-10-13 20:56 +0200
                Re: closure bindings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-10-13 21:36 +0200
                Re: closure bindings "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2011-10-13 16:41 -0700
                Re: closure bindings dhtml <dhtmlkitchen@gmail.com> - 2011-10-13 22:39 -0700
                Re: closure bindings "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2011-10-14 09:03 -0700
                Re: closure bindings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-10-14 20:05 +0200
              Re: closure bindings dhtml <dhtmlkitchen@gmail.com> - 2011-10-12 18:38 -0700
                Re: closure bindings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-10-14 23:34 +0200
                Re: closure bindings dhtml <dhtmlkitchen@gmail.com> - 2011-10-14 16:56 -0700
                Re: closure bindings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-10-15 02:44 +0200
                Re: closure bindings dhtml <dhtmlkitchen@gmail.com> - 2011-10-14 21:18 -0700
            Re: closure bindings David Mark <dmark.cinsoft@gmail.com> - 2011-10-12 18:28 -0700
      Re: Google Dart Released Today Antony Scriven <adscriven@gmail.com> - 2011-10-11 15:13 -0700
        Re: Google Dart Released Today dhtml <dhtmlkitchen@gmail.com> - 2011-10-11 22:33 -0700
      Re: Google Dart Released Today Scott Sauyet <scott.sauyet@gmail.com> - 2011-10-12 07:27 -0700
        Re: Google Dart Released Today dhtml <dhtmlkitchen@gmail.com> - 2011-10-12 18:29 -0700
        Re: Google Dart Released Today Duncan Booth <duncan.booth@invalid.invalid> - 2011-10-13 08:21 +0000
          Re: Google Dart Released Today Scott Sauyet <scott.sauyet@gmail.com> - 2011-10-13 04:46 -0700
            Re: Google Dart Released Today unbewusst.sein@fai.invalid (Une Bévue) - 2011-10-13 14:03 +0200
              Re: Google Dart Released Today Duncan Booth <duncan.booth@invalid.invalid> - 2011-10-13 12:40 +0000
                Re: Google Dart Released Today unbewusst.sein@fai.invalid (Une Bévue) - 2011-10-13 17:51 +0200
            Re: Google Dart Released Today Duncan Booth <duncan.booth@invalid.invalid> - 2011-10-13 13:31 +0000
              Re: Google Dart Released Today Duncan Booth <duncan.booth@invalid.invalid> - 2011-10-13 15:17 +0000
            Re: Google Dart Released Today Karl Tikjøb Krukow <karl.krukow@gmail.com> - 2011-10-14 13:02 +0200
              Re: Google Dart Released Today dhtml <dhtmlkitchen@gmail.com> - 2011-10-14 12:36 -0700
                Re: Google Dart Released Today Karl Tikjøb Krukow <karl.krukow@gmail.com> - 2011-10-15 19:30 +0200
  Re: Google Dart Released Today David Mark <dmark.cinsoft@gmail.com> - 2011-10-10 22:23 -0700
  Re: Google Dart Released Today Matt McDonald <matt@fortybelow.ca> - 2011-10-12 19:48 -0600
    Re: Google Dart Released Today dhtml <dhtmlkitchen@gmail.com> - 2011-10-12 21:04 -0700

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