Re: [Dynapi-Dev] Continuing Freeing memory

[Richard E. <emb...@co...>]

ECMAScript Language Specification
http://www.ecma.ch/ecma1/stand/ecma-262.htm

ECMAScript Components Specification
http://www.ecma.ch/ecma1/stand/ecma-290.htm


From the spec for javascript (Ecma-262):

8.6.2.5 [[Delete]] (P)
When the [[Delete]] method of O is called with property name P, the following
steps are taken: 1. If O doesn t have a property with name P, return true.
2. If the property has the DontDelete attribute, return false.
3. Remove the property with name P from O.
4. Return true.


11.4.1 The delete Operator
The production UnaryExpression : delete UnaryExpression is evaluated as
follows:
1. Evaluate UnaryExpression.
2. If Type(Result(1)) is not Reference, return true.
3. Call GetBase(Result(1)).
4. Call GetPropertyName(Result(1)).
5. Call the [[Delete]] method on Result(3), providing Result(4) as the property
name to delete.
6. Return Result(5).

Implimentations of course can vary.

When I wrote my javascript interpreter/compiler 4 years ago I helped (in a very
small way)
in debugging the spec.

Richard Emberson


Pascal wrote:

> so:
>
> myLayer = new DynLayer
>
> delete myLayer
>
> destroys it completely? (or do we have to delete every object created within
> the dynlayer object ?)
>
> Pascal Bestebroer (pb...@oi...)
> Software ontwikkelaar
> Oberon Informatiesystemen b.v.
> http://www.oibv.com
>
> > -----Oorspronkelijk bericht-----
> > Van: dyn...@li...
> > [mailto:dyn...@li...]Namens Eytan
> > Heidingsfeld
> > Verzonden: woensdag 21 februari 2001 14:20
> > Aan: Dynapi-Dev
> > Onderwerp: [Dynapi-Dev] Continuing Freeing memory
> >
> >
> > Amazing news flash:
> > Thanx to Bradford Maness and the delete command in JS I found
> > that if you
> > delete objects(repeating objects not elements) in IE memory is freed.
> >
> > 8an
> >
> >
> > _______________________________________________
> > Dynapi-Dev mailing list
> > Dyn...@li...
> > http://lists.sourceforge.net/lists/listinfo/dynapi-dev
> >
>
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