Davis Ford wrote:
>
>
> Hi Paul,
>
> I don't believe this is correct for ActionScript3. Strict equality is
> the "===" operator which compares object instances. "==" should test
> for equality.
I tried (in Flash)..
var objA:Object = {a:1};
var objB:Object = {a:1};
trace(objA==objB); // false
var xmlA:XML = <x>xxx</x>;
var xmlB:XML = <x>xxx</x>;
trace(xmlA==xmlB); // true
trace(xmlA===xmlB); // false
and indeed you are right. I didn't know that XML was treated differently
from vanilla object in comparisons.
Thanks.
Paul
>
> If you change the test to this...
>
> [Test]
> public function testXmlEquality():void {
> var xml1:XML =
> <a>
> <b></b>
> <c></c>
> </a>;
> var xml2:XML =
> <a>
> <b></b>
> <c></c>
> </a>;
> xml1.normalize();
> xml2.normalize();
> Assert.assertTrue(xml1 == xml2);
> }
>
> it passes. XML/e4x is supposed to support this out of the box, and it
> does -- to a degree. Although, semantically and syntactically, xml1
> and xml2 from the 1st test are equivalent, e4x is not thinking so, and
> I think that is broken. Searching for a workaround has popped up very
> little, which is why I was hoping someone on the list might have a
> good answer for why this is, and how I can test XML equivalence
> without caring about element ordering.
>
> Regards,
> Davis
>
> On Wed, Jan 6, 2010 at 7:03 PM, Paul Andrews <[email protected]
> <mailto:[email protected]>> wrote:
>
>
> Davis Ford wrote:
> >
> >
> > Why does this test fail? Is there any way to test for equality that
> > ignores the ordering of elements -- which shouldn't technically
> matter?
> >
> > [Test]
> > public function testXmlEquality():void {
> > var xml1:XML =
> > <a>
> > <b></b>
> > <c></c>
> > </a>;
> > var xml2:XML =
> > <a>
> > <c></c>
> > <b></b>
> > </a>;
> > Assert.assertTrue(xml1 == xml2);
> > }
> xml1 and xml2 are references to objects. Because they are different
> objects they are not equal - the references are different.
> >
> >
> >
> >
> >
>
>
>
>
> --
> Zeno Consulting, Inc.
> home: http://www.zenoconsulting.biz
> blog: http://zenoconsulting.wikidot.com
> p: 248.894.4922
> f: 313.884.2977
>
>
>
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