Re: [flexcoders] Equivalent to Java's Class.isInstance(Object) instance method?
Oops, sorry. Thanks, you're right! FlexBuilder code completion wasn't giving me the chance to put a variable after is - so I just assumed it wasn't possible (like in Java). andrii_olefirenko wrote: obj is cls - it works for me, no compile error (Flex SDK 3). -- View this message in context: http://www.nabble.com/Equivalent-to-Java%27s-Class.isInstance%28Object%29-instance-method--tp20171501p20182274.html Sent from the FlexCoders mailing list archive at Nabble.com.
Re: [flexcoders] Equivalent to Java's Class.isInstance(Object) instance method?
Yeah, builder's not so smart when you're trying to do anything out of the ordinary :) On Mon, Oct 27, 2008 at 4:01 PM, Mark Carter [EMAIL PROTECTED] wrote: Oops, sorry. Thanks, you're right! FlexBuilder code completion wasn't giving me the chance to put a variable after is - so I just assumed it wasn't possible (like in Java). andrii_olefirenko wrote: obj is cls - it works for me, no compile error (Flex SDK 3). -- View this message in context: http://www.nabble.com/Equivalent-to-Java%27s-Class.isInstance%28Object%29-instance-method--tp20171501p20182274.html Sent from the FlexCoders mailing list archive at Nabble.com. -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links -- Therefore, send not to know For whom the bell tolls. It tolls for thee. Like the cut of my jib? Check out my Flex blog! :: Josh 'G-Funk' McDonald :: 0437 221 380 :: [EMAIL PROTECTED] :: http://flex.joshmcdonald.info/
Re: Re: [flexcoders] Equivalent to Java's Class.isInstance(Object) instance method?
Hi Mike - sorry, you've lost me there...
The few tests I've done show that obj is cls is what I need. Are you
saying that does not work?
Michael Schmalle wrote:
Adding to the insight, if you wanted to use the 'is' operator with those
two
arguments, you need to create an instance of the Class and then use the
'is'
operator.
This would let you know if it is an instance of the object passed.
public static function
isObjectInstanceOfClass(obj:Object, cls:Class):Boolean
{
return obj is new cls();
}
We have asked the player engineers about the performance hit on this is
not
as bad as describeType in some instances.
Mike
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Re: [flexcoders] Equivalent to Java's Class.isInstance(Object) instance method?
The question has been answered (yes, it is possible to use is as part of
isInstanceOf() method. Here's an example of my use of
this mechanism (for determining if geometric shapes share an instance of a
particular class of constraint, e.g. are these two line
segments perpendicular to each other?)
public function sharesConstraintWith(that:MPShape,
constraintClass:Class):MPConstraint
{
// Get those constraints that are shared between this
and that, if there are any.
for each (var c0:MPConstraint in this.constraints)
{
for each (var c1:MPConstraint in
that.constraints)
{
if (c0 == c1 c0 is constraintClass)
return c0;
}
}
return null;
}
It works for me.
-Eric
--- In flexcoders@yahoogroups.com, Mark Carter [EMAIL PROTECTED] wrote:
Hi Mike - sorry, you've lost me there...
The few tests I've done show that obj is cls is what I need. Are you
saying that does not work?
Michael Schmalle wrote:
Adding to the insight, if you wanted to use the 'is' operator with those
two
arguments, you need to create an instance of the Class and then use the
'is'
operator.
This would let you know if it is an instance of the object passed.
public static function
isObjectInstanceOfClass(obj:Object, cls:Class):Boolean
{
return obj is new cls();
}
We have asked the player engineers about the performance hit on this is
not
as bad as describeType in some instances.
Mike
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method--tp20171501p20190188.html
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Re: [flexcoders] Equivalent to Java's Class.isInstance(Object) instance method?
I messed up, what I said does not work, to early in the morning for me. :)
'is' tests an instance to a class reference. I was thinking in the opposite
direction when I gave that example.
Eric shows you.
Mike
On Mon, Oct 27, 2008 at 11:41 AM, Eric Cooper [EMAIL PROTECTED] wrote:
The question has been answered (yes, it is possible to use is as part
of isInstanceOf() method. Here's an example of my use of
this mechanism (for determining if geometric shapes share an instance of a
particular class of constraint, e.g. are these two line
segments perpendicular to each other?)
public function sharesConstraintWith(that:MPShape,
constraintClass:Class):MPConstraint
{
// Get those constraints that are shared between this and that, if there
are any.
for each (var c0:MPConstraint in this.constraints)
{
for each (var c1:MPConstraint in that.constraints)
{
if (c0 == c1 c0 is constraintClass)
return c0;
}
}
return null;
}
It works for me.
-Eric
--- In flexcoders@yahoogroups.com flexcoders%40yahoogroups.com, Mark
Carter [EMAIL PROTECTED] wrote:
Hi Mike - sorry, you've lost me there...
The few tests I've done show that obj is cls is what I need. Are you
saying that does not work?
Michael Schmalle wrote:
Adding to the insight, if you wanted to use the 'is' operator with
those
two
arguments, you need to create an instance of the Class and then use the
'is'
operator.
This would let you know if it is an instance of the object passed.
public static function
isObjectInstanceOfClass(obj:Object, cls:Class):Boolean
{
return obj is new cls();
}
We have asked the player engineers about the performance hit on this is
not
as bad as describeType in some instances.
Mike
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Teoti Graphix, LLC
http://www.teotigraphix.com
Teoti Graphix Blog
http://www.blog.teotigraphix.com
You can find more by solving the problem then by 'asking the question'.
[flexcoders] Equivalent to Java's Class.isInstance(Object) instance method?
I've got an array of objects which I want to filter according to the object's class. The class itself is referenced by a variable so I cannot use the is operator. I'd like to be able to do something like: filterClass.isInstance(obj) Do I need to use isPrototypeOf()? - I don't really understand what that means. -- View this message in context: http://www.nabble.com/Equivalent-to-Java%27s-Class.isInstance%28Object%29-instance-method--tp20171501p20171501.html Sent from the FlexCoders mailing list archive at Nabble.com.
Re: [flexcoders] Equivalent to Java's Class.isInstance(Object) instance method?
I don't think that works when I have a variable of Class type.
public static function isObjectInstanceOfClass(obj:Object,
cls:Class):Boolean {
return obj is cls; // compile error
}
florian.salihovic wrote:
You are searching for the is-operator:
var displayObject:DisplayObject = new Sprite();
trace(displayObject is DisplayObject);
trace(displayObject is Sprite);
trace(displayObject is UIComponent);
Best regards
--- In flexcoders@yahoogroups.com, Mark Carter [EMAIL PROTECTED] wrote:
I've got an array of objects which I want to filter according to the
object's
class. The class itself is referenced by a variable so I cannot use the
is
operator.
I'd like to be able to do something like:
filterClass.isInstance(obj)
Do I need to use isPrototypeOf()? - I don't really understand what that
means.
--
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http://www.nabble.com/Equivalent-to-Java%27s-
Class.isInstance%28Object%29-instance-method--tp20171501p20171501.html
Sent from the FlexCoders mailing list archive at Nabble.com.
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