I need to know if Null is the same as Undefined and then, is it the same in AS2 as it is in AS3?According to the help files in CS3:
Null: A special value that can be assigned to variables or returned by a function if no data was provided
Undefined: A special value, usually used to indicate that a variable has not yet been assigned a value.
If I parse an XML element with a null or undefined result, is it possible to display a blank text field rather than "null" or "undefined" in the field? It seems really basic but I'm drawing a huge blank.XML
Code:
<content>
<item></item>
[code].....
In ActionScript 1 and 2, if you compare undefined, null or NaN with an arbitrary number using >= or <= operator, the result is always true. Test code:
var x, n, range = 1000;
for (var i = 0; i < 3; ++i) {
switch (i) {
case 0:
x = undefined;
[Code] .....
Furthermore, isNaN(null) return true. These are contrary to JavaScript and may not conform with ECMA standard.
I use this pattern to test for undefined and null values in ActionScript/Flex :
if(obj) {
execute()
}
Unfortunately, a ReferenceError is always thrown when I use the pattern to test for child objects :
if(obj.child) {
execute()
}
ReferenceError: Error #1069: Property child not found on obj and there is no default value.Why does testing for child objects with if statements throw a ReferenceError?
I'm wondering if its possible to resize flash with javascript. I can't change any code in the flash object alone all I have is html, javascript and php to work with. Heres what I've found so far:
[Code]....
Content Embed is the embed tag and content object is the object tag in the flash. This works in chrome (and probably firefox) but not ie. In internet explorer I get the error: Unable to set value of the property 'height': object is null or undefined Here is the example page I have been using:[URL]
Flex complains if I want to create an object from a library symbol with linkage: 1180: Call to a possibly undefined method [linkage name]. So to avoid this, I create a class for that symbol, in this case extending BitmapData using Flex's new ActionScript Class feature. Flex create that class for me and the constructor looks like this: public function CustomBitmapData(width:int, height:int, transparent:Boolean=true, fillColor:uint=null)
[Code]...
onEnterFrame=null, onEnterFrame=undefined & delete onEnterFrame....
Which one to use??? What are the performance considerations. If all my movieclips on-stage are running a MovieClip.prototype.onEnterFrame = function() {run initial stuff before setting onEnterFrame=null/undefined... }, will there be performance hits? It's sad that delete onEnterFrame doesn't work unless I delete the prototype enterFrame as well, which would make the clips reinitailise itself again once you declare the enterFrame prototype again (i need to do this since there's more movieclips that end up appearing on-stage, and they need to automatically initialises themselves the moment they appear).
[Code]...
I have begun on a list: My reference is null!Stage is null! Convert this code from as 2 to as 3 for me! Crossdomain policies are in the way of my cool idea Dynamic property names I need to use stuff on the parent! I don't want my children to scale when I scale the parent! Classes vs instances. Mod note: I do not want this topic pinned, we will use a fresh topic once we have agreed to the content.
View 9 RepliesI am creating Dynamic Destinations
MessageBroker broker = MessageBroker.getMessageBroker(null);
MessageService service = (MessageService) broker.getService("message-service");
MessageDestination destination = (MessageDestination) service.createDestination("Group1");
[code].....
But I am getting Null Pointer Exception
MessageBroker broker = MessageBroker.getMessageBroker(null);
the script i wrote is working fine. but the script attached to the flash player which i have no control over is throwing a script error (im using IE8).how can i fix this? if i run it locally there is no error.
'null' is null or not an object
try { document.getElementById("").SetReturnValue(__flash__toXML(function() { return document.location.hostname; }()) ); } catch (e) { document.getElementById("").SetReturnValue("<undefined/>"); }
but this is from flash script and i dont have control over it. it just say JScript - script block.
I have create a menu but when clicking on menu so that it shows, I get an error on the line because of the line "myMenu.show(null,null)". See function below:
private function createAndShowmyMenu():void {
myMenu = Menu.createMenu(null, myMenuDataProvider, false);
myMenu.labelField="@label"[code]........
sometimes I remove child and trace it afterwards and it outputs null although I havent yet set it to null, why is that? and do I need to set it to null also in that case?
Code:
trace(holderArr[loadedThumbs].getChildByName("photo_bg"));
//[object MovieClip]
holderArr[loadedThumbs].removeChild(holderArr[loadedThumbs].getChildByName("photo_bg"));
[Code]....
im having problems getting some as3 generated (not drawn on stage) movie clips moving across the screen.
Code:
package {
import flash.geom.ColorTransform;
import flash.display.MovieClip;
import fl.motion.Color;
import flash.display.*;
[code]....
I have the following piece of code(part of a much bigger program). I this code I am re-using a motion that has been previously used successfully. The trace stmts are used to identify the exact location of the error and the error conditions as best I can.[code]
View 4 RepliesWhen you cast null to an object using Object(null), the result is an object.When you cast undefined to an object using Object(undefined), the result is an object.But saying null as Object or undefined as Object remains null.Why is this? I can't find anything in the documentation about this.
The objects that result from these casts can have properties set on and read from them. It's as if the cast created information, or removed whatever special information the null and undefined values have. But there's no indication in the AS3 documentation that the null and undefined special types are actually objects.
I created a Sponsorbar which dynamically adds sponsors according a XML script.
ActionScript Code:
for each( var imgPath2:XML in xdata.img )
{[code]...........
i am using flash, .Net, and MySQL and have elements (text fields) posting in flash.Question is, if the table in the data base is not holding the var char how can I set the text field in flash to not show undefined and just be blank?
View 6 RepliesI am trying to add an EventListener to a MC, but I am getting the 1009 error. My script is referencing a MC that does exist. I have verified that my code is typed correctly, and that my instance names are correct.I am creating a portfolio site. On the first frame I have my main navigation (well, it's actually not the first frame. I alpha-fade everything in so it's really the 6th or 7th, but I'm not sure how pertinent that is). The main navigation works fine (5 movie clips, fyi). Clicking them will move to a different frame, and the information and sub navigation for the frame will fade up. It is the sub navigation that I am having trouble with.[code]
As you can see, it doesn't even get to the function before it gets thrown off. I have verified that the instance names are correct. The script and the MC I am trying to add it too [I/]are[I/] in the same frame, which is what's stumping me. Normally you get 1009 when the object you're trying to reference is not there, but mine is!!Obviously there is something wrong with my EventListener. I am not sure what else do; there is a gap in my understanding of AS.
If I set an Object = null, does that remove all references to the Object's variables assuming there are no external references to said variables? Or do I have to manually set all said variables = null?
View 4 Repliesfrom a url like this:Code:index.php?survey_user=83a3q7b8&survey_password=h44e954s'm getting NULL for both variables.My code:
Code:
vid.source="video/skeeter.flv";
vid.addEventListener(Event.COMPLETE, nextMovie);
[code].....
I've a question about variables in AS3 OOP. Do I have to set them to null or I it's not needed when I define them in beginning of the class? I just noticed someone doing so so I wasn't sure is it right or no.
private var _mcComponentHolder:MovieClip = null;
private var _mcComponentHolder:MovieClip;
I'm testing out some different things right now and I'm trying to make a box, that, when one of two balls is dragged and dropped into it, causes the correct color text to display (i.e. redBall displays "RED", blueBall displays "BLUE" when dropped into box).I've gone through a few different ways of doing this, but now I"m trying to use dropTarget.I'm finding that when I drop it into the box using the code below, everything works fine, but if I drop is anywhere outside the box, I get an error stating "Cannot access a property or method of a null object reference."I'm assuming that I'm just wording this second dropTarget conditional statement (if (e.currentTarget .dropTarget == null)) incorrectly, but I'm not sure how to fix it.Here's the code of the dropping function I'm using:[code]....
View 3 RepliesI'm having a little difficulty when it comes to getting objects ready for garbage collection.
I have some dynamically created movieclips.
Within each clip, I have a combo box and a close button. When the user clicks the clsoe button, it runs a function that removes all the event listeners for the close button and combo box, and removes the parent clip from stage. I also want to make the parent clip null, and this is where I get an error. I'm not sure how to tell Flash "make the parent of the close button clip = null.[code]...
I'm trying to call a function and pass a couple of properties to it however it's complain the object i'm attempting to target is null.
<mx:ViewStack id="vs" width="100%" height="100%" y="53">
<mx:Canvas id="view1" label="Community" width="100%" height="100%" backgroundColor="#ff9900" showEffect="WipeDown" hideEffect="WipeUp">
<mx:Label text="Community"/>
[Code]....
It's returning null the first time I click an image however subsequent attempts traces a value (I assume because it is set then, just not when the app loads). how to recognize it when the app loads?
i am getting the Parameter url must be non-null error while trying to pass the path of an XML file to an Shockwave flash object.The javascript code is as follows
<script type="text/javascript">
var so = new SWFObject("preview.swf", "", "100%", "100%", "9", "#ffffff");
so.addParam("allowFullScreen", "true");
[code]......
$output .="<keyword>".$_POST['keyword']."</keyword><name>".$row['url']."</name><occur>".$row['occurrences']."</occur><queryTime>".(substr($end_time-$start_time,0,5))."</queryTime>";
}
I want to check in Flex, if the value of name is null or not. I tried for these, but i am not getting any alert when the node value is empty.
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I am working on a rollover mapping like page for an instructional demo. Basically, the user rollovers clickable areas and a dynamic text box popups explaining what the link's utility is.
I have all the text dynamically set, there are styles for the text box (ie borders and padding) and then a drop shadow filter applied. However, upon viewing the SWF file the drop shadow does not seem to work consistently. OnRollOut it doesn't always do so and upon OnRollOver a different hotspot the dropshadow will duplicate. The duplicating of the dropshadow will either continue to do so or the OnRollOut will remove the dropshadow and reset the text box as it should.
[Code]...
I can't make this code work in Flash CS4, it keeps saying that the listener parameter can't be null or that the index is invalid.
ActionScript Code:
addEventListener(Event.ENTER_FRAME,f_entraframe);
function f_entraframe(event:Event):void[code].....
movie clips have defined functions for rollOut, rollOver and Release. On Release rollover function is set to null (on.Rollover {bla, bla, bla movieclip.onRollOut = null}.Is there a way to re-enable this function?
View 3 RepliesI recently bumped into an issue in the Flash IDE that you may be able to shed some light on for me.As I drag a movieclip around the stage, an enterFrame event listener is fired.For each enterFrame that fires, a point is placed onto the stage, stored into an array and the event.updateAfterEvent() method is called.
var p:MyPoint = new MyPoint(x,y);
parent.addChild(p);
myArray.push(p);
[code]......