Flex :: ArrayCollection Versus Vector Objects In FLEX?
Apr 20, 2010
the applicable differences between an ArrayCollection and a Vector in flex? I'm unsure if I should be using one over the other. I saw that Vector is type safe and that makes me feel better, but are there disadvantages?
public var ac:ArrayCollection = new ArrayCollection();
versus
public var vec:Vector.<String> = new Vector.<String>();
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Similar Posts:
Jul 25, 2011
I new to flex, I have a class shown below:
public class Items extends Object
{
public function Items(){
super();
}
public var name:String;
public var count:int;
}
How do I create an ArrayCollection of type Items?
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Jul 4, 2009
I'll show you the function first.[code]As you see, the order i put the items in the ArrayCollection is Areal, then Verdi (area, value)When i loop through the collection later, the order changes. Now it is Verdi then Areal (value, area).Does anyone have an idea of what might be the problem?It really ruins things when I pass it over to a PHP-script for table-making in html later.(I have several different dynamic DataGrids that differs in size and "values", so I can't really point directly to f.ex "Areal" in my PHP-script)And by the way, does anyone know how i can remove that pesky mx_internal_uid?
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Mar 26, 2010
What is serialization support like for the new Vector class? I have a Vector.<GameMove> which I'd like to serialize into a ByteArray. GameMove is a custom class. I presume it's necesssary to call registerClassAlias() on GameMove, but do I also have to register Vector.<GameMove>? It's it it's own distinctive type, or is it kinda composed of those two types?
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Oct 27, 2009
I'm new to Flex and am using TileList bound to an ArrayCollection. The array collection is empty at load time, and then updates with the results from am HTTPService call. The problem is that the item renderers aren't being rendered as expected, I'm guessing because there was no data when they were first rendered at load time. Here's simplified example:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" >
<mx:Script>
[code].....
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Mar 24, 2010
I am using Flex 3 and make a call through a RemoteObject to a Java 1.6 method and exposed with BlazeDS and Spring 2.5.5 Integration over a SecureAMFChannel. The ActionScript is as follows (this code is an example of the real thing which is on a separate dev network);
[Code]...
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Oct 2, 2009
This is related to other question. But never mind it. I've fixed part of it. I have a DataGrid, its data provider is a ArrayCollection, and i want it to parse all itens in it (Object Type) to a String. For that I've done a "for each" loop, it manages to get the Object and its values, but if i have more that one object it only gets the last object, don't know why.
First i will show how these items are added to the ArrayCollection, that way you will understand the rest much easily. In the Main Application i have the ArrayCollection:
[Code]...
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Feb 4, 2011
i have a problem using the itemRenderer functionality. When using an ArrayCollection the visible Data in the DataGrid using the itemRenderer will be rendered just fine. But if i start scrolling the entries are repeating in the cells using the renderer. The cells are not filled with date according to the id. What mistake i'm doing here.
I read a lot of the explainations like:
[URL]
here is the code for the set data function (itemRenderer is extending HBox):
override public function set data(value:Object):void {
_data = value;
if(data!=null)
[code]....
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Jul 23, 2011
If I want to pass in a vector to a function, a vector of any object specifed would it be someVetor:Vetor.<T>? beause FB 4.5 sais T is undefined.
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Jun 9, 2010
I am planning to start a new project in as3 and I want Dependency Injection in the project. I found that parsley and Robotlegs are two popular frameworks for implementing DI in AS3. Which is the best one among these two?
My main requirements are
lightweight
minimal learning
extensive documentation and active helping community
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May 5, 2011
In Flex world, is DTO / VO same as Presentation Model?
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Oct 10, 2009
For developing simple games with the Flex SDK, what are the consequences of using a Canvas object, versus a UIComponent object, as a drawing surface? Are there performance issues with either one? Are the methods generally the same? Searching around, it seems that most sample code I've found uses UIComponent. Is this just customary, or are there reasons?
I already know one odd difference - I had developed a simple Pong game using:
public class MyGameCanvas extends UIComponent
and then decided to replace UIComponent with Canvas. This caused the line to fail:
[Code]...
However, I have to confirm something, being new to Flex and the various terminology. I'm presuming that people mean I should not be using MXML for games, when they said Flex SDK. Since I thought the Flex SDK was what provided the compiler that generates .swf files. Otherwise, where/how would I even compile AS3?
Assuming that's the case, then my question would be about the suitability of using both MXML and AS3 for (simple) games. Based on what I've read about both, it seemed like the intended use of them was MXML for the interface elements, and AS3 for everything else. Is the overhead that bad for MXML?
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Oct 19, 2009
If I compile this[URL]in WonderFl it works great in both my browser and on my desktop.However, when trying to do it in Flex - Line for line - it runs very badly struggling to get 5fps.This doesn't make any sense, WonderFL uses the flex engine to compile so why does my SDK suck? I'm doing this on OS X as well by the way.. if that makes any difference?
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Feb 2, 2010
Inspired by this Flex question, is it seen as better practice to dispatch an event back to the parent app, as opposed to calling a method on the instance of the parent app, from within a module? To me it seems that the module shouldn't know what methods are available at the parent, as such approach leads to tight coupling.
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Sep 23, 2010
I'm using deeplinking in a Flex 3 application. I've got a ViewStack and I'd like to use the id's of the canvases in the url. I've read that search engines prefer hyphens over underscores as word separators. So, the search engine sees "big-book" as a separate word, but "big_book" as possibly one word. Also, underscores are obscured when a link is underlined. For the above reasons, I thought that it would be good to use hyphens. The problem is that Flex doesn't allow hyphens in an id.
<ViewStack>
<Canvas id="my_stuff"></Canvas>
<Canvas id="my_stuff_more"></Canvas>
<Canvas id="my_stuff_lots"></Canvas>
</ViewStack>
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Jul 27, 2009
Which is a much better practice in binding a value in Flex?
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Aug 26, 2011
I am writing an application in Flash Builder 4.5. I am also writing a PHP Web service to access data from our MySQL database. This Web service will be made available to third party clients for them to develop applications to access our database as well, via SOAP.
Is there a big performance difference between connecting to the service in Flash Builder via connecting directly to the PHP file vs. connecting to a Web Service via SOAP?I would kind of like to connect to this service the same way that our clients will, to make sure things stay as uncomplicated as possible for future development, but performance is my main priority.
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Jul 28, 2011
Is there a performance and/or memory usage difference between these two scenarios?
Scenario 1: N visual elements all added to stage;
N-1 have visible = false, 1 has visible = true;
Scenario 2: N visual elements, only 1 added to the stage at any time.
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Jul 24, 2009
In Flex, it's easy to convert the XML to Object and to ArrayCollection by using var decoder:SimpleXMLDecoder = new SimpleXMLDecoder(); decoder.decodeXML( xml );
But is there a good way to convert ArrayCollection to XML.
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Sep 22, 2009
I currently have an arrayCollection in Flex and I want to sent it to PHP (Zend_AMF). According to the Zend_AMF wiki, sending an arrayCollection over directly will force Zend_AMF to cast the arrayCollection as an object which is no good. I'd rather have an array of my models. I assume the best way would be to convert the arrayCollection to an array in flex and then send it over. Is this true, and if so how would I do that in Flex 3? If you have a better recommendation,
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Oct 21, 2009
Is there any way in Flex where in we can sort an arraycollection based on strings .I have a dataprovider with strings like "Critical" "High" "Medium" "Low" where in I need to sort it in such a way that I need Critical to be displayed on the top and next High , Medium and Low follows.
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Mar 12, 2010
Context:
I use an ArrayCollection object as follows:
1) Number of elements is fixed.
2) Elements are inserted at a given position, based on some order.
Can I set the max size of the ArrayCollection? Will fixing the size improve the performance, as elements keep getting inserted into this collection?
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Dec 2, 2010
is there any way to use ArrayCollection (from mx.collections.*) in Flash CS3/4/5? How?
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Mar 1, 2011
I have an ArrayCollection with data; a trace of random index of this using
[code]...
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May 14, 2011
I would like to create a new AC instance with a dynamic variable which is nca1, nca2, etc. Without define using hardcode variable name, it is possible to do that in a loop?
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Jul 14, 2009
I am creating a RSS Feed application based on a data, and I have the following:
I have an ArrayCollection that is pre-populated with data. I am sorting through the ArrayCollection, get 1 piece of data (condition), and need to connect to an RSS feed which returns me the title, and I set my ArrayCollection in correspondence to condition -> title.
public function updateArrayList(list:ArrayCollection):ArrayCollection {
trace(list);
for(var i:int = 0; i < list.length; i++) {
//Alert.show(list.getItemAt(i).condition);
[Code]....
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Aug 3, 2009
After applying a numeric sort to my dataprovider(Array Collection), I can not reorder the items via a tilelist. Do I need to remove the sort from the arrayCollection. If so, is it just a case of setting collection.sort = null ?
var sortField:SortField=new SortField();
sortField.name="order";
sortField.numeric=true;
var sort:Sort=new Sort();
sort.fields=[sortField];
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Aug 6, 2009
I am trying to get the contents of an arraycollection to print out using my debug function (which takes a string). Anyone know how to do this? I would like it would be rather easy but can't seem to find a way...I get the word "Object" printed a lot of the time.
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Nov 11, 2009
I want to load data from a external XML file, using a HTTPService, and on the ResultEvent of the same HTTPService i want him to populate a ArrayCollection with the data from the XML.
I think a ArrayCollection is the ideal for this XML.
XML
<?xml version="1.0" encoding="utf-8"?>
<PhotoGalleryData>
<Photo>
[Code].....
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Feb 2, 2010
I have built an image cache which is an ArrayCollection containing images. I have built functionality so that the cache can hold a max of 250 images. However, the images can be of a different size, so it's better to limit the total memory size of all images in the ArrayCollection. How I can get the total memory size of an ArrayCollection without looping through all the items in the ArrayCollection?
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