Actionscript 3 :: Difference Between The Array And ArrayCollection In Flex?
Feb 24, 2010Difference between the Array and ArrayCollection in Flex?
View 2 RepliesDifference between the Array and ArrayCollection in Flex?
View 2 RepliesTo optimize my application dictionary is a better option or arraycollection where both satisfy my needs.
View 1 RepliesWhile making my choice b/n Array and Arraycollection I get confused why whould I use one and why not another. I have read the theory in langref but apart from that is there some general advantages/disadvantages of one over the another that you have learned from your experience.
View 4 RepliesI know that an ArrayCollection is a wrapper over an Array, but what I wanted to know is when to choose one over the other? Will the over usage of ArrayCollections result in performance?
View 1 RepliesI'm a bit new to flex and cannot get my head around this problem.
I have a string list path.
path 1 - "one/two/three"
path 2 - "one/two/four"
path 3 - "five/six"
i need an advanced datagrid to show a tree structure like so
one/
...two/
........three/
............four
five/
.......six
but i want to achieve this dynamicall with arrays, objects, or arraycollection (as applicable).I need to loop through each string path using string methods which isnt a problem but how do i create "DYNAMIC" (depth) children?
Is there any built in functionality to convert an ArrayCollection to a jagged string array? I have an Arraycollection of objectproxies that I get from a SOAP webservice (asp.net datatable) that I modify and want to send back.
View 1 RepliesI want to give an array index to array collection let say 205 when it is started is it possible to do so in flex or any alternate of this.actually I need to index the objects with a specific no, in 2D array collection
say
205 a c d g f d
268 s g h g f f
805 d g h h f f d
where integers are indexes and alphabets are object referenced by these integers
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].....
I have an arrayCollection with the following structure:
[Code]...
the AC is defined as follows:[Bindable] private var projectErrorsAC:ArrayCollection = new ArrayCollection;
I'm using this AC in a repeater to display each error. After each error is shown, I've placed an "Accept" and "Deny" button. Once the user clicks either one of these buttons, I'd like to call a function that removes the particular error from the AC. Here's what I have so far:
[Code]...
I have this code to try to acess the values of the array in the arraycollection but it does not work it actually creates a value to the end of the arraycollection. can anyone tell me what im doing wrong i basically whant to modifys the individual arrays in the arraycollection and add Login_user.
Code:
for(var i:int = 0; i< dispArray.length; ++i){
dispArray.addItemAt({"login_user":"XXX"},i);
}
flash knows this is a 2d array, correct? Code: var arr:Array= new Array([1,0,6],[4,3,7]); i see it treats it as one. My question, is there any difference to declare each array as such, before pushing them to the main array? trace(arr[0]);// i know it traces the arrays contents, but if it could, would it tell me this is data type Array , exactly the same as if i had declared it?
View 2 RepliesWhat's the difference between looping through an array or using array.every() to assign a callback to each array element?
View 3 Replies<fx:Array>
<fx:Object name="Jodie" country="UK" language="English"/>
<fx:Object name="Kate" country="USA" language="English"/>
<fx:Object name="David" country="France" language="French"/>
</fx:Array>
But I want to do this dynamically from results that I get from a DB.I have an attendance program and I want the object's names to be "Date","In","Out" and the values to be, of course from the results that I get.
i have a collection looking like this :arr.getItemAt(0).closet.clothes[0].color. the arr is an ArrayCollection data type..the clothes is an Array data type..when i try to bind this to an mxml component , i get a warning :"Data binding will not be able to detect changes when using square bracket([]) operator. For Array, please use ArrayCollection.getItemAt() instead."this is not possible as the Array class has no method getItemAt().
View 0 RepliesIs there a way i can convert my array which is in the below format[code]...
Tricky part here is, i will not know how many values/lables user will enter, so it has to dynamically pick the array's.
I have been working on sorting Arraycollection like ascending , descending the numeric list. Total length of my collection will go up to 100. Now I want to preform sort to nested data like this
Data Structure
Name : String
Categories : Array ["A","x or y or z","C"]
Categories array will have maximum 3 items , out of that three items the second item can have 3 different values either X or Y or Z. My result data looks like here
{"Mike" , ["A","x","C"]}
{"Tim" , ["A","y","C"]}
{"Bob" , ["A","x","C"]}[code]....
anyone please explain how to sort this type of data in a way showing all "x" first , "y" next and "z" at the last and vice a versa.
What the difference between an object and an array is?
View 14 RepliesPremesis:I am using actionscript with two arraycollection containing object with value to be matched...Let's assume I have two list of elements A and B (no duplicate values) and I need to compare them and remove all the elements present in both, so at the end I should have
in A all the elements that are in A but not in B
in B all the elements that are in B but not in A
now I do something like that:
for (var i:int = 0 ; i < a.length ;)
{
var isFound:Boolean = false;[code].....
I cycle both the array and if I found a match I remove the items from both of the array (and don't increase the loop value so the for cycle progress in a correct way).I was wondering if (and i'm sure there is) there is a better (and less CPU consuming) way to do it...
I'm making an activity that involves measuring the depth of a fictitious river at various points. I have an array containing those depths at the various points and a slider for traversing through the depths and outputting to a textfield.
As the user moves the slider up and down, they can see the depth of the river at that point and plot it onto a graph. What I would like to do is be able to figure out the depths inbetween the explicitly defined values.
here is the code, it's pretty simple:
[Code].....
How would I go about figuring out the values inbetween?
I have a advanced datagrid and populating some data by using arraycollection. And i am filtering the arraycollection, the arraycollection index got changed.
Arraycollection:- [0] - name: abc
[1] - name: hello
[2] - name: hello1
[3] - name:hai
after filtering the arraycollection as 'hell' , the array collection is displaying like the below:
Arraycollection:-
[0] - name: hello1
[1] - name: hello
Can i know the reason why the index got changed after filter it?
* no server side code for filtering. it is only flex side filtering.
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]....
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>();
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.
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,
View 1 RepliesIs 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.
View 1 RepliesContext:
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?
is there any way to use ArrayCollection (from mx.collections.*) in Flash CS3/4/5? How?
View 2 RepliesI have an ArrayCollection with data; a trace of random index of this using
[code]...
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?
View 1 RepliesI 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]....