Flex :: How Much Data Is Too Much For An Array
Jan 25, 2011
I have a flex webapp that retrieves some names & addresses from a database. Project works fine but I'd like to make it faster. Instead of making a call to the database for each name request, I could pre-load all names into an array & filter the array when the user makes a request. Before I go down this route though I wanted to check if it is even feasible to have an application w/ 50,000 or 1 million elements in an array? What is the limit b/f it slows down the app? (I anticipate that it will have a lot to do w/ what else is going on in my app but for this sake lets just assume the app ONLY consists of this huge array).
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Oct 15, 2009
I have an xml file (externally saved) that is similar to the following:
[root]
[main]
[title]...[/title]
[Code]....
What I like to do is to get what's in [title] tag using HTTPservice, import it into Flex, and save it as array objects, and do the same thing for [content]. This way I can later refer the array object saying title[0] or content[2].
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Oct 7, 2010
My data grid is displaying stale data, rather than the real time data available in it's data provider (array collection). I've tried refeshing the data in the collection, but that has no effect. Below is my code, does anyone see what could be the problem?
<mx:Accordion/>
<fx:Script>
<![CDATA[[code].....
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Oct 9, 2010
I have an array collection of strings and integers (which I have displayed in a data grid) and I am wondering if it is possible to export the array collection into an html table? or even a text file for the user to download
I found some pages that had an export to .xls files but I want to stray away from that for now.
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Oct 11, 2011
I have a app that currently gets event data from facebook and displays this into a list[code]...
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May 9, 2011
I want to export the data kept in an actionscript array as a text/CSV file. I have searched and found a few that did datagrid to excel exports but they are complicated and confusing
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Mar 12, 2010
I have a datagrid that uses an array of objects as the data provider. The objects are essentially key/value pairs:
{ foo:"something"}
{ bar:"hello"}
{ caca:"lorem"}
The datagrid has 2 columns. The first column is the key and the second column is the value. Right now my grid looks like:
My dataFormatter function makes sure that depending on the column (i.e. the dataField value) the correct key or value gets printed out. This works fine for displaying. However, as soon as I try and edit the value field it essentially adds a new value into the object with a key of '1'. For example, if I edit the {caca:"lorem"} object it will then contain the value {caca:"lorem",1:"new value"}.
Is there any possible way I can set the DataGridColumn so that when I edit a value it will update the value associated with the key rather than inserting a new value? I've tried using a custom item editor but it still does the insert. It seems like I need to be able to update the 'dataField' with the actual key value but I'm not sure how to do that.
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Jul 22, 2010
I am building an application in Flex Builder 3. Yes, I know that it has an auto-magic feature to build datasheet, but that will not work. I see many Flex controls, such as combo box, can take an array as a data source.
My question, therefore, is (1) How do I send the request from my action script to my PHP form to request a record set. (2) Presuming that my dataset is in a PHP assoc array, how do I format it to send it back to Action Script. (3) How do I take the data received from the recordset, and put it inot an actionscript array, suitable for use as a data source.
I can connect to my database in PHP, and query it just fine, so I don't need help with that. For consistency, and humor, lets presume that I have the following data in an assoc array that I pulled from a database.
[Code]...
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Dec 8, 2010
I think I must be missing a step here; I have different data being pulled from an array created from xml depending on a variable (_currentTrackNum).. and the data changes if I set a different initial value for it; but if I change the variable once the program is initialized, none of the data changes even though I rerun the call with the changed variable.[code]
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Jan 28, 2011
I have an editable column in a datagrid. How do i copy the contents of that column into an array? The dataprovider for the datagrid is an array
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Aug 14, 2009
I want to subset an array. I have the following array
[Code]...
Now based on user requirement I want to select a range of sell data for some month.For example sometime it may be sells data from Apr to Dec,sometime may be Jul-Oct.How can I do that without hampering the original array
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Feb 18, 2010
how much memory (and swf size) the various built-in data types take up in actionscript 3? I'm specifically interested in int, Number, and (dense) Arrays or Vectors. I'm working on a project where I need to embed large amounts of structured array data, which is already in C++ format, so porting is just a matter of copy-paste, search-replace. I've already had a look at Adobe's lowdown on datatypes but it's not specific enough, and doesn't mention Arrays, etc.
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Dec 13, 2010
I have bought Learning AS 3.0 (O'Reilly) but I have been having difficulty getting one of the tutorials to run. The tutorial shows how to record data from a microphone to a byte array, playback the saved data and save as a WAV file. For some reason, I can't get this working. When the swf runs, the Flash Settings screen doesn't pop up to request permission to access the microphone but I can still trace properties such as gain.
I've uploaded a zip containing all the classes and an FLA - just use RecordMicrophone_Example.as file as the document class. Here is the problematic area of the code:
[Code]....
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Jul 20, 2006
I have No problems inserting data from flash to PHP into MySQL,it's sendind them back properlly.All I'd like to see happen is for one row of data to be inserted into a dynamic text field. here's what i've got if i access this php file, it prints out a vertical list from
a single MySQL row,I was happy.
$query = "select row from table";
$result = mysql_query($query, $db);
while($row = mysql_fetch_row($result))[code]...
and Instead of the vertical list (which i would love to see)i get an unparsed data array.
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Nov 9, 2006
I have this code inside my flash to name my navigation menu. Now I want to put this outside flash and load it via XML. How do save my different arrays into a variable for later use in my code?
In my nav fla (what i want to load from XML):
Code:
// MAIN MENU ARRAY
var mm_array:Array = ["MAIN1", "MAIN2", "MAIN3", "MAIN4"];
// SUB MENU ARRAY
[Code]...
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Feb 5, 2007
Let's say you have the following xml document. Now how do I access the name thumb here is my loop. Also I want to store the value in an array but I don't want the xml tags to be stored in there as well. How do I get rid of the xml tags with assigning the data to an array.
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Mar 25, 2009
I feel like this should be really easy, but I don't get what I need to do.I have a value bgW[j] stored in "j" equaling a number.But I can't seem to get it to register as a number.What commonly needs to happen to convert this value into a numeric datatype?I've tried a bunch of stuff: eval, parseInt, multiplying it by 1.
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Jun 5, 2009
I am working on a project in which I am suppose to matain an array of movieclips, and I can also convert the movieclips into bitmap data. so I would like to know which one is the best to use either maintaing movieclip array or bitmap data array.
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Jan 20, 2007
I have successfully loaded an external XML data file into mymovie. Now I would like to save the node values into an array so ican manipulate and call as required...Is this possible or is there
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Jun 17, 2009
In flex 3 I have a hierarchical data structure. I would like to display the content of it in a tree. My problem is that I have nodes which data calculated from children nodes. How to structure the hierarchy to make automatic changes to those parent nodes, if their children's data changed? For example:
Every node has a warning flag. If some of the children warning flag changed to true, then the parent warning flag should change automatically set to true. A node integer field is the sum of the children integer fields, and if any of the children changes, the parent integer field "calculates" the sum immediately. Is there an easy solution wit good structuring changes happen automatically, or I have to make some custom functions?
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Dec 28, 2009
I have to populate an Advanced Data Grid which have the following fields: Continent->State->Society-->Actual Value-->Estimate Value I want to simulate a financial market so i have to change some of the values by asynchronous request from an HTTPService; If necessary i'll post the .as file, but it is generated automatically by Flex Builder.
Here's the code of the client side Flex/Air application:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute"
[Code].....
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May 25, 2011
I want to separate the data from the PHP call to Different CollectionArrays So that I can use the data for a bar-graph;
I created a static version of the bar-graph and separated the Collection array manually I don't want this done manually I need to do it dynamically. So what I am trying to understand is where to put the event-listener how to add to a collectionArray then once the collection array(s) are built. use that information to build the bar graphs...
/*
*
36, > 2 years, Compliance
6, 0-90 Days, Compliance
[Code].....
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Jan 10, 2012
I've got a Gridcolumn in a Datagrid (Spark). The Column's dataprovider is a Number value that gets updated via Binding.Now, without an item renderer the cell displays the correct values.If I set an item renderer, I can't access the values in this renderer.My renderer looks like this, so nothing really do here (for now) but to trace the value, but the value is always NaN.
<?xml version="1.0" encoding="utf-8"?>
<s:GridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" width="100%" height="100%" >[code].......
without the renderer, the column displays the correct values, so apparently the DefaultGridItemRenderer works fine.As requested, here is my Datagrid;
<s:DataGrid id="dataGrid" dataProvider="{_listItems}">
<s:columns>
<s:ArrayList>[code]..........
_listItems is an ArrayList with instances of a model class, which has (amongst others) a property called change of type Number.
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Mar 15, 2012
I have been goggling a lot to find anything with link-based data visualization in Flex 4. something like below screen shoot (made using Ravis). Where user can drag these nodes, without removing the links and on double click of any node we can set some properties for that particular node. I found this Ravis (Birdeye), but not much of examples and support is available for that.
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Jul 27, 2009
I have a data grid who's data provider is set to an XML object.
Code:
<mx:DataGrid id="streamMonitorGrid" dataProvider="{_data.stream}" height="100%" width="100%">
[code].....
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Dec 4, 2009
I have a DataGrid whose dataProvider is an Array of int Arrays (each with different lengths). Since each row has variable size (and I want to display all the data), I decided to extend DataGridColumn and overwrite the itemToLabel function to be able to display the data. The problem is that I also need to display the data differently depending on the int value.
I believe the only solution is to write an itemRenderer, but the only input the itemRenderer.set(data) function receives is the entire int Array. I believe I need either the exact string returned by itemToLabel or the column index of the cell the itemRenderer is for (to basically do the same parsing I implemented in itemToLabel).
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Nov 11, 2010
I am trying to drag and drop hierarchical data in the same advanced data grid, and I would like the data provider to updated when the ADG is updated. (I want to be able to save and load this tree, so it is important that drags and drops are saved.)
[URL]
The sample app has an ADG showing hierarchical data as well as flat data. The first column of each datagrid shows the rowindex of the underlying data.
If you rearrange the items on the left ADG, the row indexes become unordered. If you click traceTree you see that the data provider is not in order.
On the other hand if you do the same on the right, the row numbers stay ordered even when the objects move around and if you click traceFlat, the data provider is in the order shown on ADG
My goal is to have the data provider order match the ADG order for the left grid which is displaying hierarchical data.
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Jan 7, 2010
need to load 10 records from database in advanced data grid. After i scroll the advanced data grid. it has to load 11 to 20 records etc.
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Oct 5, 2010
I have a radio button group within a data grid, whenever I attempt to change the selected radio button the web page crashes. Below is how I put together the radio button in the data grid.
MXML
<mx:Accordion>
<fx:Declarations>
<s:RadioButtonGroup id="cover"/>
[Code]....
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Nov 4, 2011
If user change the value of the TextInput, then click refresh button to retrieve the data model from backend again, the GUI value will not change back. Re-binding not happen, Since the value of data model not changed, no propertyChanged event fired.In this case, I must Programmatically set the model value to the GUI after data refreshing done.I know bi-directional binding can solve this problem(when user change value on GUI, set the new value to data model immediately). But sometimes I cannot use bi-directional binding, for example, the data model is a int, but user input a non-int value, I cannot set the value to data model. So the value in data model do not change, when refresh data, rebinding still not happen.
This will make the data binding useless. How to resolve this?I put pseudo-code here for now, I will put real code later:1. retrieve a data model from server, via blazeds or something else.2. bind the model to a TextInput on GUI.3. user change the TextInput text.4. User click a refresh button, triger retrieve the model value again.5. Now since the model value do not change, no PropertyChanged event fired.6. GUI value still is the user's input, not the value from the model. can clear the model value before set the velue back, make re-binding happen.(but sometimes you do not know how to clean the model value, take int for example, you may do not know the original value and happen set the same value). Or I can manually set the model value to GUI. But both are not good looking.
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