to access the data in the ArrayCollection collection

Similar Questions

• How to access the Flex collection ArrayCollection in Action Script components?

  I have this code-

  < mx:Label text = "Style" / >
  < mx:ComboBox id = "cboStyle" initialize = "{changeSkin('skins/Plain.swf') ;} "change ="{changeSkin (cboStyle.selectedItem.data) ;} ">
  < mx:ArrayCollection >
  < mx:Object label = "Plain" data="skins/Plain.swf"/ >
  < mx:Object label = "BlueTan" data="skins/BlueTan.swf"/ >
  < mx:Object label = "Brauwny" data="skins/Brauwny.swf"/ >
  < mx:Object label = "Darknite" data="skins/Darknite.swf"/ >
  < mx:Object label = "iCandy" data="skins/iCandy.swf"/ >
  < mx:Object label = "Minty" data="skins/Minty.swf"/ >
  < mx:Object label = "SimplicityGray" data="skins/SimplicityGray.swf"/ >
  < mx:Object label = "SummerSky" data="skins/SummerSky.swf"/ >
  < / mx:ArrayCollection >
  < / mx:ComboBox >

  I would like to do instead of initialize = "{changeSkin('skins/Plain.swf') ;} "East of refers to an item in the collection ArrayCollection.  How can I do this?  I'm relatively new to Flex.  I guess that there is a way to access the ArrayCollection collection and then access the individual table entry.

  Thank you

  Aaron

  Initialize = "{cboStyle.DataProvider.getItemAt (0) .data ;}}" »

  If this post has answered your question or helped, please mark it as such.

• Access table in the arraycollection collection and add the item at the end of the table

  for
  
  
  "login_user":"XXX"},i);
  
  //mess2=sess_MessArr[i2];
  //mess1=dispArray[i2].fwchat_message
  
  //searchArray(mess2);}
  
  
  
  
  
  (var i:int = 0; i< dispArray.length; ++i){
  
  dispArray[i]. 
  dispArray.addItemAt({
  

  
  I have this code to try to access the values in the table in the arraycollection collection, but that's not it actually creates a value at the end of the arraycollection collection. can someone tell me what im doing wrong I basically want retransmits the individual tables in the arraycollection collection and add Login_user

  So, I guess your ArrayCollection collection holds an array of objects, as follows:

  public var myAC:ArrayCollection = new ArrayCollection([{first:"bob",last:"smith"},{first:"jim",last:"jones"},{first:"mary",last:"allen"}]);
  

  And you try to add a new property of login_user to each of them, right?

  for each (var obj:Object in myAC) {
       obj.login_user = obj.first + "83";
  }
  

  Each person would be firstly, properties last and login_user.  In my example above, all the login_user would set their name + number 83, so adjust you accordingly for your application.

  It is the ease (for each rock for this situation).  However, if you want to paste the iterative approach, you have published, you can try this:

  for (var i:int = 0; i < myAC.length; i++) {
       myAC.getItemAt(i).login_user = myAC.getItemAt(i).first + "83";
  }
  

  I think that the for each syntax is clearer, but anyway works the way I think you want.

• How to check whether or not the arraycollection collection is initialized

  Hi all

  I am bit new to use the collection arraycollection in flex. I'm having this particular scenario, where I get Server data in a table. So I have to check if the arracollection I created is initialized or not. If it is not initialized I need to initialize it or other wise, just add collection from table to table. Here is the code snippet

  currentTrajectory = new collection ArrayCollection (event.result as Array);

  var _multiTrajectoryEvent:MultiTrajectoriesEvent;

  _multiTrajectoryEvent = new MultiTrajectoriesEvent (MultiTrajectoriesEvent.DRAW_AUTO_TRAJ);

  If (!) (_multiTrajectoryEvent.trajectories.source is nothing))

  {

  _multiTrajectoryEvent.trajectories.addItem (currentTrajectory);

  }

  else

  {

  _multiTrajectoryEvent.trajectories = new ArrayCollection ([currentTrajectory]);

  }

  But unfortunately the above code does not work for me, because the arraycollection collection is not initialized first, there is no way of checking me if it is initialized later or not as the compiler gives me the error checking to null...

  Can any Walter suggest how can I check if the table collection is initialized or not?

  I would appreciate any suggestions and thouhgts for the same

  Thank you

  Akshay

  Sorry to say, but it's not the right approach...

  I'm abt don't know what is exactly done so I'll give a generic example...

  I have an ArrayCollection collection...

  private var arrC:ArrayCollection;

  Maybe it's getting used internally in several places, so you be sure if she be initialized already or not. Then use a code something like that...

  If (arrC! = null & arrC.length > 0)

  {

  ...

  ...

  }

  If you are using

  If (arrC.Length > 0)

  {

  ...

  ...

  }

  and it is not initialised it will give exceptional at the time to compile...

  For a logic if(a && b) be true both a and b must be true, so if same first one (a) is false it will not evaluate the second logic (b).

  Thus, the previous logic works.

  concerning

  Nishant

• get the fields of the arraycollection collection?

  I want to loop through a collection of table and access all the items (columns)
  
  the arrayCollection collection looks so
  
  .columnOne [1]
  .columnTwo [1]
  .columnThree [1]
  .columnfour [1]
  

  [Bindable] public var dataSet:ArrayCollection = new ArrayCollection();

  protected function application1_creationCompleteHandler(event:FlexEvent):void

  {

  TODO self-generating method stub

  var d: Array = new Array()

  var int count = 5;

  var c:Number, r: Number;

  for (var i: int = 0; i<>

  {

  c = Math.Floor (Math.Random () * 10)

  r = Math.Floor (Math.Random () * 10)

  d.push ({cost: i + 1})

  Recipes: 2 * i + 1

  });

  }

  dataSet.source = d;

  Call();

  }

  function call (): void

  {

  for each (var point: Object in dataSet)

  {

  (var key: string in point)

  {

  trace (Key)

  trace ([Key] Item)

  }

  }

  }

• Export the ArrayCollection collection in XML file

  Hi all

  Is it possible to export a Flex ArrayCollection collection to an XML file.

  My collection of table is displayed in a datagrid as follows

  < mx:DataGrid = "360" x y = "120" width = "448" height = "200" dataProvider = "{questionsArr}" >
  < mx:columns >
  < mx:DataGridColumn headerText = "Issue" dataField = "issue" / >
  < mx:DataGridColumn headerText = dataField "Start" = "start" width = "40" textAlign = "center" / >
  < mx:DataGridColumn headerText = "Stop" dataField = "stop" width = "40" textAlign = "center" / >
  < / mx:columns >
  < / mx:DataGrid >

  And I want to output the XML to look like this

  < cue >
  "< question section =" "start =" "stop =" "/ >
  "< question section =" "start =" "stop =" "/ >
  "< question section =" "start =" "stop =" "/ >
  < / cue >

  Is this possible?  I mean all the data is ready, he just needs to be saved. .

  Hi djh88ukwb,

  Try something as shown below in the link by performing a loop through the arraycollection collection and forming the knots... the way you need...

  http://nsdevaraj.WordPress.com/2008/08/20/ArrayCollection-XML/

  Thank you

  Jean Claude Chari

• Is it possible to search the ArrayCollection collection by index?

  Hi all

  I know, we can loop and compare each element of the ArrayCollection collection to get the correct item that we want. Obveriously, performance is going to hurt and it is not a wise method of search. Can we create an index for the key field of each item? Or any other class offering such a feature?

  Thank you

  When you say "a clue" are you talking like one in a table of database index?  That is something that can speed up a search?

  I'm trying to understand your desire and I think that what I hear, is that you have an ArrayCollection collection contains a number of objects.   When you want to find a particular object, you have found a way to locate the desired instance to browse each item in the collection ArrayCollection and ask "this element is equal to the key of the object I'm looking for?   I think that you are concerned by the amount of time it can take.

  Go back decades to my knowledge of computer science, this is an o(n) algorithm where n is the number of items in the table.

  Now, if there was an 'index' (ala databases) on the data, so if this index have been sorted, you would be able to find your match in O (log n)

  You can pay an O (n log n) cost the sort index when the data structure is created, but if you have a large number of research, then it can pay for itself.

  I'm not aware of any function that will help you on this out of the box (but that doesn't mean not there does not exist, only that I don't know about it.)

  I would like to also truthly ask yourself "is it worth the cost?   How many items you will have a typical table?  How often do you locate an entry in this table?

  Neil

• Add a line of DataGrid using the ArrayCollection collection

  Work of one of these, when I hard code do it programmatically is not:
  
  Hard-coding approach 1 - *.
  var acData:ArrayCollection = new ArrayCollection();
  ...
  
  Each DataGridColum has a dataField like "col1", "col2", "col3", etc...
  Therefore, adding items like this works
  acData.addItem({col0:"testa",col1:"testb",col2:"testc",col3:"testd",col4:"teste"});)
  
  
  2 - programming approach *.
  But adding items like that does not work
  for (var j = 0; j < dataRows.length (); j ++) {}
  var t:String = [j] of dataRows m:System.NET.SocketAddress.ToString (); dataRows is of type XMLList, data are formatted as the format above
  I did a breakpoint to check and someone else watch the channel and it matches the format that works.
  acData.addItem (t);
  }
  
  When I try the second approach, I get all the content of the string in each cell of the grid, where, in the first approach, I get "tested" in the first column, "testb" in the second column (without quotes of course), etc...
  
  Anyone know why there is a difference or what I am doing wrong?
  
  Thanks in advance.
  
  
  

  I guess that's because in the second approach, you add a string to your ArrayCollection collection instead of an object as in the first approach:

  acData.addItem({col0:"testa",col1:"testb",col2:"testc",col3:"testd",col4:"teste"});) This is an object with the properties that you add to the ArrayCollection collection

  var t:String is dataRows [j] m:System.NET.SocketAddress.ToString ();. It is a string, not an object
  acData.addItem (t); you add a string to the ArrayCollection collection

  You must take your XML string and generate a new object, as in your first approach, using the End Sub

• Summary of the ArrayCollection collection

  Hello!
  I tried to see if there is a way to create summary with the grouping columns data so that summary data can be used with other than AdvancedDataGrid components (such as graphics, etc.). I have flat (about 5 rows of K with 20 columns) data in an ArrayCollection collection and need to cut out the data about five different ways for graphics.
  I could do it manually while browsing the collection (or get the data aggregated from BlazeDS service sets), but I was wondering if there is a function that can be used for grouping.
  I don't know that if it's a good one to do what would be the aggregation on the client (I feel it takes too long) - I'd be better to get the data aggregated from the server?
  
  Thank you
  RAM

  "rsarma" wrote in message
  News:gg2eqg$H15$1@forums. Macromedia.com...
  > Hi!
  > I tried to see if there is a way to create summary data with
  > grouping columns so that summary data can be used with components
  > other
  > than AdvancedDataGrid (like graphics etc.). I have flat data (about 5 K lines
  > with
  > 20 columns) in an ArrayCollection collection and the need to cut about five data
  > differently for graphics.
  > I could manually do iteration in the collection (or get
  (> the datasets in BlazeDS service aggregated) but I was wondering if it
  > is a
  > existing function that can be used for grouping.
  > I don't know yet if it's a good to do all aggregation on the client
  > (i
  (> have a feeling that it will take too long)-I'd better get the
  > data aggregated from the server?

  You can use GroupingCollections as you want. I only did the summary lines,
  but check out this example:
  http://flexdiary.blogspot.com/2008/09/GroupingCollection-example-featuring.html

• Accessing the parent Collection

  Y at - it a Navto command or otherwise (yet) to return to a collection of parent?

  I am familiar with the go to URL command to access the home collection: goto://ApplicationViewState/library

  However, we would really like to be able to "get out" of an item to the collection parent without having to call the built upwards in the navigation bar.  Any help?

  Not yet, but it's on our list to address in the near future. We really want to get this in, as well as a way to link directly to the collections.

  Neil

• How to get the child elements of the ArrayCollection collection?

  Hi all

  I want to analyze collection ArrayCollection and want the child node element.

  How to parse the arraycollection collection?

  for (var i: int = 0; i<>

  {if (arrayCollectionObject.getItemAt (i). Item is "requireditem")}

  your code

  break;

  }

  }

  Let me know if it helps

• update of the arrayCollection collection

  Jin
  
  I have an arrayCollection collection each time it updates, I need to make some sort of a calculation, how can I do with mechanizm binding?
  
  Thank you
  Jean Michel

  There is an event collectionChange on the ArrayCollection collection that gets shot above power off when the ArrayCollection collection changes. You can capture this event and then sort the collection out of that.

  The reference of the language will give you a few details: http://livedocs.macromedia.com/flex/2/langref/index.html

  -Andy

• How to upgrade the ArrayCollection collection when running?

  Am facing a problem with the arraycollection collection...
  will have an arraycolelction like that...
  var dpHierarchy:ArrayCollection = new ArrayCollection([)
  {Region: "Application1"},
  {Region: "Demand2"},
  {Region: "Demand3"},
  [{Region: "APPROVISIONNEMENTS4"}]
  
  now what I'm looking for is... How to upgrade this arraycollection collection during execution using actions script?
  I need to update this collection table something like this...
  
  var dpHierarchy:ArrayCollection = new ArrayCollection([)
  {Region: "Application1", year: '2008'},
  {Region: "demand2', year: '2008'},
  {Region: "Demand3', year: '2008'},
  [{Region: "APPROVISIONNEMENTS4", year: '2008'}]
  
  How to add the year field in to existing collection arraycollection as shown in the example...
  
  Thanks in advance
  Pratap
  

  Hey get...

  I have to just give

  dpHierarchy [0] ['year'] = '2008 '.

  :-)

• Access the ArrayCollection class MXML ActionScript collection?

  I have a MXML file that has a collection for my tree component arraycollection. I am overriding the updateDisplayList function to add lines to all of my nodes in the tree... However, I can't seem to understand how to access this ArrayCollection collection of inside the actionscript class?
  
  I tried the methods used to pass variables between two MXML files (like a popup window - which I've used in the past and it works very well).
  
  My actionscript class code is almost identical to this example here:
  
  http://www.iepl.NET/treeControlSample/treeControlSample.html
  
  In the example above, the data is static, but sometimes my data's going to change and I need to access the set dataProvider (collection ArrayCollection) in order to make the lines work well... This has been very frustrating for me! :)
  
  If someone knows a better way to reach gettign lines for brothers and sisters in a tree... Please let me know!
  
  Any help would be super duper awesome!

  I found the solution to this. My problem was similar to cheftimo was seen in this post:

  http://www.Adobe.com/cfusion/webforums/Forum/MessageView.cfm?forumid=60&CATID=585&ThreadId = 1367784 & enterthread = y

  The answer is to import the component you are trying to access the variable from and then call using mx.core.Application ' Application.application.'

  Thanks to Greg Lafrance!

• To access the names of the fields in the ArrayCollection collection

  Hello, this can seem like a n00b question, but, I have a collection of table that looks to the below:

  public var topFive:ArrayCollection = new ArrayCollection([)
  {Month: "GAME_Redemptions"},
  {Month: "TALLINK_Redemptions"},
  {Month: "YvesRocher_Redemptions"},
  {Month: "ETAM_Redemptions"}
  ]);
  

  With a loop, for example, if I want to access the value, I would type, topFive [i] .month. However, if I want to access domain name, what would be the code. IM assuming that it would be something like [i] topFive - but it does not return the desired result.

  Does anyone know how to do this? I wanted to avoid having to put the table in a datagrid control and then extract values from there.

  Help, please!

  Craig

  Your ArrayCollection collection contains five dynamic objects. If the expression 'topFive [i]' will give you the object at index 'i', rather than the Month of this object property. If you do not know the names of the properties of these objects then you need in order to access their properties a second loop:

  
  <>
  "xmlns:MX ="http://www.adobe.com/2006/mxml"
  Layout = "vertical" >
     
     
          Import mx.collections.ArrayCollection;
             
  private var topFive:ArrayCollection = new ArrayCollection([)
  {Month: "GAME_Redemptions"},
  {Month: "TALLINK_Redemptions"},
  {Month: "YvesRocher_Redemptions"},
  {Month: "ETAM_Redemptions"}
  ]);
             
  private void doLoop(): void
  {

  Loop through the objects in the collection
  for each (var item: object in topFive)
  {

  Loop in the properties of the current object.
  for (var property: String in object)
  {

  Display the name of the current property and the value it contains
  output. Text += property + ":"+ object [property] + '\n'; '.
  }
  }
  }
             
  ]]>
     
     
      <>
  label = 'Do Loop'
  Click = "doLoop ()" / > "
         
      <>
  Width = "200".
  Height = "300".
  ID = "output" / >