Add a line of DataGrid using the ArrayCollection collection

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• 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;

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  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

• Flex 3: syntax to power the ArrayCollection collection in loop

  Hi, I'm a newb. I can't find an example how to do that. Examples would be greatl appreciated.

  I want to draw some technical data by filling the dataprovider for my chart with a collection of table (so far no problem). I want to poulate collection table by looping through a mathematical expression, and I can't understand the syntax for this. For example...

  [Bindable]
  private var myChartData:ArrayCollection = new ArrayCollection([)
  {vertNum:100, horizNum:100}
  ]);

  I want to browse and add more points by program, so if I loop 5 times I find myself with...

  [Bindable]
  private var myChartData:ArrayCollection = new ArrayCollection([)
  {vertNum:100, horizNum:100},

  {vertNum:110, horizNum:110},

  {vertNum:43, horizNum:120},

  {vertNum:88, horizNum:130},

  {vertNum:140, horizNum:140},

  etc...
  ]);

  The number of variables horizontal to draw ould be several hundred, so I don't want to set up a huge collection of static array with expressions in each location. I'd rather solve the expression as a loop iterates and populate the collection of table as he goes. But I don't have any idea how "word" which.

  Thank you!

  Here's an example of adding a simple formula data points using a random number generator and amplify the randomness. The process is just to create a new object for each iteration of the loop and add the object to your ArrayCollection collection. You can assign as many properties to the object you need, which can be useful to use an ArrayCollection collection that appears in several charts.

  
  http://www.Adobe.com/2006/mxml"layout ="absolute"creationComplete =" build_model () ">"
     
          Import mx.collections.ArrayCollection;
             
  private function build_model (): void {}
  var obj:Object;
  var chartAC:ArrayCollection = new ArrayCollection();
                 
  for (var i: uint = 0; i< 100;="" i++)="">
  obj = new Object();
  obj.horizNum = 100 + 10 * i;
  obj.vertNum = i * Math.Random ();
  chartAC.addItem (obj);
  }
  linechart1. DataProvider = chartAC;
  }

  ]]>
     
     
         
             
         
     
     
  

  Chris

• 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 '.

  :-)

• 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

• Hello, we have a company agreement and we are entittled to use the master collection package. Based on thi

  Hello

  We have business agreement and we are entittled to use the master collection package. Based on this, we want to upgrade Flash builder 4.7. Please let us know how can we do it and how to get the keys.

  -Med

  @Anamika018: please contact Adobe volume licensing representative technical support to access Fb 4.7 under a volume license business - they'll be able to give the right for the product.

• 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)

  }

  }

  }

• 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

• 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

• 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

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