You can use a plain Object as a Set... see the code below. You first put key/value pairs into the Object, but it makes no difference what the values are. You just care about the keys, and the Object's hash table takes care of ensuring that setting a key more than once is harmless.
Then you iterate over the Object, pulling out the unique keys into an Array that can be sorted. Finally, you stick "All" at the top, after the sort. - Gordon <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; width="600" height="600"> <mx:Script> <![CDATA[ [Bindable] private var array:Array = [ "B", "C", "A", "B", "A", "D" ]; public function getUniqueItems(array:Array):Array { var uniqueItemHash:Object = {}; var n:int = array.length; for (var i:int = 0; i < n; i++) { uniqueItemHash[array[i]] = true; } var uniqueItemArray:Array = []; for (var p:String in uniqueItemHash) { uniqueItemArray.push(p); } uniqueItemArray.sort(); uniqueItemArray.unshift("All"); return uniqueItemArray; } ]]> </mx:Script> <mx:ComboBox dataProvider="{getUniqueItems(array)}"/> </mx:Application> -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Doug Lowder Sent: Tuesday, April 11, 2006 5:00 PM To: [email protected] Subject: [flexcoders] Re: AS3 Array Question For large arrays, it will be more efficient to do this: 1) Make a copy of the input array, if necessary 2) Sort the array by status 3) Iterate through the array once, storing new status values and skipping the duplicates --- In [email protected], "turbo_vb" <[EMAIL PROTECTED]> wrote: > > I'm trying to populate a dataProvider array for a comboBox that > contains unique status values from another array, that is used as > the dataProvider for a dataGrid. The comboBox is used to filter the > dataGrid. The code below works, but I seem to remember seeing this > done somewhere that doesn't use nested for statements. Does anyone > know how I can identify if the array's status value already exists > in the new status array without iterating the new array every time? > > public function populateStatusArray(array:Array):void { > > var status : Array = new Array; > status.push("All"); > > var n:int = citations.length; > for (var i:int = 0; i < n; i++) { > var m:int = status.length; > var found:Boolean = false; > for (var j:int = 0; j < m; j++) { > if (status[j] == array[i].status){ > found = true; > } > } > if (found == false) { > status.push(array[i].status); > } > } > status.sort(); > ModelLocator.getInstance().statusArray = status; > } > > Thank You, > Tim Hoff > -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
