Build Expression from data bind in Model

          
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Model id="myModel">
    <myModel>
      <d>{(isMale.selected) ? "Mr." : "Ms."}</d>
    </myModel>
  </mx:Model>
  <mx:Form>
    <mx:FormItem label="Select sex:">
      <mx:RadioButton id="isMale" label="Male" groupName="gender" selected="true" />
      <mx:RadioButton id="isFemale" label="Female" groupName="gender" />
    </mx:FormItem>
  </mx:Form>
  <mx:Text text="{'Conditional: '+myModel.d}" />
</mx:Application>

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Build Expression from data bind in Model : Model « Data Model « Flex

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