actionscript 3 and JSON

Question

Hi,

I've been trying to get JSON working with AS3 for a while now, but to no avail. I keep getting the following error when I get the JSON back:

TypeError: Error #1034: Type Coercion failed: cannot convert Object@26331c41 to Array.

I've tried changing the datatype of the variable "jsonData" to object, which fixes the error, but I'm not entirely sure how I can parse the data.

package 
{
    import flash.display.Sprite;
    import flash.net.URLRequest;
    import flash.net.URLLoader;
    import flash.events.*;
    import com.adobe.serialization.json.JSON; 

    public class DataGrab extends Sprite {

     public function DataGrab() {

     }

     public function init(resource:String):void {
      var loader:URLLoader = new URLLoader();
      var request:URLRequest = new URLRequest(resource);
      loader.addEventListener(Event.COMPLETE, onComplete);
      loader.load(request);
     } 

     private function onComplete(e:Event):void {
      var loader:URLLoader = URLLoader(e.target);
      var jsonData:Array = JSON.decode(loader.data);
      trace(jsonData);
     }


    }
}

Answer 1

You were correct when you had the jsonData variable as an Object. To iterate through all the properties of that variable you could just do something like this:

var jsonData:Object = JSON.decode(loader.data);
for (var i:String in jsonData)
{
    trace(i + ": " + jsonData[i]);
}

If you wanted to check if the object contained a specific property you could use something like:

var hasFooProperty:Boolean = jsonData.hasOwnProperty("fooProperty");