Array Flash ActionScript

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function functionName(element:*, index:int, array:Array):void
package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var subjects:Array = ["Art", "Science", "Math", "History"];
        subjects.forEach(traceArray);
    }
    function traceArray(element:*, index:int, a:Array):void {
        trace("["+ index + "] = "+ element);
    }
  }
}