package{
import flash.display.Sprite;
public class Main extends Sprite{
public function Main(){
var x:Array = [1, 2, 3];
var y:Array = [[5, 6], [7, 8]];
var z:Array = x.concat(y); // Result is [1, 2, 3, [5, 6], [7, 8]].
trace(z); //1,2,3,5,6,7,8
}
}
}