package{ import flash.display.Sprite; public class Main extends Sprite{ public function Main(){ var numbers:Array = new Array(4, 10); numbers[4] = 1; trace(numbers); for(var i:int = 0; i < numbers.length; i++) { if(numbers[i] == undefined) { numbers.splice(i, 1); i--; } } trace(numbers); } } } // 4,10,,,1 // 4,10,1