よく忘れるのでメモ
OK
private var stringAry:String[] = ["a", "b", "c"];
これはダメ
private var stringAry:String[10] = ["a", "b", "c"];
これはダメ
private var stringAry:String[] = new String["a", "b", "c"];
C#っぽくこんなのもできるっぽい
URL:http://www.flashdevelop.org/community/viewtopic.php?f=5&t=9534&start=15
var a: int[,] = new int[100,100]; a[10, 10] = 2;
→100x100で初期化して[10][10]に2を入れてる