Actionscript 3 数组范围/多维数组问题

Question

我似乎遇到了数组范围问题。我有一个全局变量；

var itemConnect:Array = new Array();

在开始时初始化。然后我有一个函数可以将其填充为二维数组：

// Draw connections
function initConnections() {
 for (var i:Number = 0; i < anotherArray.length; i++) {
  for (var j:Number = 0; j < anotherArray[i].length; j++) {
   itemConnect[i] = new Array();
   itemConnect[i][j] = new Shape();
  }
 }
}

数据结构类似于：

CREATE: i = 0, j = 1, val = [object Shape]
CREATE: i = 0, j = 14, val = [object Shape]
CREATE: i = 1, j = 2, val = [object Shape]
CREATE: i = 1, j = 3, val = [object Shape]
CREATE: i = 1, j = 4, val = [object Shape]
CREATE: i = 1, j = 5, val = [object Shape]
CREATE: i = 1, j = 6, val = [object Shape]
...

如果我尝试在另一个函数中访问这个数组，我会得到这个：

i = 0, j = 14, val = [object Shape]
i = 1, j = 51, val = [object Shape]
TypeError: Error #1010: A term is undefined and has no properties.
 at main_fla::MainTimeline/mouseDownHandler()

我尝试在开始时将数组初始化为二维数组，如下所示：

var itemConnect:Array = new Array();
for (var counti = 0; counti < anotherArray.length; counti++) {
 itemConnect[counti] = new Array();
}

产生稍微好一点的结果，但仍然遗漏了许多节点：

i = 0, j = 14, val = [object Shape]
i = 1, j = 51, val = [object Shape]
i = 3, j = 47, val = [object Shape]
i = 6, j = 42, val = [object Shape]
i = 7, j = 42, val = [object Shape]
i = 8, j = 45, val = [object Shape]
i = 9, j = 42, val = [object Shape]
...

似乎只能访问每个 [i] 节点中的一个，因此缺少 [1][2]、[1][3]、[1][4] - 只有最后一个 [j ] 元素出现。

这样做的正确方法是什么？我也不知道一开始数组的确切大小，这可能是个问题。

谢谢

Answer 1

你的嵌套循环不是看起来更像这样吗？

function initConnections() {
    for (var i:Number = 0; i < anotherArray.length; i++) {
        itemConnect[i] = new Array();
        for (var j:Number = 0; j < anotherArray[i].length; j++) {
            itemConnect[i][j] = new Shape();
        }
    }
}

请注意，在这个版本中，内部数组的构造发生在循环之外，这意味着要对其进行迭代。