如何在打字稿中定义数组中的对象数组

Question

So if you want to define a array of objects you would do this: 因此，如果要定义对象数组，可以这样做：

public racks: Rack[];

However, I want to able to make an array that takes in more arrays of racks so for example, 但是，我希望能够制作一个可以容纳更多机架的阵列，例如，

[ 
  [rack1, rack2, rack3], 
  [rack4, rack5, rack6], 
  [rack7] 
]

My question is how do I define it so it can accept this kind of variable? 我的问题是如何定义它以便它可以接受这种变量？

Answer 1

you're looking for: 您正在寻找：

public racks: Array<Array<Rack>>;

or less verbose: 或更详细：

public racks: Rack[][];

Answer 2

您可以定义一个由Rack组成的数组：

public racks: Rack[][];