如何在Typescript中声明一个给定大小的多维数组?

Question

我有以下内容…

export class Puzzle {
  pieces : Piece[];
  orderedPieces : Piece[][];
  constructor(width: number, height: number){
    this.height = height, this.width = width;
    let total : number = width * height;
    this.pieces = new Array<Piece>(total);
    this.orderedPieces = new Piece[height][width]; // Doesn't work what do I put here?
  }
  ...
}

如何在Typescript中声明这样的东西?

错误……

无法读取未定义属性'2'

Answer 1

没有办法(我知道)在一行javascript中实例化一个多维数组。你需要自己创建所有的数组，比如:

this.orderedPieces = new Array(this.height);
for (let i = 0; i < this.height; i++) {
    this.orderedPieces[i] = new Array(this.width);
}