如何在 Typescript 中声明给定大小的多维数组

Question

我有以下...

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 中声明这样的内容？

错误是...

无法读取未定义的属性“2”

Answer 1

没有办法（据我所知）在一行中用 javascript 实例化一个多维数组。 您必须自己实际创建所有数组，例如：

this.orderedPieces = new Array(this.height);

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