javascript - 如何在 ES6 类构造函数中创建和填充二维数组

Question

我想初始化并填充一个二维数组，但我的解决方案似乎不起作用。它只返回一个函数，而不是一个值。

class Board{
    constructor(width,height,cols,rows)
    {
        this.width=width;
        this.height=height;
        this.cols=cols;
        this.rows=rows;
        this.array= function(){
            let array=[];
            for(let i=0;i<this.cols;i++)
            {
                array[i]=[];
                for(let j=0;j<this.rows;j++){
                    array[i][j]=0;
                }
            }
            return array;
        }
    }

Answer 1

不需要内部函数，只需填充数组并将其分配给属性即可。

class Board {
  constructor(width, height, cols, rows) {
    this.width = width;
    this.height = height;
    this.cols = cols;
    this.rows = rows;
    let array = [];
    for (let i = 0; i < this.cols; i++) {
      array[i] = [];
      for (let j = 0; j < this.rows; j++) {
        array[i][j] = 0;
      }
    }
    this.array = array;
  }
}

const b = new Board(2, 3, 4, 5);
console.log(b.array);