生成具有随机值 TypeScript 的二维数组

Question

我尝试在打字稿上生成二维数值数组初始化：

weight: number[][] = [];

和生成值：

private generateWeights(): void {
    this.weight = [];
    for (let i = 0; i < 7; i++) {
      this.weight[i] = [];
      for (let j = 0; j < 5; j++) {
        this.weight[i][j] = Math.random() * 2;
      }
    }
    console.log('this.weight: ', this.weight);
  }

但是在控制台上我得到了一些静态值，例如图片：

当我尝试打印二维数组的行时，我感到很奇怪 console.log:

Answer 1

我将 a playground 与一种您可以使用的方法放在一起，这种方法至少在运行单独使用时效果很好。很抱歉，不知道您的其余代码是什么样子，因此不容易看出您遇到问题的原因。

function generateWeights(rows: number, cols: number): number[][] {
  return Array.from({ length: rows }).map(() =>
    Array.from({ length: cols }).map(() => Math.random() * 2)
  );
}

//example invocation
console.log(JSON.stringify(generateWeights(7, 5), null, "  "));

示例调用产生...

[
  [
    1.9665769596410398,
    0.32225623317750873,
    1.979382321105576,
    1.3400841950364906,
    0.0333557898363388
  ],
  [
    0.523308974899896,
    0.519975189295653,
    0.14464403965018624,
    0.7799904829432234,
    0.7748489552011621
  ],
  [
    1.2637757372417209,
    0.9375011277636429,
    0.46157500412620367,
    0.7470383909903693,
    0.45140251266154596
  ],
  [
    0.9576573640144601,
    0.7096653222305775,
    1.7104635189269257,
    0.16415705266079472,
    0.38377189535968403
  ],
  [
    0.04732945754404572,
    0.7050064626827024,
    0.8450634927445284,
    0.12460094121473508,
    0.6501398542245567
  ],
  [
    0.5087564269629801,
    0.8193243695084456,
    1.4786471319572896,
    0.35962390487698004,
    1.5651415242853055
  ],
  [
    0.31416888386760533,
    1.088122706073758,
    0.9604222417055066,
    0.6956030508790003,
    1.6623759187576028
  ]
]

生成具有随机值 TypeScript 的二维数组

generate 2d array with random values TypeScript

javascript

arrays

typescript

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