生成带有随机值的二维数组 TypeScript

编程问答 2022-05-15

问题描述

我尝试在打字稿上生成二维数值数组 初始化：

weight: number[][] = [];

和世代价值：

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);
  }

但在控制台上我得到一些静态值，如图片：

enter image description here

当我尝试打印二维数组的行时，我得到了奇怪的 console.log：

enter image description here

解决方法

我将 a playground 与一种您可以使用的方法结合在一起，至少在单独运行时效果很好。抱歉，不知道您的代码的其余部分是什么样子的，因此很难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
  ]
]
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