javascript - Google App 脚本数组

Question

我正在研究 Google 脚本，并且正在测试创建二维数组的不同方法。 我创建了一个像这样的数组:

  var codes = new Array(6);
  for (var i = 0; i < 6; i++) {
  codes[i] = new Array(4);
  }
  codes[0][0]="x"; 
  codes[0][1]="x"; 
  codes[0][2]="x"; 
  codes[0][3]="x";
  codes[1][0]="x";
  codes[1][1]="x";
  codes[1][2]="x"; 
  codes[1][3]="x";
  codes[2][0]="x";
  codes[2][1]="x";
  codes[2][2]="x";
  codes[2][3]="x";
  codes[3][0]="x";
  codes[3][1]="x";
  codes[3][2]="x";
  codes[3][3]="x";
  codes[4][0]="x";
  codes[4][1]="x";
  codes[4][2]="x";
  codes[4][3]="x";
  codes[5][0]="x";
  codes[5][1]="x";
  codes[5][2]="x";
  codes[5][3]="x";

并且运行良好。

我阅读了以下链接 here , here和 here 。

但是当我这样做时:

var codes = new Array(6);
  for (var i = 0; i < 6; i++) {
  codes[i] = new Array(4);
  }
codes[0]=["x","x","x","x"];
codes[1]=["x","x","x","x"];
codes[2]=["x","x","x","x"];
codes[3]=["x","x","x","x"];
codes[4]=["x","x","x","x"];
codes[5]=["x","x","x","x"];

它不起作用，所以我尝试了这样的:

var codes = new Array([["x","x","x","x"],["x","x","x","x"],["x","x","x","x"],["x","x","x","x"],["x","x","x","x"],["x","x","x","x"]]);

它也不起作用。

当代码不起作用时，我不会收到错误，只是不显示值。

我做错了什么？它看起来是相同的代码，并且许多文档中都推荐了两种不起作用的方法。

Answer 1

W3schools表示不需要使用new Array()。 为了简单性、可读性和执行速度，使用文字方法例如:

var Animals = ["猫", "兔子"];

您的代码不起作用的原因是您在循环内等于codes，并且在循环范围结束后“codes”仅获取最后一个设置的数组。相反，您应该将这些数组推送到代码。

var codes = [];
for (var i = 0; i < 6; i++) {
  codes.push([i]);
}
console.log(codes)
codes[0]=["x","x","x","x"];
codes[1]=["x","x","x","x"];
codes[2]=["x","x","x","x"];
codes[3]=["x","x","x","x"];
codes[4]=["x","x","x","x"];
codes[5]=["x","x","x","x"];