将一维数组转换为二维“行”数组

Question

我需要在javascript中将一维数组更改为二维“行”数组：

var row1D = [“A”、“B”、“C”、“D”、“E”]；必须改为：

var row2D = [["A", "B", "C", "D", "E"]]; 我该如何解决这个问题？

（我将其更改为二维“列”数组的示例： var column2D = [["A"], ["B"], ["C"], ["D"], ["E"]] )

var column2D = [];

  for (var i = row1D.length; i--;) {

    column2D[i] = [row1D[i]];

  }

Answer 1

只需包装数组，而不是项目。column2D = [row1D];

Answer 2

使用map并包装数组中的每个元素var row1D = ["A", "B", "C", "D", "E"];var row2D = row1D.map(x => [x]);console.log(row2D);

Answer 3

将一维数组转换为二维“行”数组：谢谢！这就是我的解决方案！var row1D = ["A", "B", "C", "D", "E"];var row2D = [];  for (var i = row1D.length; i--;) {    row2D = [row1D];  }