将的键更改为二维数组

function convertTo2DArray(arr, rows, cols) {
  if (arr.length !== rows * cols) {
    throw new Error('数组长度与指定的行数和列数不匹配');
  }

  let result = [];
  for (let i = 0; i < rows; i++) {
    let row = [];
    for (let j = 0; j < cols; j++) {
      row.push(arr[i * cols + j]);
    }
    result.push(row);
  }

  return result;
}

// 示例
let oneDimensionalArray = [1, 2, 3, 4, 5, 6];
let rows = 2;
let cols = 3;

let twoDimensionalArray = convertTo2DArray(oneDimensionalArray, rows, cols);
console.log(twoDimensionalArray); // 输出: [[1, 2, 3], [4, 5, 6]]