删除js中矩阵和为零的列

const matrix = [
  [1, 2, 0, 4],
  [5, 6, 0, 8],
  [9, 10, 0, 12]
];

for (let col = 0; col < matrix[0].length; col++) {
  let sum = 0;
  for (let row = 0; row < matrix.length; row++) {
    sum += matrix[row][col];
  }
  if (sum !== 0) {
    // 如果该列的元素之和不为零，则将该列添加到结果数组中
    result.push(matrix.map(row => row[col]));
  }
}

const matrix = [
  [1, 2, 0, 4],
  [5, 6, 0, 8],
  [9, 10, 0, 12]
];

const result = [];

for (let col = 0; col < matrix[0].length; col++) {
  let sum = 0;
  for (let row = 0; row < matrix.length; row++) {
    sum += matrix[row][col];
  }
  if (sum !== 0) {
    result.push(matrix.map(row => row[col]));
  }
}

console.log(result);

[
  [1, 2, 4],
  [5, 6, 8],
  [9, 10, 12]
]