lodash -如果所有值都为空，则从数据表(2D矩阵)中删除列

const _ = require('lodash');

function removeEmptyColumnsFromTable(table) {
  const rows = table.length;
  const cols = table[0].length;
  
  const emptyColumns = [];
  for (let col = 0; col < cols; col++) {
    const columnValues = _.compact(table.map(row => row[col]));
    if (_.isEmpty(columnValues)) {
      emptyColumns.push(col);
    }
  }
  
  emptyColumns.reverse().forEach(col => {
    table.forEach(row => row.splice(col, 1));
  });

  return table;
}

// 示例数据表
const table = [
  [1, null, 3, '', 5],
  [null, null, null, null, null],
  [null, 2, null, 4, null],
  ['', null, '', null, '']
];

const updatedTable = removeEmptyColumnsFromTable(table);
console.log(updatedTable);