VueJS:材料表:如何将行中的值指定为列标题？

<template>
  <div>
    <table>
      <thead>
        <tr>
          <th v-for="column in columns" :key="column">{{ column }}</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="row in rows" :key="row.id">
          <td v-for="column in columns" :key="column">{{ row[column] }}</td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rows: [
        { id: 1, name: 'John', age: 25 },
        { id: 2, name: 'Jane', age: 30 },
        { id: 3, name: 'Bob', age: 35 }
      ]
    };
  },
  computed: {
    columns() {
      const columns = new Set();
      this.rows.forEach(row => {
        Object.keys(row).forEach(key => {
          columns.add(key);
        });
      });
      return Array.from(columns);
    }
  }
};
</script>