Vue 및 Element-UI를 사용하여 데이터를 그룹화하고 요약하는 방법

npm install vue
npm install element-ui

const scores = [
  { name: '张三', subject: '数学', score: 90 },
  { name: '李四', subject: '语文', score: 85 },
  { name: '王五', subject: '数学', score: 95 },
  { name: '赵六', subject: '语文', score: 92 },
  { name: '小明', subject: '数学', score: 88 },
  { name: '小红', subject: '英语', score: 91 }
];

import { Table, TableColumn } from 'element-ui';

data() {
  return {
    scores: scores,
    columns: [
      { label: '姓名', prop: 'name' },
      { label: '科目', prop: 'subject' },
      { label: '分数', prop: 'score' }
    ],
    groupedScores: []
  };
},

mounted() {
  const groups = this.scores.reduce((acc, score) => {
    const group = acc.find(g => g.subject === score.subject);
    if (group) {
      group.scores.push(score);
    } else {
      acc.push({ subject: score.subject, scores: [score] });
    }
    return acc;
  }, []);
  this.groupedScores = groups;
},

<el-table :data="groupedScores">
  <el-table-column v-for="column in columns" :label="column.label" :key="column.prop">
    <template slot-scope="{ row }">
      {{ row[column.prop] }}
    </template>
  </el-table-column>
</el-table>

computed: {
  averageScore() {
    return this.groupedScores.map(group => {
      const scores = group.scores.map(score => score.score);
      const average = scores.reduce((sum, score) => sum + score, 0) / scores.length;
      return { subject: group.subject, average: average.toFixed(2) };
    });
  },
  maxScore() {
    return this.groupedScores.map(group => {
      const scores = group.scores.map(score => score.score);
      const max = Math.max(...scores);
      return { subject: group.subject, max: max };
    });
  }
},

<el-table :data="groupedScores">
  <el-table-column v-for="column in columns" :label="column.label" :key="column.prop">
    <template slot-scope="{ row }">
      {{ row[column.prop] }}
    </template>
  </el-table-column>
  <el-table-column label="平均分">
    <template slot-scope="{ row }">
      {{ averageScore.find(s => s.subject === row.subject).average }}
    </template>
  </el-table-column>
  <el-table-column label="最高分">
    <template slot-scope="{ row }">
      {{ maxScore.find(s => s.subject === row.subject).max }}
    </template>
  </el-table-column>
</el-table>