通过两个键对对象数组进行排序和分组，并使用新键创建分组项的数组

// 假设原始对象数组为data
const data = [
  { name: 'John', category: 'A', value: 10 },
  { name: 'Jane', category: 'B', value: 20 },
  { name: 'Alice', category: 'A', value: 30 },
  { name: 'Bob', category: 'C', value: 40 },
  { name: 'Eve', category: 'B', value: 50 }
];

// 第一个键为category，第二个键为name
const key1 = 'category';
const key2 = 'name';

// 按照第一个键进行排序
data.sort((a, b) => a[key1].localeCompare(b[key1]));

// 使用reduce方法进行分组
const groupedData = data.reduce((accumulator, current) => {
  const groupKey = current[key2];
  if (!accumulator[groupKey]) {
    accumulator[groupKey] = [];
  }
  accumulator[groupKey].push(current);
  return accumulator;
}, {});

// 将分组结果转换为数组
const result = Object.entries(groupedData).map(([key, value]) => ({
  [key2]: key,
  items: value
}));

console.log(result);

[
  {
    "name": "John",
    "items": [
      {
        "name": "John",
        "category": "A",
        "value": 10
      }
    ]
  },
  {
    "name": "Alice",
    "items": [
      {
        "name": "Alice",
        "category": "A",
        "value": 30
      }
    ]
  },
  {
    "name": "Jane",
    "items": [
      {
        "name": "Jane",
        "category": "B",
        "value": 20
      }
    ]
  },
  {
    "name": "Eve",
    "items": [
      {
        "name": "Eve",
        "category": "B",
        "value": 50
      }
    ]
  },
  {
    "name": "Bob",
    "items": [
      {
        "name": "Bob",
        "category": "C",
        "value": 40
      }
    ]
  }
]