按多个属性对js对象进行分组

// 假设有一个包含多个对象的数组
const objects = [
  { name: 'Alice', age: 25, gender: 'female' },
  { name: 'Bob', age: 30, gender: 'male' },
  { name: 'Charlie', age: 25, gender: 'male' },
  { name: 'Diana', age: 30, gender: 'female' }
];

// 定义一个函数，用于按指定属性对对象进行分组
function groupBy(objects, ...props) {
  return objects.reduce((result, obj) => {
    const key = props.map(prop => obj[prop]).join('-');
    if (!result[key]) {
      result[key] = [];
    }
    result[key].push(obj);
    return result;
  }, {});
}

// 按年龄和性别对对象进行分组
const groupedObjects = groupBy(objects, 'age', 'gender');

// 打印分组结果
console.log(groupedObjects);

{
  '25-female': [
    { name: 'Alice', age: 25, gender: 'female' }
  ],
  '30-male': [
    { name: 'Bob', age: 30, gender: 'male' }
  ],
  '25-male': [
    { name: 'Charlie', age: 25, gender: 'male' }
  ],
  '30-female': [
    { name: 'Diana', age: 30, gender: 'female' }
  ]
}