对象的数组，需要合并它们

const arr = [{ name: 'Alice', age: 25 }, { name: 'Bob', gender: 'male' }];
const mergedObj = Object.assign({}, ...arr);

console.log(mergedObj);
// 输出：{ name: 'Bob', age: 25, gender: 'male' }

const arr = [{ name: 'Alice', hobbies: ['reading', 'painting'] }, { age: 25, hobbies: ['swimming'] }];
const mergedObj = arr.reduce((result, obj) => {
  for (const key in obj) {
    if (Array.isArray(obj[key])) {
      if (!Array.isArray(result[key])) {
        result[key] = [];
      }
      result[key] = result[key].concat(obj[key]);
    } else if (typeof obj[key] === 'object') {
      if (typeof result[key] !== 'object') {
        result[key] = {};
      }
      result[key] = { ...result[key], ...obj[key] };
    } else {
      result[key] = obj[key];
    }
  }
  return result;
}, {});

console.log(mergedObj);
// 输出：{ name: 'Alice', age: 25, hobbies: ['reading', 'painting', 'swimming'] }