我如何减少这个数组，使每个数组中的对象合并为javascript，但不知道键值名称

const arr = [
  { name: 'Alice', age: 25 },
  { city: 'New York', country: 'USA' },
  { hobby: 'reading', skill: 'programming' }
];

const mergedObj = arr.reduce((result, obj) => {
  return Object.assign(result, obj);
}, {});

console.log(mergedObj);

{
  name: 'Alice',
  age: 25,
  city: 'New York',
  country: 'USA',
  hobby: 'reading',
  skill: 'programming'
}