数据例子：

const arr1 = [
  { id: 1, name: 'John' },
  { id: 2, name: 'Alice' },
  { id: 3, name: 'Bob' }
];

const arr2 = [
  { id: 2, age: 30 },
  { id: 3, age: 25 },
  { id: 4, age: 28 }
];

代码：

const mergedArray = arr1.map((item) => {
  const matchedObject = arr2.find((obj) => obj.id === item.id);
  return { ...item, ...matchedObject };
});

console.log(mergedArray);