数组对象

const a=[{uid: 1,name: '黄鹤楼'},{uid: 2,name: '鹳雀楼'},{uid: 3,name: '岳阳楼'},{uid: 4,name: '滕王阁'}]const b=[{uid: 1,address: '湖北武汉黄鹤楼'},{uid: 2,address: '山西运城鹳雀楼'},{uid: 3,address: '湖南岳阳岳阳楼'},{uid: 4,address: '江西南昌滕王阁'}]// 期待的效果const c=[{uid: 1,name: '黄鹤楼',address: '湖北武汉黄鹤楼',},{uid: 2,name: '鹳雀楼',address: '山西运城鹳雀楼',},{uid: 2,name: '岳阳楼',address: '湖南岳阳岳阳楼',},{uid: 2,name: '滕王阁',address: '江西南昌滕王阁',}]

合并方法

a.map(el => {el.address = b.find(item => item.uid == el.uid).address})
console.log("变更后a:",a)