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)