SOURCE

let listA = [
        {
            "activityCenterUrl": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/2933c696260e57505f76b39949c93cea.png",
            "coverChart": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/15737ffb1f4466c0196c07227eef82f6.png",
            "createtime": 1627464437000,
            "endTime": 1630252800000,
            "userId": 609,
            "name": "011",
            "startTime": 1629216000000,
        },
        {
            "activityCenterUrl": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/2933c696260e57505f76b39949c93cea.png",
            "coverChart": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/15737ffb1f4466c0196c07227eef82f6.png",
            "createtime": 1627464437000,
            "endTime": 1630252800000,
            "userId": 610,
            "name": "022",
            "startTime": 1629216000000,
        },
        {
            "activityCenterUrl": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/2933c696260e57505f76b39949c93cea.png",
            "coverChart": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/15737ffb1f4466c0196c07227eef82f6.png",
            "createtime": 1627464437000,
            "endTime": 1630252800000,
            "userId": 611,
            "name": "0333",
            "startTime": 1629216000000,
        },
]

let listB = [
    {
        "userId": 609,
        "goodsList": [
            {
                "goodsId": 14992,
                "goodsPrice": 18383,
                "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/05/13/21051311081811ea7b3aea0e4b2b.jpg",
                "goodsTitle": "哈哈哈哈哈家",
                "priority": 1,
                "userId": 5016095
            },
            {
                "goodsId": 14949,
                "goodsPrice": 88888,
                "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/03/19/2103191531419bcf4cae1a01492a.jpg",
                "goodsTitle": "疑是地上霜",
                "userId": 5016095
            },
            {
                "goodsId": 14991,
                "goodsPrice": 88888,
                "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/05/13/210513110731d455ead354714f8a.jpg",
                "goodsTitle": "鱼游濠上好多好多话亟待解决的家",
                "userId": 5016095
            }
        ]
    },
    {
        "userId": 610,
        "goodsList": [
            {
                "goodsId": 14951,
                "goodsPrice": 50,
                "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/03/20/210320112817b3022efd4f7141fd.jpeg",
                "goodsTitle": "The",
                "priority": 1,
                "userId": 707355980
            }
        ]
    },
    {
        "userId": 611,
        "goodsList": [
            {
                "goodsId": 16103,
                "goodsPrice": 1997,
                "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/05/17/210517160445794576b7e3ed48ce.jpeg",
                "goodsTitle": "444",
                "priority": 1,
                "userId": 7833518
            },
            {
                "goodsId": 16104,
                "goodsPrice": 0.1,
                "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/05/17/210517160518f2a46297692c4f55.jpeg",
                "goodsTitle": "5555",
                "priority": 2,
                "userId": 7833518
            },
            {
                "goodsId": 16105,
                "goodsPrice": 673,
                "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/05/17/21051716055471893b485b6a4f0c.jpeg",
                "goodsTitle": "666",
                "priority": 3,
                "userId": 7833518
            }
        ]
    }
]

/***
 * 写个function
 * 实现将两个数组对象中userId为同一个的，拼接成一个大的数组。
 * 期望如：
 * newList[
 *  {
 *          "activityCenterUrl": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/2933c696260e57505f76b39949c93cea.png",
            "coverChart": "http://chuangshicdn.file.m.mvbox.cn/upload/ga/image/15737ffb1f4466c0196c07227eef82f6.png",
            "createtime": 1627464437000,
            "endTime": 1630252800000,
            "userId": 609,
            "name": "011",
            "startTime": 1629216000000,
            "goodsList": [
                {
                    "goodsId": 14992,
                    "goodsPrice": 18383,
                    "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/05/13/21051311081811ea7b3aea0e4b2b.jpg",
                    "goodsTitle": "哈哈哈哈哈家",
                    "priority": 1,
                    "userId": 5016095
                },
                {
                    "goodsId": 14949,
                    "goodsPrice": 88888,
                    "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/03/19/2103191531419bcf4cae1a01492a.jpg",
                    "goodsTitle": "疑是地上霜",
                    "userId": 5016095
                },
                {
                    "goodsId": 14991,
                    "goodsPrice": 88888,
                    "goodsPic": "http://file.m.mvbox.cn/upload/mobile/familyMatch/21/05/13/210513110731d455ead354714f8a.jpg",
                    "goodsTitle": "鱼游濠上好多好多话亟待解决的家",
                    "userId": 5016095
                }
            ]
 *      }
 * ]
*/ 
function linkArrs() {
    let obj = listA.map((item,index) => {
        return {...item, ...listB[index]};
    });
    console.log(obj)
}
linkArrs();