Question

我下面有两个JSON数组对象。我想得到stdcontinfo JSON值的匹配stdname并将其添加到stdJson各自的JSON中。

有人可以帮我解决这个问题吗？

var stdJson = [{
        "_id": ObjectId("5923ed1f610be38692e88e4d"),
        "stdname": "Bala",
        "fathername": "Kannappan",
        "mark1": 78.0,
        "mark2": 70.0,
        "mark3": 98.0,
        "mark4": 88.0,
        "mark5": 100.0
    },
    {
        "_id": ObjectId("5923ed99610be38692e88e4e"),
        "stdname": "vetri",
        "fathername": "R",
        "mark1": 38.0,
        "mark2": 40.0,
        "mark3": 48.0,
        "mark4": 28.0,
        "mark5": 50.0
    },
    {
        "_id": ObjectId("5923edf6610be38692e88e4f"),
        "stdname": "kumba",
        "fathername": "K",
        "mark1": 68.0,
        "mark2": 60.0,
        "mark3": 68.0,
        "mark4": 88.0,
        "mark5": 35.0
    },
    {
        "_id": ObjectId("5923ee1a610be38692e88e50"),
        "stdname": "Jagadesh",
        "fathername": "P",
        "mark1": 100.0,
        "mark2": 90.0,
        "mark3": 89.0,
        "mark4": 100.0,
        "mark5": 95.0
    }, {
        "_id": ObjectId("5923ee6b610be38692e88e51"),
        "stdname": "Dayakar",
        "fathername": "R",
        "mark1": 70.0,
        "mark2": 80.0,
        "mark3": 69.0,
        "mark4": 60.0,
        "mark5": 55.0
    }
]

var stdcontinfo = [{
        "_id": ObjectId("592437891a87641edc58547e"),
        "stdname": "dev1",
        "email": "dev1@gmail.com",
        "phnum": 6545645645.0,
        "__v": 0
    },
    {
        "_id": ObjectId("5924ffe6837e5d2224f42e00"),
        "stdname": "Bala",
        "email": "Bala@gmail.com",
        "phnum": 9965148632.0,
        "__v": 0
    },
    {
        "_id": ObjectId("592500371e469423a4f65306"),
        "stdname": "kumba",
        "email": "kumba@gmail.com",
        "phnum": 9962651490.0,
        "__v": 0
    },
    {
        "_id": ObjectId("59250085f02d4c0face17820"),
        "stdname": "vetri",
        "email": "vetri@gmail.com",
        "phnum": 9962651490.0,
        "__v": 0
    },
    {
        "_id": ObjectId("592500c6c6a6af1d6c7c3fa5"),
        "stdname": "Jagadesh",
        "email": "Jagadesh@gmail.com",
        "phnum": 1234567890,
        "__v": 0
    }
]

Answer 1

我认为你不需要Lodash，只需使用简单的JS：

stdJson.forEach(itemA=>{
    let resItem = stdcontinfo.find(itemB=>itemA.stdname === itemB.stdname);
    if(resItem){
        itemA.email = resItem.email;
        itemA.phnum = resItem.phnum;
    }
});

Answer 2

使用lodash，您可以使用其中一个交叉函数。没有经过测试，但会是这样的：

var arrayOfSameObjects = _.intersectionBy(stdcontinfo, stdJson, 'stdname');

找到相同的对象后，您可以将其添加到stdJson：

var stdJson = stdJson.concat(arrayOfSameObjects);

参考文献：

https://lodash.com/docs/#intersectionBy

https://lodash.com/docs/#intersectionWith

如何使用Lodash从两个不同的数组中获得相等的值

2 个答案: