javascript - 当两个不同对象的两个值匹配时，向对象添加新的键/对

Question

我已经映射并过滤了两个对象。我的想法碰壁了。当值匹配时，我看不到如何将一个对象的键/值添加到另一个对象。

这种类型对我来说相当新鲜，并且耗尽了我的逻辑思维，因此任何帮助将不胜感激。

我想将“lat”和“lon”值以及“todaysDataPostcode”对象中的键添加到“data”对象中。

这应该在邮政编码匹配时完成。

我正在使用以前做过的方法，但最后阶段是不同的，而且事实证明很难弄清楚

代码如下:

addLatLon = (location, latLon) => {
        return location.map(compiledDataObj => {
            const objectsWithSameLocation = latLon.filter(dataObj => {
                return dataObj.postcode === compiledDataObj.postcode;
            });

            objectsWithSameLocation.map(obj => {
                //here we want to match the postcode of the object we're running through
                // so its like
            compiledDataObj.postcode[obj.postcode]

                // return console.log('location.postcode', location.map(i => i.postcode), 'obj.postcode', obj.postcode)
            });
        });
    };

这是 2 个数据集。第一个只是部分版本，因为这足以实现逻辑。

下面是:“数据”

[
    {
        "location": "City of London",
        "postcode": "EC1A 7BE",
        "year": {
            "10": "464436",
            "11": "442413",
            "12": "525723",
            "13": "465451",
            "14": "625001",
            "15": "783667",
            "16": "736788",
            "17": "820305",
            "18": "802129",
            "19": "864034",
            "95": "91449",
            "96": "108999",
            "97": "116343",
            "98": "124382",
            "99": "149143",
            "00": "173738",
            "01": "284262",
            "02": "344239",
            "03": "261645",
            "04": "326913",
            "05": "330363",
            "06": "316121",
            "07": "360923",
            "08": "471861",
            "09": "400317"
        }
    },
    {
        "location": "Barking & Dagenham",
        "postcode": "RM9 4TP",
        "year": {
            "10": "162905",
            "11": "163821",
            "12": "163899",
            "13": "167919",
            "14": "184884",
            "15": "220070",
            "16": "258758",
            "17": "282441",
            "18": "291548",
            "19": "298333",
            "95": "50460",
            "96": "50828",
            "97": "54459",
            "98": "57559",
            "99": "64532",
            "00": "71079",
            "01": "82343",
            "02": "98713",
            "03": "134750",
            "04": "150115",
            "05": "164484",
            "06": "162340",
            "07": "176577",
            "08": "194235",
            "09": "166798"
        }
    }]

这是第二个数据集:“todaysDataPostcode”

 [{
        "postcode": "EC1A 7BE",
        "longitude": -0.100404,
        "latitude": 51.51775
    },
    {
        "postcode": "RM9 4TP",
        "longitude": 0.127884,
        "latitude": 51.539774
    },
    {
        "postcode": "EN5 5RP",
        "longitude": -0.194074,
        "latitude": 51.65044
    },
    {
        "postcode": "DA16 3DN",
        "longitude": 0.102535,
        "latitude": 51.464737
    },
    {
        "postcode": "HA9 9AA",
        "longitude": -0.279243,
        "latitude": 51.563322
    },
    {
        "postcode": "BR1 3NN",
        "longitude": 0.017131,
        "latitude": 51.40827
    },
    {
        "postcode": "NW1 8QL",
        "longitude": -0.142696,
        "latitude": 51.53929
    },
    {
        "postcode": "CR2 7PA",
        "longitude": -0.094105,
        "latitude": 51.36292
    }]

我想添加

如上所述，这是预期的结果，我无法达到结果，我现在迷失了。

“我想将“lat”和“lon”值以及“todaysDataPostcode”对象中的键添加到“data”对象中。

这应该在邮政编码匹配时完成。”

Answer 1

这就是你一直在追求的吗？

const arr1 = [{"location":"City of London","postcode":"EC1A 7BE","year":{"10":"464436","11":"442413","12":"525723","13":"465451","14":"625001","15":"783667","16":"736788","17":"820305","18":"802129","19":"864034","95":"91449","96":"108999","97":"116343","98":"124382","99":"149143","00":"173738","01":"284262","02":"344239","03":"261645","04":"326913","05":"330363","06":"316121","07":"360923","08":"471861","09":"400317"}},{"location":"Barking & Dagenham","postcode":"RM9 4TP","year":{"10":"162905","11":"163821","12":"163899","13":"167919","14":"184884","15":"220070","16":"258758","17":"282441","18":"291548","19":"298333","95":"50460","96":"50828","97":"54459","98":"57559","99":"64532","00":"71079","01":"82343","02":"98713","03":"134750","04":"150115","05":"164484","06":"162340","07":"176577","08":"194235","09":"166798"}}];

const arr2 = [{"postcode":"EC1A 7BE","longitude":-0.100404,"latitude":51.51775},{"postcode":"RM9 4TP","longitude":0.127884,"latitude":51.539774},{"postcode":"EN5 5RP","longitude":-0.194074,"latitude":51.65044},{"postcode":"DA16 3DN","longitude":0.102535,"latitude":51.464737},{"postcode":"HA9 9AA","longitude":-0.279243,"latitude":51.563322},{"postcode":"BR1 3NN","longitude":0.017131,"latitude":51.40827},{"postcode":"NW1 8QL","longitude":-0.142696,"latitude":51.53929},{"postcode":"CR2 7PA","longitude":-0.094105,"latitude":51.36292}];

const merged = arr1.map(e => (coords = arr2.find(ee => ee.postcode == e.postcode), Object.assign(e,{longitude:coords['longitude'],latitude:coords['latitude']})));

console.log(merged);

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