JavaScript में की द्वारा पढ़ें और JSON के रूप में पार्स करें

मान लीजिए हमारे पास इस तरह का JSON ऐरे है:

const arr = [{
    "data": [
        { "W": 1, "A1": "123" },
        { "W": 1, "A1": "456" },
        { "W": 2, "A1": "4578" },
        { "W": 2, "A1": "2423" },
        { "W": 2, "A1": "2432" },
        { "W": 2, "A1": "24324" }
    ]
}];

हमें एक JavaScript फंक्शन लिखना है जो ऐसा ऐरे लेता है और इसे निम्नलिखित JSON ऐरे में बदलता है:

[
    {
        "1": [
            { "A1": "123" },
            { "A1": "456" }
        ]
    },
    {
        "2": [
            { "A1": "4578" },
            { "A1": "2423" },
            { "A1": "2432" },
            { "A1": "24324" }
        ]
    }
];

उदाहरण

const arr = [{
    "data": [
        { "W": 1, "A1": "123" },
        { "W": 1, "A1": "456" },
        { "W": 2, "A1": "4578" },
        { "W": 2, "A1": "2423" },
        { "W": 2, "A1": "2432" },
        { "W": 2, "A1": "24324" }
    ]
}];
const groupJSON = (arr = []) => {
    const preCombined = arr[0].data.reduce((acc, val) => {
        acc[val.W] = acc[val.W] || [];
        acc[val.W].push({ A1: val.A1 });
        return acc;
    }, {});
    const combined = Object.keys(preCombined).reduce((acc, val) => {
        const temp = {};
        temp[val] = preCombined[val];
        acc.push(temp);
        return acc;
    }, []);
    return combined;
};
console.log(JSON.stringify(groupJSON(arr), undefined, 4));

आउटपुट

कंसोल में आउटपुट होगा:

[
    {
        "1": [
            { "A1": "123" },
            { "A1": "456" }
        ]
    },
    {
        "2": [
            { "A1": "4578" },
            { "A1": "2423" },
            { "A1": "2432" },
            { "A1": "24324" }
        ]
    }
]