javascript – 处理这个对象数组并将其组合成一个

我有这个对象.

var orig_array =   [
    { "MSG_ID": { "lgth": "1","payload": 0 } },{ "STATE_1": { "lgth": "1","payload": "XX" } },{ "STATE_2": { "lgth": "1","payload": "XXX" } },{ "MSG_ID": { "lgth": "1","payload": 1 } },"payload": "X" } },{ "STATE_3": { "lgth": "6","payload": 2 } },"payload": "XXXX" } }
];

我想通过将一些相关对象分组为一个对象来减少对象的数量.

生成的数组应如下所示;

var processed_array =   [
    { "MSG_ID": { "lgth": "1","payload": 0 },"STATE_1": { "lgth": "1","payload": "XX" },"STATE_2": { "lgth": "1","payload": 1 },"payload": "X" },"STATE_3": { "lgth": "6","payload": 2 },"payload": "XXXX" } }
];

在orig_array中,有3个对象具有“MSG_ID”.随后的“STATE_X”对象被组合到上面的“MSG_ID”对象中.我已经盯着这个问题一段时间了.任何人都可以帮助或提供一些提示作为先发制人？

解决方法

您可以使用 Array#reduce并查找“MSG_ID”作为组更改.

var array = [{ "MSG_ID": { "lgth": "1","payload": "XXXX" } }],grouped = array.reduce(function (r,a) {
        var key = Object.keys(a)[0];
        if (key === 'MSG_ID') {
            r.push({});
        }
        r[r.length - 1][key] = a[key];
        return r;
    },[]);

console.log(grouped);