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法律学JavaScript 基于属性分隔对象
假设我们有一个如下对象 −
const obj = {
0: { "time": 1, "day": 1, },
1: { "time": 2, "day": 1, },
2: { "time": 3, "day": 1, },
3: { "time": 1, "day": 2, },
4: { "time": 2, "day": 2, },
5: { "time": 3, "day": 2, }
};我们需要编写一个 JavaScript 函数，它接受一个这样的对象，并按具有相同 day 键值对，将所有键值对组合到单独的子对象中。
输出
上述对象的输出应为 −
const output = { '1':
{ '1': { time: 1, day: 1 },
'2': { time: 2, day: 1 },
'3': { time: 3, day: 1 } },
'2':
{ '1': { time: 1, day: 2 },
'2': { time: 2, day: 2 },
'3': { time: 3, day: 2 } }
}示例
代码如下 −
const obj = { 0: { "time": 1, "day": 1, }, 1: { "time": 2, "day": 1, }, 2: { "time": 3, "day": 1, }, 3: { "time": 1, "day": 2, }, 4: { "time": 2, "day": 2, }, 5: { "time": 3, "day": 2, } }; const groupObject = obj => { let res = {}; res = Object.values(obj).reduce((acc, val) => { if(acc[val['day']] === undefined){ acc[val['day']] ={}; }; acc[val['day']][val['time']] = val; return acc; },{}); return res; }; console.log(groupObject(obj));
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输出
控制台中的输出 −
{
'1': {
'1': { time: 1, day: 1 },
'2': { time: 2, day: 1 },
'3': { time: 3, day: 1 }
},
'2': {
'1': { time: 1, day: 2 },
'2': { time: 2, day: 2 },
'3': { time: 3, day: 2 }
}
}
更新于: 12-10-2020
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