[英]Lodash to subgroup items in Array of Objects
I have an Array of objects with band property.我有一个带有带属性的对象数组。 i would like to group them according to band
我想根据乐队将它们分组
I have tried _groupBy and failed to get expected result我试过 _groupBy 并没有得到预期的结果
var data=[
{
"tOffice": 123,
"cType": 5000,
"band": -4877,
"minCh": 12,
"maxCh": 20
},
{
"tOffice": 123,
"cType": 5000,
"band": -4877,
"minCh": 1,
"maxCh": 2
},
{
"tOffice": 123,
"cType": 5000,
"band": -4877,
"minCh": 11,
"maxCh": 12
},
{
"tOffice": 123,
"cType": 6000,
"band": -5877,
"minCh": 11,
"maxCh": 12
},
{
"tOffice": 456,
"cType": 5000,
"band": -4544,
"minCh": 12,
"maxCh": 20
},
{
"tOffice": 456,
"cType": 5000,
"band": -4544,
"minCh": 10,
"maxCh": 11
},
{
"tOffice": 456,
"cType": 6000,
"band": -5211,
"minCh": 12,
"maxCh": 20
},
{
"tOffice": 456,
"cType": 6000,
"band": -5211,
"minCh": 12,
"maxCh": 20
},
{
"tOffice": 456,
"cType": 6000,
"band": -5211,
"minCh": 12,
"maxCh": 20
}
];
Expected Output:预期输出:
var expectedResult = [{
tOffice: 123,
bandType: [{
band: '123-5000',
minMaxCharge: [{
minCh: 12,
maxCh: 20
}, {
minCh: 1,
maxCh: 2
}, {
minCh: 11,
maxCh: 12
}]
},
{
band: '123-6000',
minMaxCharge: [{
minCh: 11,
maxCh: 12
}]
}
]
}, {
tOffice: 456,
bandType: [{
band: '456-5000',
minMaxCharge: [{
minCh: 12,
maxCh: 20
}, {
minCh: 10,
maxCh: 11
}]
},
{
band: '456-6000',
minMaxCharge: [{
minCh: 12,
maxCh: 20
}, {
minCh: 12,
maxCh: 20
}]
}
]
}]
The expected result should contain a tOffice with max 2 combinations(5000 & 6000), band is a combination of tOffice+cType.预期结果应包含最多 2 种组合(5000 和 6000)的 tOffice,band 是 tOffice+cType 的组合。
_.chain(data).groupBy("band").map(function(v, i) {
return {
}
})
I have tried some ES6 way and found that lodash methods will be a good choice, but i am not aware about that我尝试了一些 ES6 方式,发现 lodash 方法将是一个不错的选择,但我不知道
This is a vanila js solution.这是一个 vanila js 解决方案。 You could do something like this using
reduce
and Object.values
你可以使用
reduce
和Object.values
做这样的事情
var data=[{"tOffice":123,"cType":5000,"band":-4877,"minCh":12,"maxCh":20},{"tOffice":123,"cType":5000,"band":-4877,"minCh":1,"maxCh":2},{"tOffice":123,"cType":5000,"band":-4877,"minCh":11,"maxCh":12},{"tOffice":123,"cType":6000,"band":-5877,"minCh":11,"maxCh":12},{"tOffice":456,"cType":5000,"band":-4544,"minCh":12,"maxCh":20},{"tOffice":456,"cType":5000,"band":-4544,"minCh":10,"maxCh":11},{"tOffice":456,"cType":6000,"band":-5211,"minCh":12,"maxCh":20},{"tOffice":456,"cType":6000,"band":-5211,"minCh":12,"maxCh":20},{"tOffice":456,"cType":6000,"band":-5211,"minCh":12,"maxCh":20}]; const merged = data.reduce((r,{tOffice, cType, minCh, maxCh})=>{ const office = r[tOffice] = r[tOffice] || {tOffice, bandType:{}}; const band = `${tOffice}-${cType}` const nested = office.bandType[band] = office.bandType[band] || {band, minMaxCharge:[]}; nested.minMaxCharge.push({minCh, maxCh}) return r },{}) const final = Object.values(merged); final.forEach(a => a.bandType = Object.values(a.bandType)) console.log(final)
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