javascript - JS : find and merge similar objects in array by key

Question

我有一组数据。我需要通过 code 字段找到对应的对象并合并它们。如何做到这些？

const data = [
    {
      id: 'K1',
      code: 'KBP',
      zone: 'zone-k1'
    },
    {
      id: 'K2',
      code: 'KBP',
      zone: 'zone-k2'
    },
    {
      id: 'H',
      code: 'HCL',
      zone: 'zone-h'
    }
]


const expected = [
    {
      id: ['K1', 'K2'],
      code: 'KBP',
      zone: ['zone-k1', 'zone-k2']
    },
    {
      id: 'H',
      code: 'HCL',
      zone: 'zone-h'
    }
]

我试过使用 lodash uniqBy 和 groupBy，但没有成功。我认为应该通过 reduce 来完成:

const res = () => {
    const similar = data.reduce((item, acc) => {
    return item.id === acc.id;
  })
}

Answer 1

您可以使用 Array.prototype.reduce 并按 code 对数据进行分组。

const data = [
    {
      gateId: 'K1',
      code: 'KBP',
      zone: 'zone-k1'
    },
    {
      gateId: 'K2',
      code: 'KBP',
      zone: 'zone-k2'
    },
    {
      gateId: 'H',
      code: 'HCL',
      zone: 'zone-h'
    }
];

const dataset = data.reduce((acc, curr) => {
  if (acc[curr.code] === undefined) {
    acc[curr.code]  = {
      code: curr.code,
      id: [curr.gateId],
      zone: [curr.zone],
    }
  } else {
    acc[curr.code].id.push(curr.gateId)
    acc[curr.code].zone.push(curr.zone)
  }
  
  return acc;
}, {});

const res = Object.values(dataset);


console.log(res);

.as-console-wrapper{ min-height: 100vh !important; top: 0}

更多你可以看到这个answer