javascript - _.groupBy 动态键

Question

我正在使用这个数据结构，并尝试为 (patApplied & insApplied) 键生成一个总对象。

我对在 patApplied 和 insApplied 上使用 _.groupBy 使用动态键名感到困惑(它们可能会根据用户选择而改变)。

我正在尝试 groupBy 映射/减少值以匹配所需的 total 对象

[
  {
    procedure: '01402',
    fee: 82.08,
    patApplied: {
      'Credit Adjustment': 20,
      'User payment': 30
    },
    insApplied: {
      insPayment: 5,
      'ins check': 10
    }
  },
  {
    procedure: '01801',
    fee: 165.16,
    patApplied: {
      'Credit Adjustment': 0,
      'User payment': 10
    },
    insApplied: {
      insPayment: 0,
      'ins check': 7
    }
  }
]

期望的输出

let total = {
  patApplied: [ {Credit Adjustment: 20},{User payment: 40} ]
  insApplied: [ {insPayment: 10},{ins check: 7} ]
}

Answer 1

通过散布到 _.mergeWith() 中组合对象，然后使用 _.pick() 提取您想要的属性:

const data = [{"procedure":"01402","fee":82.08,"patApplied":{"Credit Adjustment":20,"User payment":30},"insApplied":{"insPayment":5,"ins check":10}},{"procedure":"01801","fee":165.16,"patApplied":{"Credit Adjustment":0,"User payment":10},"insApplied":{"insPayment":0,"ins check":7}}]

const result = _.pick(
  _.mergeWith({}, ...data, (obj, src) => _.isNumber(obj) ? obj + src : undefined)
, ['patApplied', 'insApplied'])

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js"></script>

以及使用 lodash/fp 的同一解决方案的简洁版本和 _.flow():

const { flow, mergeAllWith, cond, isNumber, add, pick } = _

const fn = _.flow(
  mergeAllWith(cond([[isNumber, add]])),
  pick(['patApplied', 'insApplied'])
)

const data = [{"procedure":"01402","fee":82.08,"patApplied":{"Credit Adjustment":20,"User payment":30},"insApplied":{"insPayment":5,"ins check":10}},{"procedure":"01801","fee":165.16,"patApplied":{"Credit Adjustment":0,"User payment":10},"insApplied":{"insPayment":0,"ins check":7}}]

const result = fn(data)

console.log(result)

<script src='https://cdn.jsdelivr.net/g/lodash@4(lodash.min.js+lodash.fp.min.js)'></script>