如何创建一个日期计数器？ 我试过使用reduce函数

Question

使用id，billStatus和tDate需要做一个daycounter，计算收到线索的日期。例子 => id: "1" 2 Billable against 8th of May AND 3 Billable for 9th of May than day counter will become => 1+1 = 2。

注意：如果我在一天内收到1个或7个线索，daycount将为1，并在第二天有新的线索时递增。

 data: [
      { id: "1", billStatus: "Billable", tDate: "05/08/2020", dayCounter: 0 },
      { id: "1", billStatus: "Billable", tDate: "05/08/2020", dayCounter: 0 },
      { id: "1", billStatus: "Non-Billable", tDate: "05/08/2020", dayCounter: 0 },
      { id: "1", billStatus: "Billable", tDate: "05/09/2020", dayCounter: 6 },
      { id: "1", billStatus: "Non-Billable", tDate: "05/09/2020", dayCounter: 0 },
      { id: "1", billStatus: "Billable", tDate: "05/09/2020", dayCounter: 0 },
      { id: "1", billStatus: "Billable", tDate: "05/09/2020", dayCounter: 0 },
      { id: "3", billStatus: "Billable", tDate: "05/10/2020", dayCounter: 0 },
      { id: "2", billStatus: "Billable", tDate: "05/10/2020", dayCounter: 0 },
      { id: "2", billStatus: "Non-Billable", tDate: "05/10/2020", dayCounter: 0 },
      ],




retult:  
data: [
          { id: "1", dayCounter: 0 },
          { id: "2",  dayCounter: 2 },
          { id: "3", dayCounter: 1 }]

Answer 1

你可以检查这个解决方案。虽然我不清楚你的预期输出。但希望它能为你提供一些想法。

const data = [
  { id: "1", billStatus: "Billable", tDate: "05/08/2020", dayCounter: 0 },
  { id: "1", billStatus: "Billable", tDate: "05/08/2020", dayCounter: 0 },
  { id: "1", billStatus: "Non-Billable", tDate: "05/08/2020", dayCounter: 0 },
  { id: "1", billStatus: "Billable", tDate: "05/09/2020", dayCounter: 6 },
  { id: "1", billStatus: "Non-Billable", tDate: "05/09/2020", dayCounter: 0 },
  { id: "1", billStatus: "Billable", tDate: "05/09/2020", dayCounter: 0 },
  { id: "1", billStatus: "Billable", tDate: "05/09/2020", dayCounter: 0 },
  { id: "3", billStatus: "Billable", tDate: "05/10/2020", dayCounter: 0 },
  { id: "2", billStatus: "Billable", tDate: "05/10/2020", dayCounter: 0 },
  { id: "2", billStatus: "Non-Billable", tDate: "05/10/2020", dayCounter: 0 },
];

const billableDates = data.reduce((res, obj) => {
  if (!res[obj.id]) {
    if (obj.billStatus === "Billable") {
      res[obj.id] = { dates: new Set() };
      res[obj.id].dates.add(obj.tDate);
    }
  } else {
    res[obj.id].dates.add(obj.tDate);
  }
  return res;
}, {});

const modifiedData = data.reduce((store, obj) => {
  if (!store[obj.id] && obj.billStatus === "Billable") {
    store[obj.id] = obj;
    store[obj.id].dayCounter = billableDates[obj.id].dates.size;
    store[obj.id].dates = [...billableDates[obj.id].dates];
  }
  return store;
}, {});

console.log(Object.values(modifiedData));