如何创建日期计数器？我尝试使用 reduce 函数

Question

使用 id、billStatus 和 tDate 需要制作一个日计数器来计算收到潜在客户的日期。示例 => 对于 id:"1" 2 可在 5 月 8 日计费 AND 3 可在 5 月 9 日计费比天计数器将变为 => 1+1 = 2

注意：如果我一天有 1 个潜在客户或 7 个潜在客户，daycount 将为 1 并在第二天有新潜在客户时递增。

 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

您可以查看此解决方案。虽然我不清楚你的预期输出。但希望它能给你一些想法。

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));

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