如何根据真实条件在单独的数组中计算数组中的每个 object？

Question

我有这个数组

bidsList = [
    {
      supplierName:'A',
      awardedCapacity:5,
      switcherStatus: true
    },
    {
      supplierName:'B',
      awardedCapacity:10,
      switcherStatus: true,
    },
    {
      supplierName:'A',
      awardedCapacity:5,
      switcherStatus: false,
    },
    {
      supplierName:'A',
      awardedCapacity:3,
      switcherStatus: true,
    },
    {
      supplierName:'B',
      awardedCapacity:5,
      switcherStatus: true,
    },
    {
      supplierName:'C',
      awardedCapacity:2,
      switcherStatus: false,
    },

我需要有单独的数组，当我通过这个数组进行迭代时，我将计算供应商名称相同的所有奖励容量的总数

例如我应该有一个数组，我将有这个 output

 let newArr = [
    {
      supplierName: 'A',
      totalAwarded: 13,
    },
    {
      supplierName:'B',
      totalAwarded: 15,
    },
    {
      supplierName:'C',
      totalAwarded: 2,
    }
  ]

解决方案是：

let newArr = [];
bidsList.reduce(function(acc, val) {
  if (!acc[val.supplierName]) {
    acc[val.supplierName] = { supplierName: val.supplierName, awardedCapacity: 0 };
    newArr.push(acc[val.supplierName])
  }
  acc[val.supplierName].awardedCapacity += val.awardedCapacity;
  return acc;
}, {});

console.log(newArr);

但现在我还需要检查 switcherStatus 是否仅设置为 true - 如果它设置为 false，我不应该计算它的奖励容量，如果它是唯一的一个 object，我不应该推入数组

所以 output 应该是

 let newArr = [
    {
      supplierName: 'A',
      totalAwarded: 8,
    },
    {
      supplierName:'B',
      totalAwarded: 15,
    },
  ]

C在这里被排除，因为它是 switcherStatus 假，而 A 是 8 - 因为在 object 上是 switcherStatus 为假

为此，我找不到在这里修改此减少代码的方法。

Answer 1

只需在您的reduce function 中添加一个条件

 var bidsList = [{ supplierName: 'A', awardedCapacity: 5, switcherStatus: true }, { supplierName: 'B', awardedCapacity: 10, switcherStatus: true, }, { supplierName: 'A', awardedCapacity: 5, switcherStatus: false, }, { supplierName: 'A', awardedCapacity: 3, switcherStatus: true, }, { supplierName: 'B', awardedCapacity: 5, switcherStatus: true, }, { supplierName: 'C', awardedCapacity: 2, switcherStatus: false, } ]; var result = bidsList.reduce((a, c) => { if (c.switcherStatus) { let supplier = a.find(e => e.supplierName == c.supplierName); if (supplier) supplier.totalAwarded += c.awardedCapacity; else a.push({ supplierName: c.supplierName, totalAwarded: c.awardedCapacity }); } return a; }, []); console.log(result);