How to calculate each object in the array in separate array based on truthy condition?

Question

I have this array

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,
    },

i needed to have separete array where when i make the iteration throught this array i will calculate the total of all awardedCapacities where the supplier name is same

For example i should have array where i will have this output

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

The solution for this is:

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);

but now i need to check also if the switcherStatus is setted to true only - if it is setted to false i should not calculate it's awardedCapacity and i should not push into the array if it is the only one object

so the output should be

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

C IS excluded here because it is switcherStatus false, and A is 8 - because on object was with switcherStatus of false

i can't find a way to modify this reduce code here for that purpose.

Answer 1

Just add a condition in your reduce function

 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);