let array = [
  {
    "vendorBidId": null,
    "participantName": "test [email protected]",
    "bidAmount": 0,
    "productionRate": null,
    "bidTime": null,
    "isYou": false,
    "awarded": false
  },
  {
    "vendorBidId": 16,
    "participantName": "test [email protected]",
    "bidAmount": 131,
    "productionRate": 131,
    "bidTime": "2021-09-18T08:11:21.295",
    "isYou": true,
    "awarded": false
  },
  {
    "vendorBidId": 20,
    "participantName": "[email protected]",
    "bidAmount": 30,
    "productionRate": 30,
    "bidTime": "2021-0a-18T08:11:21.295",
    "isYou": true,
    "awarded": false
  },
  {
    "vendorBidId": 30,
    "participantName": "[email protected]",
    "bidAmount": 40,
    "productionRate": 40,
    "bidTime": "2021-0a-18T08:11:21.295",
    "isYou": true,
    "awarded": false
  },
  {
    "vendorBidId": null,
    "participantName": "test [email protected]",
    "bidAmount": 0,
    "productionRate": null,
    "bidTime": null,
    "isYou": false,
    "awarded": false
  },
  {
    "vendorBidId": 40,
    "participantName": "[email protected]",
    "bidAmount": 50,
    "productionRate": 50,
    "bidTime": "2021-0a-18T08:11:21.295",
    "isYou": true,
    "awarded": false
  }
]

I want to sort this array in ascending order(bidAmount), and if the vendorBidId is null don't sort keep in the bottom.

I tried like this

array.sort((a,b) => parseFloat(a.bidAmount) - parseFloat(b.bidAmount)).map((ele) => console.log(ele.bidAmount))

I'm need an out like 30,40,50,131,0,0, but for the my above code it will just sort only. I tried with reduce but that does't work properly

CodePudding user response：

1. Separate your arrays based in vendorBidId being null or not.
2. Sort the part you want to sort
3. concat the other array.

CodePudding user response：

array.sort((a,b) => {
  const n = a.vendorBidId === null ? Number.MAX_VALUE : a.bidAmount;
  const m = b.vendorBidId === null ? Number.MAX_VALUE : b.bidAmount;
  return n - m; 
});
// "2.5"   "3.5" = "2.53.5"
// "2.5" - "3.5" = -1 

CodePudding user response：

Building on what DragatS has shared.. just map through the result of the sort() like this to get the result of [30,40,50,131,0,0]

const res = array
.sort((a, b) => {
    const n = a.vendorBidId === null ? Number.MAX_VALUE : a.bidAmount;
    const m = b.vendorBidId === null ? Number.MAX_VALUE : b.bidAmount;
    return n - m;
})
.map(item => item.bidAmount);
console.log(res);