Use flatMap instead of filter + map

use-flatmap.js

const ipl2023Auction = [
  { name: "Dhoni", broughtBy: 'CSK' },
  { name: "Santner", broughtBy: 'CSK' },
  { name: "Faf", broughtBy: 'RCB' },
  { name: "Kohli", broughtBy: 'RCB' },
  { name: "Rohit", broughtBy: 'MI' },
  { name: "Archer", broughtBy: 'MI' }
];

ipl2023Auction.filter(player => player.broughtBy === 'MI').map(player => player.name) // [ 'Rohit', 'Archer' ]

const CSK = ipl2023Auction.flatMap((player) =>
  player.broughtBy === "CSK" ? [player.name] : []
);

console.log(CSK); // [ 'Dhoni', 'Santner' ]

// using reduce()
const cskByReduce = ipl2023Auction.reduce((acc, player) => {
  if (player.broughtBy === "CSK") {
    acc.push(player.name);
  }
  return acc;
}, []);

console.log(cskByReduce); // [ 'Dhoni', 'Santner' ]