The code creates a two number array, whiteGifts and blackGifts . It then calculates the difference between the values in each array, and assigns the smaller value to min . Finally, it assigns the value of min to the variable named min .
function taumBday(b, w, bc, wc, z) {
const gifts = BigInt(b) + BigInt(w);
const whiteGifts = gifts * BigInt(wc) + (BigInt(b) * BigInt(z));
const blackGifts = gifts * BigInt(bc) + (BigInt(w) * BigInt(z));
let min = BigInt(b) * BigInt(bc) + BigInt(w) * BigInt(wc);
(blackGifts < min) && (min = blackGifts);
(whiteGifts < min) && (min = whiteGifts);
return min;
}