ES6 Find the maximum number of an array of objects

Question

I have the following data

shots = [
    {id: 1, amount: 2},
    {id: 2, amount: 4}
]

Now I\'m trying to get the object which

Answer 1

You could check the amount property of both items and return the item with the greatest amount.

let highest = shots.reduce((a, b) => a.amount > b.amount ? a : b);

For same amount, you get the first object with the same amount only.

It does not work with an empty array.

If you like all objects with the same highest amount, you could reduce the array with with two conditions.

let highest = shots.reduce((r, o) => {
        if (!r || o.amount > r[0].amount) return [o];
        if (o.amount === r[0].amount) r.push(o);
        return r;
    }, undefined);