const shots = [
{id: 1, amount: 2},
{id: 2, amount: 4},
{id: 3, amount: 52},
{id: 4, amount: 36},
{id: 5, amount: 13},
{id: 6, amount: 33}
];
shots.reduce((acc, shot) => acc = acc > shot.amount ? acc : shot.amount, 0);
var obj = {a: 1, b: 2, undefined: 1};
Object.keys(obj).reduce((a, b) => obj[a] > obj[b] ? a : b);
Math.max.apply(Math, array.map(function(o) { return o.y; }))
Math.max.apply(Math, array.map(function(o) { return o.y; }))