get closest number from an array

closest.js

var counts = [4, 9, 15, 100, 2],
    goal = 70;

function closest(array, x) {
    var min,
        chosen = array[0];
    for (var i in array) {
        min = Math.abs(x - chosen);
        if (Math.abs(x - array[i]) < min) {
            chosen = array[i];
        }
    }
    return chosen;
}

console.log(closest(counts, goal))

reduce-closest.js

var counts = [4, 9, 15, 100, 2],
    goal = 70;

// var closest = counts.reduce(function (prev, curr) {
//   return Math.abs(curr - goal) < Math.abs(prev - goal) ? curr : prev;
// });
var closest = counts.reduce((prev, curr) =>
                            Math.abs(curr - goal) < Math.abs(prev - goal) ?
                            curr : prev
);
console.log(closest);