javascript - Finding longest string in array

Question

Is there a short way to find the longest string in a string array?

Something like arr.Max(x => x.Length);?

Answer 1

Available since Javascript 1.8/ECMAScript 5 and available in most older browsers:

var longest = arr.reduce(
    function (a, b) {
        return a.length > b.length ? a : b;
    }
);

Otherwise, a safe alternative:

var longest = arr.sort(
    function (a, b) {
        return b.length - a.length;
    }
)[0];