main.js

        Array.prototype.byCount = function () {
            var itm, a = [], L = this.length, o = {};
            for (var i = 0; i < L; i++) {
                itm = this[i];
                if (!itm) continue;
                if (o[itm] == undefined) o[itm] = 1;
                else ++o[itm];
            }
            for (var p in o) a[a.length] = p;
            return a.sort(function (a, b) {
                if (o[b] !== o[a]) {
                    return o[b] - o[a];
                }
                return a.charCodeAt(0) - b.charCodeAt(0);
            });
        };