TspComponent.prototype.getVertexToInclude = function (index) {
        var arr = [];
        for (var i = 0; i < this.path.length - 1; i++) {
            var temp_arr = this.path.slice();
            temp_arr.splice(i + 1, 0, index);
            var s1 = this.matrix[temp_arr[i]][temp_arr[i + 1]];
            var s2 = this.matrix[temp_arr[i + 1]][temp_arr[i + 2]];
            var s3 = this.matrix[temp_arr[i]][temp_arr[i + 2]];
            var sum = s1 + s2 - s3;
            arr.push({ cost: sum, path: temp_arr });
        }
        return arr.reduce(function (l, e) {
            return e.cost < l.cost ? e : l;
        });