Menghitung row dalam database?

mohon arahannya agan agan semua.. apakah ada cara lain untuk count jumlah laki-laki dan perempuan kayak count array?

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

class Karyawan extends CI_Model {
   public function getAll() {
   return $this->db->get('karyawan')->result();
   }

public function count() {
   return $this->db->count_all('karyawan');
   }

public function countMen() {
   $this->db->where('gender', 'laki-laki');
   $this->db->from('karyawan');
   return $this->db->count_all_results();
   }

public function countWoman() {
   $this->db->where('gender', 'perempuan');
   $this->db->from('karyawan');
   return $this->db->count_all_results();
   }
}