getting non-object error only in log file

Something is wrong!
I just realized it!

even with this activerecord,

PHP Code:

$this->db->get_where($tablename, $cond)->result(); 


supposed to get the result in an array, but still is an object

Code:

array(1) { [0]=> object(stdClass)#27 (2) {

this is my output!

even if I change the result type to

PHP Code:

$this->db->get_where($tablename, $cond)->result_array(); 


i get nested array!

Code:

array(1) { [0]=> array(2) {

Why am i getting nested?