Add index_by() method to Query Builder

Has been suggested before. I don't like it, can break if the column doesn't have a constraint.

And it's not like it's hard to do ...

Code:

// $result is whatever result_array() gave you
// $slug is your index
$result = array_combine(array_column($result, $slug), $result);

Yes, I know, it is not difficult to do. But if it will be a part of Query Builder it will be cleaner and more beautiful.

Anyway, it is not critical feature. Thanks for reply!