before_wrong_code

wrong_code.rs

    // find the nearest cab in the fleet from the person
       let mut nearest_cab = fleet
            .into_iter()
            .reduce(|c1, c2| person.nearest_cab(&c1, &c2))
            .and_then(|x| Some(x.clone()))
            .expect("Unable to get the nearest cab");
           
    // check if the cab is assigned or not
        match is_free(nearest_cab.clone()) {
            Ok(_) => {
                // update cab destination and person_id
                nearest_cab.update_destination(Some(person.location.clone()));
                nearest_cab.update_person_id(ObjectId::parse_str(person_id).ok());
                // update cab by using `assign_person`
           ....
           ....