Function generate_table 

pub fn generate_table<'cont, T, I: Iterator<Item = &'cont T>, H: Fn(&T) -> usize>(
    items: I,
    num_items: usize,
    hash_function: H,
) -> Vec<Option<&'cont T>>

Compute an open addressed, quadratically probed hash table containing items. The returned table is a list containing the elements of the iterable items and None in unused slots.