Added new functions:
index_rank
index_select
index_access
to avoid indexing into the hashtables every call. They only return the indeces from the wavelet matrix aka the position of an edge destination in the sequence.
We could either have both the original functions and these, only these or make these private.
Added new functions: index_rank index_select index_access
to avoid indexing into the hashtables every call. They only return the indeces from the wavelet matrix aka the position of an edge destination in the sequence.
We could either have both the original functions and these, only these or make these private.