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Re: [Format] Pointer types / span types


Le 30/04/2018 à 23:39, Brian Hulette a écrit :
> Yes my first reaction to both of these requests is
> - would dictionary-encoding work?
> - would a List<T> work?
> 
> I think for the former the analogy is more clear, for the latter, 
> technically a List encodes start and stop indices with an offset array 
> rather than separate arrays for start and stop indices. Is there a 
> reason an offset array wouldn't work for the OAMap use-case though?

With an offsets array, spans (lists) are contiguous: span N + 1 starts
off where span N stops.  With separate start/stops array, they needn't
be: the logical array can "walk" the physical array in any order.

Regards

Antoine.