Re: Fragmented arrays?

Jon Loldrup wrote:
> I read that the basis library Array structure has constant time access
> and update*.
> If an array of length n has to be able to be updated in constant time
> (that is, invariant from the length of the array), I can only see that
> it can be done if arrays are allowed to be fragmented across memory,
> like lists are.

SML arrays are mutable, so they can be implemented in the same way as in 
C, with a run-time size slot added for each array.  You seem to be 
discussing issues more pertinent to SML vectors, which are a distinct 
(immutable) type family, for which no cell update operation is provided.

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