Agree, but isn't the conclusion that the internal map returns NaN, and if desired, the vector converts that to 0.0? In my world of maps, I don't have any case where 'null' should mean '0'.
On Thu, Dec 17, 2009 at 2:18 AM, Ted Dunning <[email protected]> wrote: > This seems most congenial. As Jake says, 0 is definitely handier for the > sparse matrix/vector case and NaN is very nice for the collection case.
