Hi.

[...]


I recall that we did not want "...Impl" classes. Is another
implementation
foreseen?


[...]

As for the Impl classes, theses are package private implementations of interfaces, so the users won't see the name. For the LeastSquareProblem
interface I could see a lazy evaluation implementation, or perhaps an
implementation that applies data editing by zeroing out certain residuals.


Then, what about further hiding, by making it an inner classes of
"LeastSquaresFactory"? [And give it a name that will distinguish it from
those other future implementations.]


Regards,
Gilles


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