Yes, the WHICH method controls how the hashing happens. But the more fundamental principle is that the method always return the same value for the same objects. This tends to be implemented by returning either (a representation of) the reference, or the value itself (which must then not be mutable).
// Carl On Mon, Dec 1, 2014 at 12:22 PM, Theo van den Heuvel <vdheu...@heuvelhlt.nl> wrote: > Thanks, Carl, that helps. I just need to add a WHICH method. great. > > Theo >
