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Jun 26 at 18:36 comment added RoToRa There shouldn't be any danger from an NPE: 1) The developer should be aware of the use of null here 2) Any decent IDE nowadays will warn you. And instead of a "third player", a better solution would have an interface from which both the record Piece and an empty piece/field would inherit.
Jun 26 at 15:40 comment added J_H Modeling with null is certainly one design choice that could work. Another would be to introduce a third player who has only one kind of piece: EMPTY. Now we can’t NPE.
Jun 26 at 13:03 history edited toolic CC BY-SA 4.0
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Jun 26 at 12:53 history answered RoToRa CC BY-SA 4.0