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Answers and rating deltas for

Why is it possible to define an variable with type of a superclass, but assign it an object of a ...

Author Votes Δ
Michael Borgwardt 5 +0.89
RafaƂ Dowgird 5 +3.07
Dave Costa 2 +0.17
Rossini 2 +0.95
tomjen 1 -2.27
alphazero 1 -2.16
Alnitak 1 -1.00
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