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Kotlin Generics: why is the supertype of "SomeActor : DataActor<SomeData>" "DataActor<out SomeData>" and not "DataActor<SomeData>"?

score 52 · Answer 1 · 2023-04-06T11:13:16.127000

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TechQA.

List Question

Kotlin Generics: why is the supertype of "SomeActor : DataActor<SomeData>" "DataActor<out SomeData>" and not "DataActor<SomeData>"?

super-type subtype discriminator in Primary key and design simplicty?

DDL FOR SUPERTYPE AND SUBTYPE ORACLE

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MySQL trigger to target an attribute of a column

Why is this class not considered a supertype as a parameter?

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Can Lucidchart make Enhanced ER Diagram (EERD)? if Yes then how to model supertype, subtype and inheritance?

cannot reference "this" before supertype constructor has been called

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