"Prefer composition over inheritance" is actually a well-known mantra and appear... | Hacker News

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		nsajko on Sept 17, 2023 \| parent \| context \| favorite \| on: Java 21 makes me like Java again "Prefer composition over inheritance" is actually a well-known mantra and appears in, for example, the Design Patterns book from 1994, which is basically the OOP bible. And this is within the OOP bubble, you won't even find inheritance outside of it. https://en.wikipedia.org/wiki/Design_Patterns Don't take undergraduate OOP courses seriously.

chii on Sept 17, 2023 [–]

> a well-known mantra

which isn't an explanation, but just the same as the OOP mantra that was taught in undergraduate courses.

zelphirkalt on Sept 17, 2023 | [–]

One reason is the unstable base class phenomenon. A some changes in the base class require you to constantly change all your derived classes.

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