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However, “Dog isa Animal” is worse than useless, it actively hampers your code and makes your life worse.
Useful inheritance patterns are all over the place in GUI / Model View Controller code however. “Button isa Window”, and “FileStream isa Stream”, and “StringStream isa Stream” in C++. If you stick with SOLID principles, inheritance helps your code significantly.
Inheritance is useful.
However, “Dog isa Animal” is worse than useless, it actively hampers your code and makes your life worse.
Useful inheritance patterns are all over the place in GUI / Model View Controller code however. “Button isa Window”, and “FileStream isa Stream”, and “StringStream isa Stream” in C++. If you stick with SOLID principles, inheritance helps your code significantly.