November 2019
Beginner
804 pages
20h 1m
English
Content preview from Learn TypeScript 3 by Building Web Applications
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Composition over inheritance
One last point that we should touch on before we continue is the idea of composition over inheritance. It is generally useful and also very relevant for the domain model of the applications that we will implement in the next chapters.
While designing the domain model of applications, you will often have the choice between relying on is-a relationships (that is, inheritance) or has-a relationships through composition and interfaces.
Creating good domain models is both challenging and fun. It takes experience to create solid ones with the right amount of abstraction and that can evolve while remaining maintainable over time. It is definitely a skill well worth acquiring for any software developer.
Inheritance is ...
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