APPropriate Behaviour
The book about all the things software writers do that aren't writing software.
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Category Archives: OOP
When did people favor composition over inheritance?
The phrase “favor composition over inheritance” has become one of those thought-terminating cliches in software design, and I always like to take a deeper look at those to understand where they come from and what ideas we’re missing if we … Continue reading
Posted in history, ooa/d, OOP
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Explicitly considering subtyping in inheritance
By far the post on this blog that gains the most long-term interest and attention is why inheritance never made any sense. In this post, I explain that there are three different ways to think about inheritance—ontological inheritance (this sort … Continue reading
The “return a command” trick This is a nice trick, but we need a phrase for that thing where you implement extreme late binding of functions by invoking an active function that selects the function you want based on its … Continue reading
An Imagined History of Object-Oriented Programming
Having looked at hopefully modern views on Object-Oriented analysis and design, it’s time to look at what happened to Object-Oriented Programming. This is an opinionated, ideologically-motivated history, that in no way reflects reality: a real history of OOP would require … Continue reading
Some programming languages have a final keyword, making types closed for extension and open for modification.
Runtime verification in Erlang by using contracts
About this paper Runtime verification in Erlang by using contracts, L.-A. Fredlund et al, presented at WFLP 2018. Notes Spoiler alert, but the conclusion to my book OOP the Easy Way is that we should have independently-running objects, like we … Continue reading
Mach and Matchmaker: kernel and language support for object-oriented distributed systems
About this paper Mach and Matchmaker: kernel and language support for object-oriented distributed systems , Michael B. Jones and Richard F. Rashid, from the proceedings of OOPSLA ’86. Notes Yes, 1986 was a long time ago, but the topics of … Continue reading
Posted in academia, architecture of sorts, OOP
Tagged History of Software Engineering
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Research Watch, and Java by Contract
I introduced Java by Contract, a tool for building design-by-contract style invariants, preconditions and postconditions in Java using annotations. It’s MIT licensed, contributions are welcome, and I hope this helps lots of people to introduce stronger correctness checking into your … Continue reading
Posted in academia, Java, OOP
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Cleaner Code
Readers of OOP the easy way will be familiar with the distinction between object-oriented programming and procedural programming. You will have read, in that book, about how what we claim is OOP in the sentence “OOP has failed” is actually … Continue reading
Two books
A member of a mailing list I’m on recently asked: what two books should be on every engineer’s bookshelf? Here’s my answer. Many software engineers, the ones described toward the end of Code Complete 2, would benefit most from Donald … Continue reading
