APPropriate Behaviour
The book about all the things software writers do that aren't writing software.
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Category Archives: OOP
On Inheritance
I recently had the chance to give my OOP-in-FP-in-Swift talk again in NSLondon, and was asked how to build inheritance in that object system. It’s a great question, I gave what I hope was a good answer, and it’s worth … Continue reading
machoo – Object-Oriented Programming in Object-Oriented Programming in the GNU HURD
For the last few weeks, my when-I-get-to-it project has been machoo, which is sort of an object-oriented system on the HURD but mostly an excuse to learn about how Mach messaging works. I decided to build a Smalltalk-style “give me … Continue reading
Posted in code-level, OOP, techradar
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An update on the HURD project
Last time, on Structure and Interpretation of Computer Programmers, I was building an object-oriented programming system on top of the HURD, and had realised that I needed to use its trivfs library for a sender to be able to discover … Continue reading
Posted in GNU, OOP, techradar
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Gently HURDing the side projects
I find it problematic that even at times when I’m avoiding computing outside of work, I still have ideas about things I would like to try out or improve in computing “if I had the time”. I tend to capture … Continue reading
Posted in GNU, learning, OOP, techradar
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An unhelpful distinction
Object-Oriented Programming is quite simple: it’s just choosing what function to run based on the parameters to the function (whether through method sending like Smalltalk, polymorphic lookup like CLOS, or table searching like C++: usually pattern-matching like Haskell would be … Continue reading
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OOP as an organic approach to computing
I’m reading How Not to Network a Nation, which talks a lot about cybernetics. Not merely cybernetics as the theory of control in complex systems (cybernetics shares a root with “governor”, fans of the etymological fallacy!) but cybernetics as the … Continue reading
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Give me an S
S – I can find the thing I need to change. O – My change will either be an extension or a replacement. L – My replacement or extension needs to be a drop-in change. I – Here’s what my … Continue reading
Posted in code-level, OOP
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When Object-Oriented Programming Isn’t
A problem I was investigating today led me to a two-line Ruby method much like this: class App # … def write_file_if_configured file_writer = FileWriter.new(@configuration.options) file_writer.write if file_writer.can_write? end end This method definitely looks nice and object-oriented, and satisfies many … Continue reading
If Object-Oriented Programming were announced today
Here’s an idea: the current backlash against OOP is actually because people aren’t doing OOP, they’re doing whatever they were doing before OOP. But they’re calling it OOP, because the people who were promoting OOP wanted them to believe that … Continue reading
Posted in FP, OOP
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Prototypical object-oriented programming
Some people think that the notion of classes is intrinsic to object-oriented programming. Bertrand Meyer even wrote a textbook about OOP called A Touch of Class. But back in the 1980s, Alan Borning and others were trying to teach object-oriented … Continue reading
Posted in javascript, OOP
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