APPropriate Behaviour
The book about all the things software writers do that aren't writing software.
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Category Archives: OOP
Lighter UIViewControllers
The first issue of Objective-C periodical objc.io has just been announced: Issue #1 is about lighter view controllers. The introduction tells you a bit more about this issue and us. First, Chris writes about lighter view controllers. Florian expands on … Continue reading
enum class in C++11
I’ve opened the new edition of Cuboid Stroustrup exactly once, and I’ve already learned exactly one useful thing. Before going into what that thing was, a comment on the book: The C++ Programming Language is, along with Object-Oriented Software Construction … Continue reading
On protocols that aren’t
There’s a common assumption when dealing with Objective-C protocols or Java interfaces (or abstract classes, I suppose): that you’re abstracting away the implementation of an object leaving just its interface. “Oh, don’t mind how I quack, all you need to … Continue reading
Posted in code-level, OOP
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Specifications for interchanging objects
One of the interesting aspects of Smalltalk and similar languages including Objective-C and Ruby is that while the object model exposes a hierarchy of classes, consumers of objects in these environments are free to ignore the position of the object … Continue reading
Posted in documentation, OOP, software-engineering, TDD, tool-support
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Can Objective-C be given safe categories?
That was the subject of this lunchtime’s vague thinking out loud. The problems with categories are well-known: you can override the methods already declared on a class, or the methods provided in another category (and therefore another category can replace … Continue reading
Posted in code-level, OOP
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As the Kaiser Chiefs might say: Ruby ruby ruby n00bie
Imagine someone took the training wheels off of Objective-C. That’s how I currently feel. I’ve actually had a long—erm, not quite “love-hate”, more “‘sup?-meh”—relationship with Ruby. I’ve long wanted to tinker but never really had a project where I could … Continue reading
On designing collections
Introduction This post explores the pros and the cons of following the design rule “Objects responsible for collections of other objects should expose an interface to the collection, not the collection itself”. Examples and other technical discussion is in Objective-C, … Continue reading
Posted in Foundation, OOP, software-engineering
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Coupling in a Cocoa[ Touch] App
This is one of my occasional “problem looking for a solution” posts. It’d be great to discuss this over on App.net or G+ or somewhere. I don’t think, at the outset of writing this post, that the last sentence is … Continue reading
Posted in AAPL, code-level, OOP
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A two-dimensional dictionary
What? A thing I made has just been open-sourced by my employers at Agant: the AGTTwoDimensionalDictionary works a bit like a normal dictionary, except that the keys are CGPoints meaning we can find all the objects within a given rectangle. … Continue reading
Posted in code-level, iPad, iPhone, Mac, OOP, performance, software-engineering
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The Liskov Citation Principle
In her keynote speech at QCon London 2013 on The Power of Abstraction, Barbara Liskov referred to several papers contemporary with her work on abstract data types. I’ve collected these references and found links to free copies of the articles … Continue reading
Posted in code-level, documentation, OOP, software-engineering, Talk
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