I've been pondering a really basic question about how far to take enforcing a class's invariant. Maybe that's worded badly, so as an example, let's say that I want to write a class which stores a ...
I have an interesting constraint/invariant and I would love to hear people's input on how to maintain it. Big bonus if it can be ensured at compile time... I have the types below, and the following ...
I am aware that the concept of invariants exists across multiple programming paradigms. For example, loop invariants are relevant in OO, functional and procedural programming. However, one very ...
According to DDD-principles I use factory-methods to create consistent objects and to ensure that the objects are in the right state. Now I'm in doubt about inner logic of setter methods. I'm tied up ...
I have a bit of experience with loop invariants but I'm not really clear on them. I'm trying to learn them through an example in Python. Can someone point one out or help me understand? I've ...
I have an exam on Programming Concepts this Saturday and I am struggling to find some information to understand some concepts better. What is the difference between loop invariant and assertion? To ...
I understand 'invariant' in its literal sense. I also recognize them when I type code. But I don't think I understand the importance of this term in the context of computer science. Whenever I read ...
Ok not really sure if I'm right. I only recently learned that I needed to have contravariant interface to be able to pass that interface as a parameter in C# and this feature was only added in .NET ...
My main source of income is web development and through this I have come to enjoy the wonders of programming as my knowledge of different languages has increased over the years through work and ...
I'm reading Coders at Work, and in it there's a lot of talk about invariants. As far as I've understood it, an invariant is a condition which holds both before and after an expression. They're, among ...