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UUIDs are 128 bit integers, encoded in a string. If you can support 128 integers, you’re fine. Otherwise, take UUIDs as a 36 letter ASCII string. If you have 64 bit integers but not 128 bit, you can a …

The expectation is that you can perform all the design needed. How much design you need depends on your experience and on the size and complexity of the task. … Having a design is no guarantee that the design works in the end, so be prepared to through the design out. Where you need planning ahead is when you have to agree on interfaces with colleagues. …

The only problem with this exact approach is that in languages like C++ DrivingSystem containing a Wheel means you have an instance of Wheel, and cannot have a subclass of Wheel. So in C++ you might p …

Some people say: Getters and setters are evil. The most common reason why they say that is because they heard someone state this with a lot of conviction. But as we all learnt, stating something with …

Do the work locally. Don’t read the whole 500MB at a time ob you, but maybe 10MB at a time. Make sure the client can resume a failed download, that makes everyone happier. That’s the cheapest way to i …

switch statements with an int value don’t allow the compiler to help you. But assume you use a library that provides an enum, then the compiler knows that all cases are covered, and a “default” case i …

What does your documentation say? I can't see any reason why you would treat null and a player outside your players list differently. If it's a bug, anyone calling it incorrectly won't handle your exc …

For class B, is the fact that it has a reference to a Person just an implementation detail, or is it part of the spec of class B that it should provide access to a Person object? That's the question …

One problem is that the standard recursive algorithm for the fibonacci function is just awfully bad, since the number of calls to calculate fib (n) is equal to fib (n) which is a very fast growing. So …

There is nothing wrong in principle. The question is: What do you want to achieve? JSON is perfect for transmitting data. If you send HTML instead and expect the client to extract the data from the …

In your case, "switch vs. polymorphism" is the wrong question. To a large degree, the only difference between various diseases seems to be the colour. So if you have information that depends on the co …

But refactoring may be done by throwing away some code and rewriting it from scratch, or doing small steps before a design is completely changed. …

There is one relationship: Code that is not readable is inflexible and hard to extend. It may in theory be flexible and extendible, but since it's not readable you won't be able to figure out how.

You want to allocate vehicles as near to the entrance as possible. I assume that each vehicle counts, so instead of allocating 4/1/1/1/1, you would prefer 1/1/1/1/4 which moves four vehicles to the fr …

Why are you doing logging? One reason is on the backend to have forensic evidence about attackers, we can ignore this. The other reason is to find hints what is going on if something goes wrong within …