列舉提供簡單的方式來處理相關的常數集合。 列舉 (或 Enum) 是一組值的符號名稱。 系統會將列舉視為資料類型,您可以用來建立常數集合,以搭配變數和屬性使用。何時使用列舉類型每當程式接受一組有限的變數時,請考慮使用列舉。 列舉可讓您更清楚且更容易閱讀程式碼,特別是在使用有意義的名稱時。使用列...
Even if my colleague was confident that our classes were properly written, the assertions here would still be useful. New classes will be added that might fail to test for null, and this method can flag those bugs for us. In development, you should always turn assertions on, even if the...
I used scoped variables for fib2, but that's one more scenario where globals might be useful (pure mathematical functions which need to store data to avoid taking forever). programs used only once (eg for a contest), or when development time needs to be shortened globals are useful as typ...
Let’s pretend you are writing a kernel that operates on the many many pixels of some input image. Your kernel needs to substitute the pixels matching some key color with a replacement. You know the kernel could be faster if that key color and replacement color were constants, ...
this was the only thing I was doing, I chose to use unordered_map — which turned out to stab me in the back and lose me quite a bit of rating. Basically, my question is, during competitive programming, is there EVER a time in which I would want to use unordered_map instead of ...
points are effectively given less weight when they are far from the curve. When comparing models, the distance from the curve is not the same for each model. This means that robust methods might give a particular point a very high weight for one model and almost no weight for a different...
points are effectively given less weight when they are far from the curve. When comparing models, the distance from the curve is not the same for each model. This means that robust methods might give a particular point a very high weight for one model and almost no weight for a different...
notice the continued use of “delegates” throughout the SDK. The delegation pattern is not a pattern specific to iOS, but depending on what programming background you’ve had, it might not be immediately obvious as to what advantages this pattern provides, and why it seems to be used so ...
Last night I was reading about implementing my own stack. The example given pushes items on and off the stack at the start and end of each procedure (ie. in a std module). What's not so clear is how this would work with class objects. In this case do you
This way, you can make sure that code in master will almost always build without problems, and can be mostly used directly for releases (this might be overkill for some projects). Never push intodevelopormasterbranch. Make a Pull Request. ...