很多初学者喜欢用全局变量，因为这比函数的参数传来传去更容易让人理解。确实在很多场景下用全局变量很方便。不过如果代码规模增大，并且有多个文件的时候，全局变量就会变得比较混乱。你可能不知道在哪个文件中定义了相同类型甚至重名的全局变量，也不知道这个变量在程序的某个地方被做了怎样的操作。因此对于这种情况，有 ...

Design patterns are solutions to recurring problems and complexities in software design and are classified into three distinct categories: creational, structural, and behavioral. While creational ...

Learn the drawbacks of using the Singleton design pattern, one of the most widely used design patterns, and the alternatives to avoid its potential pitfalls Although design patterns are solutions to ...