Reflection is just a mechanism to examine the type and value pair stored inside an interface variable. To get started, there are two types we need to know about in package reflect: Type and Value. Those two types give access to the contents of an interface variable, and two simple functions, called reflect.TypeOf and reflect.ValueOf, retrieve reflect.Type and reflect.Value pieces out of an interface value.
A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory.[1] A cache is a smaller, faster memory, located closer to a processor core, which stores copies of the data from frequently used main memory locations. Most CPUs have a hierarchy of multiple cache levels (L1, L2, often L3, and rarely even L4), with separate instruction-specific and data-specific caches at level 1.
...Decorator design pattern is a structural design pattern. It lets you provide additional functionality or decorates an object without altering that object.
换言之，客户端并不会觉得对象在装饰前和装饰后有什么不同。装饰器模式可以在不需要创造更多子类的情况下，将对象的功能加以扩展。这就是装饰器模式的模式动机。
Refer to https://swsmile.info/post/design-pattern-decorator/ for Decorator Pattern.
...Observer Design Pattern is a behavioral design pattern. This pattern allows an instance (called subject) to publish events to other multiple instances (called observers). These observers subscribe to the subject and hence get notified by events in case of any change happening in the subject.
Refer to https://swsmile.info/post/design-pattern-observer-pattern/ for Observer Pattern
...Proxy Design Pattern is a structural design pattern. This pattern suggests providing an extra layer of indirection for controlled and intelligent access to the main object.
In this pattern, a new proxy class is created that implements the same interface as the main object. This lets you execute some behavior before the actual logic of the main object. Let’s understand it more with an example:
A web server such as Nginx can act as a proxy for your application server. It provides
See https://swsmile.info/post/design-pattern-proxy/ for Proxy Pattern.
...Let’s try to understand the Composite pattern with an example of an operating system’s file system. In the file system, there are two types of objects: files and folders. There are cases when files and folders should be treated to be the same way. This is where the Composite pattern comes in handy.
Imagine that you need to run a search for a particular keyword in your file system. This search operation applies to both files and folders. For a file, it will just look into the contents of the file; for a folder, it will go through all files of that folder to find that keyword.
– In our example above of the file system, let’s say search operation of a particular keyword needs to be executed. Now, this search operation applies to both File and Folder. For a File, it will just look into the contents of the file and for a Folder, it will go through all files in the hierarchy in that folder to find that keyword
– In our example, File and Folder do form a tree structure
Refer to https://swsmile.info/post/design-pattern-composite-pattern/ for Composite pattern.
...