How to understand the web Decoration Mode

This article mainly explains the "web decoration mode how to understand", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "web decoration mode how to understand" it!

Intention

On the premise of keeping the original interface unchanged, dynamically add functions to the class.

motivation

There are many ways to dynamically adjust the functionality of a class. One is substitution, for example, the bridging pattern can change the specific implementation by replacing the implementation class object. Another way is to stack, that is, to accomplish a task in multiple steps.

The simplest example is cooking: first refueling, then chopped onions, then sliced meat, green vegetables, finally salt, chicken essence, etc. Of course, some people will also add chili, big ingredients and so on, which is no problem.

The process of cooking has the following characteristics, which is the key point.

Each step is independent of each other, and the object of operation is the food in the pot.

The selection of steps is dynamic, each step is optional, and the order can change.

Each step is to just do your own thing, regardless of whether other steps exist or not.

The dishes in the pot will gradually change with each step until they are finished.

This process may be a little too approachable, so take a look at the examples in software development:

The image processing process can be regarded as a combination of whitening balance, noise reduction, sharpening, chromaticity, cutting and rotation processing.

The processing of network transmission data can be regarded as a combination of check, encryption, compression and so on.

The installation process in the form of Wizard, the parameter setting process can be divided into a combination of multiple steps, etc.

Draw the key points

Basically, as long as it is to deal with data or transactions in stages, they all have the characteristics of cooking more or less.

Thank you for your reading, the above is the content of "how to understand web decoration mode". After the study of this article, I believe you have a deeper understanding of how to understand web decoration mode, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!