Talking about Code Quality-Preface to "How to Improve Front-end Code Quality"

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code quality is very important to companies and individuals. But there are many ways to improve the code. When time and resources are limited, what should we do? And what is the order of doing it?

Code quality is important to companies and individuals.

For the company, the company expects high-quality products. The quality of the code will directly reflect the quality of the product. Poor code quality often leads to poor product quality. At the same time, the company expects to develop products quickly. The code quality is good, which is conducive to improving the development speed. On the contrary, changing the code with poor quality is like moving the building blocks in the precarious Lego building without falling apart.

For individuals, code quality is a manifestation of programmers' professional capabilities. Being able to write high-quality code will help you find a good job, get a promotion and raise your salary.

Therefore, we all expect to improve code quality.

improve code quality
There are many ways to improve code quality, such as:

1. Unify the code style.
2. Give meaningful names to files, classes, functions, variables, etc.
3. Add notes where necessary.
4. Reasonable use of programming methodology. DDD (Domain Driven Design), object-oriented programming, functional programming.
5. Reasonable use of design principles and design patterns.
6. Write test cases.
7. Continuous integration.
8. Code scanning.
9.Code Review。
10. Pair programming.
11. Choose high-quality third-party libraries.
12....
With so many methods, with limited time and resources, what should we do? And what is the order of doing them?

The order of improving code quality
The series of articles "How to learn and copy to improve the quality of front-end code" is the answer to the above questions.

Code quality consists of 3 parts:

1. realizes the business function .
2. code readability .
3. code complexity .

High-quality code first achieves business functions, then has good readability, and finally, the complexity of the code is controlled within an acceptable range. Methods to improve code quality can be classified into these three parts. Based on these 3 parts, this series of articles divides the code quality from bad to good into 5 stages. As shown below:

To improve code quality, you should do it from the lower level to the upper level.

The value of code lies in the realization of business functions. Code that cannot implement business functions is worthless no matter how well written. Therefore, the code must first implement business functions.

Reading the code is a high-frequency operation. Every time before changing the code, the code will be read. At the same time, the cost of improving the readability of the code is not very high. From the perspective of input and output, improving code readability is cost-effective.

Finally, it is to reduce the complexity of the code. To reduce the complexity of the code, it takes a lot of time to do research and design, and often take some detours. Reducing the complexity of complex systems is a challenge for teams and individuals. Therefore, put this piece to the end.

The article will introduce in detail the characteristics of each stage and how to achieve it.

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