Clean code is readable, reusable, and extensible. Writing clean code is an essential part of a development team, as it helps other developers read and understand the code. Though clean code takes more time in the short term, it can save developers time, effort, and money in the long run.
One of the principles of clean coding is the separation of concerns. Rather than having a single generic interface for all modules, a class should implement several smaller interfaces. Large amounts of functionality should be separated into separate categories. The idea of separation is to make it easier to read and maintain code.
Secondly, it is crucial to enclose variables and functions in a readable way. This makes testing easier. For example, a part that takes more than three arguments should have a test case for each of the three arguments. Otherwise, it is breaking the Single Responsibility Principle.
Camel case variable & function names
When naming variables and functions, keep them short and indicate the data type. For example, count, length, or size suggest a number data type, and the name sounds like a string. Similarly, you should avoid using single-character variable names, except in the case of loops. Likewise, you should also prevent naming functions in a meaningless way and always use a verb as the first word. Standard conventions are described in the table below.
Keeping code readable
Making code readable is easier than you think. You can follow some tips to ensure your code is easily readable. A code review is an excellent way to see whether your code is readable. It can also show you any misunderstandings. Testing your code with a friend before publishing it is also a good idea.
Code that is not readable can go unnoticed for a long time. Unless a developer notices it, the code will remain silent in the codebase, awaiting a moment when another developer tries to understand it. This could happen when a developer tries to update an existing system or add a new feature. Unreadable code is hard to maintain and rewrite and can lead to errors.
Avoid using callbacks and promises if you want to keep your code readable. These constructs are more legible than you’d like and are not recommended for beginners. Instead, try to use async/await. This construct is helpful for beginners and people from other languages. However, it is crucial to understand the concept behind it.
Another important tip is to avoid nested code. This will make it easier to read the code. Try using const instead of var to avoid using invalid reassignments. A linter can help you find bugs in your code. This is a much shorter solution than the previous one.
When using closures, make sure to use brackets. If you use braces, the compiler will recognize that the statement is a block. Braces are also necessary for all control structures.
Common pitfalls of writing clean code
First of all, clean code makes onboarding new team members easier. You will not have to spend precious time explaining each line of code to them. Writing clean code is a bit more work, but it’s much more efficient than fixing sloppy code.