About Clean Code – Bug and Security

One of the components of the smooth operation of any application (in addition to stable servers, load balancing, and more) is clean code. However, is clean code possible in real life, or is it just a programmer’s dream? Where do vulnerabilities come from and how to avoid bugs?

Each programming language is designed with a different operating system, platform, coding style, and intended use in mind. We usually hear about the languages ​​Python, PHP, Ruby, JavaScript, Java, C, C ++ and C #, as well as more modern flavors such as Rust, Swift, Hack, and many others.

“Programming is the art of communicating to another person what he wants from a computer.” Donald Knuth

What is Clean Code?

When it comes to clean code, we present perfectly thought-out strings. This is the code that was planned out before it was written. So well planned that it works flawlessly and flawlessly on first launch.

However, real programming is much more difficult:

No matter what you do, mistakes are hard to avoid. Doubt about your own fitness continues to grow, and a mistake that you thought would take five minutes to fix ultimately takes hours. In addition, the function you were about to implement turned into a major problem for the project.

In this case, it is important to keep in mind that it is impossible to write perfect code right away. This requires many hours of deliberation and detailed planning. Here, everyone chooses for himself what is more priority: writing clean code or speed of work.

Code Objectivity

Clean code is objectively good code. It is written as succinctly and elegantly as possible, without duplication. It is structured to be easy to read by both humans and computers. Anyone can write computer-readable code, but only a good programmer can write human-readable code.

Sloppy code is expensive and time consuming and effortful to maintain. In addition, the code is more prone to errors that can cause the program to crash.

It should be understood that clean code is a product of collaboration, where everyone on the team needs to understand the code. This optimizes work in the event of a change in the composition of the team and greatly simplifies refactoring and debugging.

Basic concepts

Refactoring is the process of optimizing a program code without changing its external behavior in order to improve performance, readability, testability, or maintainability. Basically, with refactoring, you improve the design of the code after it has been written.

Debugging is fixing bugs in your code.

However, even clean code has an expiration date. Software and computing exist in a rapidly changing landscape. Code that used to be clean is deprecated.

Basic concepts
Deprecated code is code that is not maintained or updated, but is used. It works or not, and no one understands why. The older the code in your codebase, the harder it is to understand, no matter how well written it is.

As a result, while the codebase may be clean from the outset, the need to scale, change, and new requirements can lead to contamination.

Criteria by which the code can be considered clean:

No code redundancy
The code must comply with the DRY (Don’t repeat yourself) rule. This means that any change in one area should not require changes in others.

Minimum dependencies
If your code has many dependencies, it is more difficult to maintain or change in the future.

Minimum extensions
The code should contain a minimum number of both classes (templates for creating objects that provide initial values ​​for states) and methods (functions or procedures belonging to a particular class or object.

Functionality and code readability
The code should be simple, convenient and understandable so that any developer can quickly read it. To do this, many developers use the KISS (keep it simple and straightforward) and YAGNI (You aren’t gonna need it) rules.

Code analysis
Use language static analysis tools to inspect your code.

Code quality and safety
The high quality of the software does not in itself imply that the software is secure. The absence of vulnerabilities in the code is still not a mandatory requirement for most development companies.

Why is security fading into the background?
In the development world today, functionality and speed outweigh safety. Enterprises cannot stay ahead of the competition without creating and releasing new features in a short time frame.

Security is not a competitive differentiator: Consumers don’t think about security when using an app or buying a smart device, be it a smart thermostat or a light bulb. Recall an incident from 2020 when a drone was able to hack smart light bulbs

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