Wallace Wang - Pro iPhone Development with SwiftUI: Design and Manage Top Quality Apps

Wallace Wang

Pro iPhone Development with SwiftUI

Design and Manage Top Quality Apps

3rd ed.

Logo of the publisher

Any source code or other supplementary material referenced by the author in this book is available to readers on GitHub: https://github.com/Apress/Pro-iPhone-Development-with-SwiftUI. For more detailed information, please visit http://www.apress.com/source-code.

Programs are rewritten and modified far more often than they are ever created. That means most of the time developers must change and modify existing code either written by someone else or written by you sometime in the past. Since you may be writing code that you or someone else will eventually modify in the future, you need to make sure you organize your code to make it easy to understand.

While every developer has their own programming style and no two programmers will write the exact same code, programming involves writing code that works and writing code thats easy to understand.

Writing code that works is hard. Unfortunately, once developers get their code to work, they rarely clean it up and optimize it. The end result is a confusing mix of code that works but isnt easy to understand. To modify that code, someone has to decipher how it works and then rewrite that code to make it cleaner to read while still working as well as the original code. Since this takes time and doesnt add any new features, its often ignored.

When writing code, focus on clarity and readability. Its possible to write code that works but is hard to understand. That makes modifying that code difficult. Many times, it can be easier to rewrite code from scratch rather than waste time trying to figure out how it works.

Just as variable and constant names can be too short, they can also be too long. Ideally, use descriptive names that get their meaning across using as few words and characters as possible.