Five lines of code. Robert Martin recommends

Every codebase has mistakes and weak spots that need to be found and fixed. Proper refactoring will make your code elegant, easy to read, and simple to maintain.
Get acquainted with a unique approach that allows you to implement any method... in five lines of code. And don’t forget the secret well-known to most senior developers: sometimes it’s easier to make the code worse and come back to fix it later.
"Five lines of code" is a fresh perspective on refactoring for developers of any level. You will learn when to perform refactoring, how to use patterns, and also learn to identify signs that indicate the code needs to be removed

For developers of all levels. The examples use accessible and understandable TypeScript syntax that allows you to transition to any high-level language.