Clean Apex Code: Software Design for Salesforce Developers

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2025

P. GonzalezClean Apex Codehttps://doi.org/10.1007/979-8-8688-1411-2_3

3. Doing One Thing: Abstraction, Boolean Parameters, and Design Patterns

Pablo Gonzalez¹  

(1)

Dublin, Ireland

 

Functions should do one thing. They should do it well. They should do it only.

—Robert C. Martin

Common wisdom suggests that clean methods have two traits: they do one thing and they are short. However, these characteristics are merely the end result of various design principles. Applying these ideas without understanding the underlying principles won’t help you learn how to properly think about methods.

3.1 Why Should Methods Do One Thing

Before we define what “one thing” is, let’s ...