In the world of software development, design patterns have long been touted as the foundation for writing reusable, scalable, and maintainable code. However, in his blog post “Rethinking Design Patterns,” Jeff Atwood, the founder of Stack Overflow, offers a criticizing look at the overuse and potential drawbacks of design patterns. Atwood argues that while design patterns can be incredibly helpful, they are often overused or misapplied, leading to unnecessary complexity and rigid software designs, highlighting that the key to good software design is not slavishly applying patterns but ensuring that the solution is simple, clear, and flexible
I chose this blog post because it directly relates to our course’s exploration of design patterns and software design principles. Throughout the course, we have discussed the value of design patterns as reusable solutions to common problems, but Atwood’s post reminded me that patterns should not be applied indiscriminately. The post offered a necessary counterpoint to the overwhelming focus on patterns, encouraging me to prioritize simplicity and clarity in code design. The Duck Simulator assignment in our course is a perfect example of how design patterns can either simplify or complicate a project, depending on how they’re applied. Initially, in the Duck Simulator, we began with a simple inheritance model where different types of ducks, such as MallardDuck and RubberDuck, inherited from a common Duck
class. While inheritance is a useful mechanism for shared behaviors, it quickly became clear that adding new duck types with unique behaviors (like the RubberDuck that doesn’t fly) led to a rigid structure that was difficult to modify.
This is something I’ve experienced in my own coding assignments: sometimes, I’ve reached for a design pattern without fully understanding the problem or whether the pattern was the best fit. For example, I have often used the Strategy Pattern when refactoring code, but I now realize that I may have overcomplicated simple problems that could have been solved with more straightforward solutions. Going forward, I plan to apply Atwood’s advice by being more discerning in my use of design patterns. Instead of immediately opting for a design pattern, I will first evaluate whether a simpler solution exists.
You can read the full post here: Rethinking Design Patterns.
From the blog SoftwareDiary by Oanh Nguyen and used with permission of the author. All other rights reserved by the author.