DRY Often Makes Your Code Worse
ArjanCodes
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In this video, I show how a “clean” DRY refactor can actually make your code worse. Instead of improving the design, it introduces hidden complexity, confusing flags, and harder-to-understand behavior. Then we refactor it again, this time focusing on behavior and responsibilities, not just code shape.
???? GitHub Repository: https://git.arjan.codes/2026/dry.
???? ArjanCodes Courses: https://www.arjancodes.com/courses.
???? Join my Discord server: https://discord.arjan.codes.
⌨️ Keyboard I’m using: https://amzn.to/49YM97v.
???? Chapters:
0:00 Intro
0:30 The Bad Refactor First
3:58 What This Teaches About DRY
4:48 A Better Refactor
10:24 Some Duplication Is Actually Good
11:21 Quick Guidelines
12:36 Final Thoughts
#arjancodes #softwaredesign #python
In this video, I show how a “clean” DRY refactor can actually make your code worse. Instead of improving the design, it introduces hidden complexity, confusing flags, and harder-to-understand behavior. Then we refactor it again, this time focusing on behavior and responsibilities, not just code shape.
???? GitHub Repository: https://git.arjan.codes/2026/dry.
???? ArjanCodes Courses: https://www.arjancodes.com/courses.
???? Join my Discord server: https://discord.arjan.codes.
⌨️ Keyboard I’m using: https://amzn.to/49YM97v.
???? Chapters:
0:00 Intro
0:30 The Bad Refactor First
3:58 What This Teaches About DRY
4:48 A Better Refactor
10:24 Some Duplication Is Actually Good
11:21 Quick Guidelines
12:36 Final Thoughts
#arjancodes #softwaredesign #python
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