💡 Learn how to design great software in 7 steps: https://arjan.codes/designguide.
Writing code, especially in larger software projects can be very challenging. In this video, I'm going to cover cohesion and coupling to help you write better code. I'll go through a Python program in detail and I'll show you how to write code that has low coupling and strong cohesion. Coupling and Cohesion are part of the GRASP principles of object-oriented design, as proposed by Craig Larman in his book (see below for a link).
Here are a few books about software design that might interest you:
- Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and Iterative Development, by Craig Larman: https://amzn.to/364wgLb
- Design Patterns: Elements of Reusable Object-Oriented Software, by the Gang of Four: https://amzn.to/39451Cv
🎓 ArjanCodes Courses: https://www.arjancodes.com/courses/
You can find the code I worked on in this episode in my GitHub repository: https://github.com/arjancodes/betterpython
All parts in this series:
Part 1: Cohesion and coupling - https://youtu.be/eiDyK_ofPPM
Part 2: Dependency inversion - https://youtu.be/Kv5jhbSkqLE
Part 3: The strategy pattern - https://youtu.be/WQ8bNdxREHU
Part 4: The observer pattern - https://youtu.be/oNalXg67XEE
Part 5: Unit testing and code coverage - https://youtu.be/jmP3fp_BhmE
Part 6: Template method and bridge - https://youtu.be/t0mCrXHsLbI
Part 7: Exception handling - https://youtu.be/ZsvftkbbrR0
Part 7b: Monadic error handling - https://youtu.be/J-HWmoTKhC8
Part 8: Software architecture - https://youtu.be/ihtIcGkTFBU
Part 9: SOLID principles - https://youtu.be/pTB30aXS77U
Part 10: Object creation patterns - https://youtu.be/Rm4JP7JfsKY
Chapters:
0:00 Introduction
0:47 What is cohesion?
1:37 What is coupling?
3:59 Code example intro
6:39 Analyzing the code
7:56 Information expert
11:19 Reducing coupling
16:32 Improving cohesion
22:40 Recap
25:37 Outro
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