Be CAREFUL With Removing Code Duplication | Issue #24


Hi there,

Ever struggled with code duplication? It can creep into your projects in ways you’d never expect. 🚨

In this week’s video, I’ll show you some tricky examples of duplicated code that might not be obvious at first glance. 👀 I also explain why simply following the DRY principle can sometimes make things worse.

I’ll walk you through a refactor of one such case and even show you an example where not removing duplication is the better choice!

Watch until the end of the video for some BONUS tips on how to avoid writing duplicate code without turning your project into a mess of confusing abstractions.

Enjoy the video and happy coding!

Cheers,

Arjan

# News

Simplified Payments for ArjanCodes Courses

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Free Threaded Python With Asyncio

Free-threaded Python removes the Global Interpreter Lock (GIL), making true multithreading possible! 🧵

Jamie Chang’s recent article digs into how this update lets you run both CPU-bound and IO-bound tasks using AsyncIO. He gives a practical example with asyncio.to_thread() and shows off some nice performance gains on a MacBook M3.

Still scratching your head about the GIL? Check out my video for a full breakdown, or dive into my thoughts on Python 3.13 right here.

# Community

A community member recently shared a video on Primitive Obsession—an OOP code smell—sparking an interesting debate around the use of value objects to resolve it.

Some find the approach helpful, while others see it as a polarizing topic, with lots of strong opinions on both sides.

Want to jump into the conversation? Join our Discord to read the full thread and share your thoughts! 💬👇


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Jan van Eijklaan 2-4, Bilthoven, UT 3723 BC

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