New article: Which of these languages are best for AI? blog.ploeh.dk/2026/03/09/w...

#repostfriday Keeping cross-cutting concerns out of application code. blog.ploeh.dk/2024/09/02/k...

Worth mulling over: www.rockoder.com/beyondthecod...

Other readers are showing their appreciation of ploeh blog by supporting it. You, too, can do that. blog.ploeh.dk/support

New article: In defence of correctness. blog.ploeh.dk/2026/03/03/i...

#repostfriday Should interfaces be asynchronous? blog.ploeh.dk/2024/07/08/s...

New article: TDD as induction. blog.ploeh.dk/2026/02/23/t...

#repostfriday Gratification blog.ploeh.dk/2024/05/13/g...

my unpopular opinion on AI and tests: blog.ladeak.net/posts/ai-uni...

New article: Critiquing tests. blog.ploeh.dk/2026/02/16/c...

#repostfriday Do ORMs reduce the need for mapping? blog.ploeh.dk/2023/09/18/d...

New article: Simplifying assertions with lenses. blog.ploeh.dk/2026/02/09/s...

#repostfriday Test-driving the pyramid's top. blog.ploeh.dk/2023/07/31/t...

Unpopular(?) opinion: Marker interfaces are code smells.

Other readers are showing their appreciation of ploeh blog by supporting it. You, too, can do that. blog.ploeh.dk/support

New article: Code that fits in a context window. blog.ploeh.dk/2026/02/02/c...

#repostfriday Works on most machines. blog.ploeh.dk/2023/07/17/w...

Some thoughts about the (far?) future use of AGI for programming. My 2024 IT Days keynote "There's no Voight-Kampff test": youtu.be/X_SsnmZ4Dlc?...

New article: AI-generated tests as ceremony. blog.ploeh.dk/2026/01/26/a...

#repostfriday When is an implementation detail an implementation detail? blog.ploeh.dk/2023/06/19/w...

New article: Filtering as domain logic. blog.ploeh.dk/2026/01/19/f...

I still get a chuckle out of this example. #repostfriday AI for doc comments. blog.ploeh.dk/2023/07/10/a...

New article: Two regimes of Git. blog.ploeh.dk/2026/01/12/t...

#repostfriday Favour flat code file folders. blog.ploeh.dk/2023/05/29/f...

Happy new year. Over two incarnations, ploeh blog is now 20 years old and sports 946 articles. A few kind souls find it useful enough to sponsor it. You can join them: blog.ploeh.dk/support

On this date, twenty years ago, I published my first blog post on the now-defunct MSDN blog. Still, it counts as an anniversary of sorts, I think. learn.microsoft.com/en-us/archiv...

New article: Coupling from a big-O perspective. blog.ploeh.dk/2026/01/05/c...

New article: Git integration is ten years away. blog.ploeh.dk/2025/12/29/g...

#repostfriday Fit URLs. blog.ploeh.dk/2020/10/26/f...

New article: Test-specific Eq. blog.ploeh.dk/2025/12/22/t...

"System.ArgumentException: Parameter is not valid." Gee, thanks. Which parameter? What was the value? What constitutes a valid value? Please write better exception messages. blog.ploeh.dk/2014/12/23/e...

#repostfriday Confidence from Facade Tests. blog.ploeh.dk/2023/03/13/c...

New article: Tautological assertions are not always caused by aliasing. blog.ploeh.dk/2025/12/15/t...

#repostfriday In the long run. blog.ploeh.dk/2023/01/16/i...

TIL that it's possible to yield from within #fsharp lists: > [yield 1; yield! [2;3]; yield 4];; val it: int list = [1; 2; 3; 4]

New article: Pattern guards for a protocol. blog.ploeh.dk/2025/12/08/p...

#repostfriday Decouple to delete. blog.ploeh.dk/2022/11/21/d...

Other readers are showing their appreciation of ploeh blog by supporting it. You, too, can do that. blog.ploeh.dk/support

New article: Treat test code like production code. blog.ploeh.dk/2025/12/01/t...

#repostfriday TDD improves reusability. blog.ploeh.dk/2011/11/10/T...

New article: Result is the most boring sum type. blog.ploeh.dk/2025/11/24/r...

#repostfriday Modelling versus shaping reality. blog.ploeh.dk/2020/05/18/m...

New article: Empirical software prototyping. blog.ploeh.dk/2025/11/17/e...

New article: 100% coverage is not that trivial. blog.ploeh.dk/2025/11/10/1...

'Paratechnical power user'. Nice phrase coinage. Well done, 2023-me! #repostfriday blog.ploeh.dk/2023/10/23/d...

Other readers are showing their appreciation of ploeh blog by supporting it. You, too, can do that. blog.ploeh.dk/support

New article: Empirical Characterization Testing. blog.ploeh.dk/2025/11/03/e...

I'm almost afraid to jinx it, but I've been writing non-trivial Haskell in @vscode.dev all week, and been impressed with how stable and useful it's become of late 👍👌 marketplace.visualstudio.com/items?itemNa...

#repostfriday When to refactor: blog.ploeh.dk/2022/09/19/w...

TIL how to FOCUS the Visual Studio Code hover window. I've long known that Ctrl+k,Ctrl+i shows hover information (e.g. type, documentation), but this hover window sometimes contains so much text that you have to scroll it. How to do that without the mouse? Press Ctrl+k,Ctrl+i again!