re: Is “Defensive Programming” actually healthy? VIEW POST

re: Every professional software deliverer has the responsibility to consider the implications of what they’re doing and when. Defensive programming i...

I really like your thought process on this. Though I just want to make sure I understand you correctly: Are you saying that YAGNI is not a reasonable argument against clean code techniques like the never/exhaustiveness checking I showed above?

If so, I agree with you because it helps to keep the codebase clean, and as you said:

A clean codebase is the ultimate defence kit against these costs.

Well put. :)


Yes. As Martin Fowler puts it:

“Yagni only applies to capabilities built into the software to support a presumptive feature, it does not apply to effort to make the software easier to modify.”

Wow. That’s an incredible quote. Thank you so much for making me aware of it. :)

Here’s the reference along with a discussion of the cost considerations behind YAGNI


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