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Hey Carl and Richard @dotnetrocks.bsky.social, regarding your discussion with Steve Smith about how DRY can sometimes backfire, I think a better guideline is “maintain a single source of truth”. It’s often okay to repeat code, but it’s not so okay to repeat things that should be consistent.

8/5/25, 10:28 pm0 reposts1 like

Dan M

@devuxer.com

8 May 2025

One example is business logic. If you have multiple copies of logic that determines whether a user is authorized to see a particular piece of data, then requirements change, multiple copies must be located and edited to ensure correct behavior of the system, an error prone process.