If the only thing you got from "Clean code" is Don't Repeat Yourself then I highly suggest reading it again. (IIRC the DRY principle comes from "The Pragmatic

If the only thing you got from "Clean code" is Don't Repeat Yourself then I highly suggest reading it again. (IIRC the DRY principle comes from "The Pragmatic Programmer" and not "Clean code", but it is referenced and is one of dozens of "clean" concepts.)