I'm a big proponent for the "rule of [at least] three" for building DRY abstractions: once is YAGNI (you aren't going to need it), twice is coincidence, three i

I'm a big proponent for the "rule of [at least] three" for building DRY abstractions: once is YAGNI (you aren't going to need it), twice is coincidence, three is finally a pattern emerging.