This is the poster child use case for "unless", IMHO. Anything else (at least for me) is more difficult to read, it's probably due to being exposed to all thos

This is the poster child use case for "unless", IMHO. Anything else (at least for me) is more difficult to read, it's probably due to being exposed to all thos other languages that do not have that syntactic construct. Using C syntax conditionals feels more natural to me, but again this is all opinionated.