I agree – having read the intro and skimmed some other sections, they seem like great foundational introductions and I'm absolutely excited to use perl instead

I agree – having read the intro and skimmed some other sections, they seem like great foundational introductions and I'm absolutely excited to use perl instead of GNU-like utilities... but I'm very nervous that I wouldn't be able to quickly find how to do it with perl later. An additional "problems to solve with a perl one-liner" index of some kind might be quite helpful for that...