I'm going to repeat myself, why are people upvoting this? It's an LLM generated book, and not even decent. It's pages and pages of code listings with little or no explanations. It's also wrong at various points.

Perl is weakly typed, for instance, not strongly typed no matter what Claude tells you. Try "1" + 1 and ask yourself if that result makes any sense in a strongly typed language.

https://news.ycombinator.com/item?id=45242075

Gotta go with Jtsummers’ comment. This looks like it was written by an LLM and contains many, many factual errors.

It does not appear to have any relation to the O’Reilly book of the same name.

I recommend people flag this submission. Check out something like the Modern Perl book by chromatic instead.

https://www.onyxneon.com/books/modern_perl/index.html

I wrote the book Modern Perl by hand, and it's accurate and freely available. I wonder how much of the linked book relies on what I already wrote:

https://www.modernperlbooks.com/books/modern_perl_2016/