Are you arguing about data representation in Perl vs OCaml? Of course there will be differences in data representation, and that would make your pattern matchin

Are you arguing about data representation in Perl vs OCaml? Of course there will be differences in data representation, and that would make your pattern matching also look slightly different. However, the examples in the article do fit very well familiar ML-style (SML, OCaml, Haskell, Rust, etc.) pattern matching.