Author here, thank you for the comment, you're right in the latest code I replaced it with clojure.data.csv but for the article I kept it that way to show that

Author here, thank you for the comment, you're right in the latest code I replaced it with clojure.data.csv but for the article I kept it that way to show that you don't need dependencies for such little utilities, split, map and zipmap and we're done.