clojure :dependencies [[org.clojure/clojure "1.10.1"] [com.opencsv/opencsv "5.5"]] clojure (ns my-csv.core (:import [com.opencsv.CSVReader CSVWriter])) (defn read-csv [csv-file] (with-open [reader (CSVReader. (clojure.java.io/reader csv-file))] (doall (mapv vec (.readAll reader))))) (defn write-csv [csv-file data] (with-open [writer (CSVWriter. (clojure.java.io/writer csv-file))] (doseq [row data] (.writeNext writer (into-array String row))))) clojure (def data (read-csv "data.csv")) (pprint data) (def new-data [["Name" "Age" "City"] ["Alice" "25" "Beijing"] ["Bob" "30" "Shanghai"] ["Charlie" "35" "Guangzhou"]]) (write-csv "new-data.csv" new-data)