I think if all you are doing is reading files line by line, reading a database dataset etc, then your choice of language is probably irrelevant. Choose whatever you prefer typing.

But here's CLojres read a file line by line and print it out:

    C:\\foo.txt
    "THis is line 1
     This is line 2
     This is line 3"

     (with-open [rdr (io/reader "C:\\foo.txt")]
        (doall (map println (line-seq rdr))))
      =>THis is line 1
        This is line 2
        This is line 3

A simple function to read a specified file line by line

   (defn read-file-line-by-line [file-path]
      (with-open [rdr (io/reader file-path)]
         (doall (line-seq rdr))))

   (read-file-line-by-line "C:\\foo.txt")
   => ("THis is line 1" "This is line 2" "This is line 3")

To read the line by line and convert them to upper case

     (map clojure.string/upper-case (read-file-line-by-line "C:\\foo.txt"))
     => ("THIS IS LINE 1" "THIS IS LINE 2" "THIS IS LINE 3")