are you sure you're not just seeing the result of the function call in
the repl? for example this:
(ns filter.core
(:require [clojure.string :as string])
(:gen-class))
(defn -main
[& args]
(loop []
(when-let [line (read-line)]
(println (string/upper-case line))
(recur))))
when run, produces:
$ echo -e 'foo\nbar\nbaz' | java -cp lib/*:filter-1.0.0-SNAPSHOT.jar filter.core
FOO
BAR
BAZ
$
On Fri, Dec 30, 2011 at 1:38 PM, Frank Siebenlist
<[email protected]> wrote:
> I'm trying to write some filters in clojure from stdin to stdout, but I have
> this nil at the end of the stream, which is what print returns.
>
> As an alternative, I can return strings, but then I have the surrounding "s.
>
> Or I could end by printing (symbol ""), like (do (print "hi")(symbol ""))
> which kind of gives me what I'm looking for but seems to include a newline at
> the end.
>
> Any other suggestions maybe?
>
> Thanks, Frank.
>
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