On Wed, May 24, 2017 at 10:19 AM Jean-Christophe Helary <jean.christophe.helary@gmail.com> wrote:

I just realized today that concat did not come with optional separators (unlike mapconcat). Is there a reason for that ?

I just using mapconcat when I feel that need:

Example:

(mapconcat #'identity '("a" "b" "c") "|") => "a|b|c"