diff --git a/default.inc b/default.inc
index 43c7b9b..9246837 100755
--- a/default.inc
+++ b/default.inc
@@ -26,6 +26,9 @@ containsElement () {
 	return 1
 }
 
+function join_by { local IFS="$1"; shift; echo "$*"; }
+
+
 if type apt &>/dev/null; then
 	ATYPE="apt"
 	if [ "$EUID" -ne 0 ]; then APTFUNC='sudo apt'