Add a shuffle utility

rowbot

@@ -97,6 +97,18 @@ any_file() {
   fi
 }
 
+shuffle() {
+  local idx=0 spot tmp
+  declare -n rowbot_array=$1
+
+  for (( ; idx < ${#rowbot_array[@]}; idx += 1 )); do
+    spot=$(random 0 "${#rowbot_array[@]}")
+    tmp=${rowbot_array[$idx]}
+    rowbot_array[$idx]=${rowbot_array[$spot]}
+    rowbot_array[$spot]=$tmp
+  done
+}
+
 # misc
 
 is_running () {