ls : Add private _ls_dir and _ls_file.

.config/bash/module/ls.sh

@@ -52,3 +52,13 @@ function la() {
 function lla() {
 	ls -lAhtr --si -- "$@"
 }
+
+# List only files.
+function _ls_file() {
+	ls --classify | grep -v \/$
+}
+
+# List only dirs.
+function _ls_dir() {
+	ls --classify | grep \/$ | sed -e "s/\/$//"
+}