diff --git a/helper/func.go b/helper/func.go
index 3db7e19..60c0f15 100644
--- a/helper/func.go
+++ b/helper/func.go
@@ -8,6 +8,7 @@ import (
 	str "github.com/fthvgb1/wp-go/helper/strings"
 	"net/url"
 	"os"
+	"path/filepath"
 	"reflect"
 	"strconv"
 	"strings"
@@ -208,3 +209,34 @@ func AsError[T any](err error) (T, bool) {
 	ok := errors.As(err, &v)
 	return v, ok
 }
+
+func IsDirExistAndMkdir(dir string, perm os.FileMode) error {
+	stat, err := os.Stat(dir)
+	if err != nil {
+		if !os.IsNotExist(err) {
+			return err
+		} else {
+			return os.MkdirAll(dir, perm)
+		}
+	}
+	if !stat.IsDir() {
+		return fmt.Errorf("%s is exist but not dir", dir)
+	}
+	return nil
+}
+
+func ReadDir(dir string) ([]string, error) {
+	fii, err := os.ReadDir(dir)
+	if err != nil {
+		return nil, err
+	}
+	var files []string
+	for _, entry := range fii {
+		name := entry.Name()
+		if name == "." || name == ".." {
+			continue
+		}
+		files = append(files, filepath.Join(dir, name))
+	}
+	return files, nil
+}
diff --git a/helper/slice/sort.go b/helper/slice/sort.go
index 646a877..8473889 100644
--- a/helper/slice/sort.go
+++ b/helper/slice/sort.go
@@ -27,7 +27,7 @@ func (r anyArr[T]) Less(i, j int) bool {
 	return r.fn(r.data[i], r.data[j])
 }
 
-// Sort fn i>j 为降序 desc，反之为升序 asc
+// Sort fn i>j desc ↓，i<j asc ↑
 func Sort[T any](arr []T, fn func(i, j T) bool) {
 	slice := anyArr[T]{
 		data: arr,
@@ -84,3 +84,16 @@ func SimpleSort[T any, O constraints.Ordered](a []T, order string, fn func(t T)
 	}
 	sort.Sort(slice)
 }
+
+func SimpleSorts[T constraints.Ordered](a []T, order string) {
+	slice := anyArr[T]{
+		data: a,
+		fn: func(i, j T) bool {
+			if order == DESC {
+				return i > j
+			}
+			return i < j
+		},
+	}
+	sort.Sort(slice)
+}