Merge pull request #124 from icey-yu/shuffle-slice

feat: shuffleSlice

utils/datautil/datautil.go

@@ -19,8 +19,10 @@ import (
 	"github.com/openimsdk/tools/db/pagination"
 	"github.com/openimsdk/tools/errs"
 	"github.com/openimsdk/tools/utils/jsonutil"
+	"math/rand"
 	"reflect"
 	"sort"
+	"time"
 )
 
 // SliceSubFuncs returns elements in slice a that are not present in slice b (a - b) and remove duplicates.
@@ -697,6 +699,15 @@ func CopySlice[T any](a []T) []T {
 	return ns
 }
 
+func ShuffleSlice[T any](a []T) []T {
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	shuffled := CopySlice(a)
+	r.Shuffle(len(shuffled), func(i, j int) {
+		shuffled[i], shuffled[j] = shuffled[j], shuffled[i]
+	})
+	return shuffled
+}
+
 func GetElemByIndex(array []int, index int) (int, error) {
 	if index < 0 || index >= len(array) {
 		return 0, errs.New("index out of range", "index", index, "array", array).Wrap()