Add common.ReverseMap

SagerNet · Nov 12, 2024 · 703d4ff · 703d4ff
1 parent 57af72d
commit 703d4ff
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/common/cond.go b/common/cond.go
@@ -268,6 +268,14 @@ func Reverse[T any](arr []T) []T {
 	return arr
 }
 
+func ReverseMap[K comparable, V comparable](m map[K]V) map[V]K {
+	ret := make(map[V]K, len(m))
+	for k, v := range m {
+		ret[v] = k
+	}
+	return ret
+}
+
 func Done(ctx context.Context) bool {
 	select {
 	case <-ctx.Done():