fix Pop method

slice.go

@@ -50,12 +50,12 @@ func (s Slice[T]) Pop(index int) Slice[T] {
 	if index == 0 {
 		return s[1:]
 	}
-	out := make(Slice[T], s.Len()-index)
+	out := make(Slice[T], 0, s.Len()-1)
 	for i, e := range s {
 		if i == index {
 			continue
 		}
-		out[i] = e
+		out = append(out, e)
 	}
 	return out
 }
@@ -132,12 +132,12 @@ func (s Set[T]) Pop(index int) Set[T] {
 	if index == 0 {
 		return s[1:]
 	}
-	out := make(Set[T], s.Len()-index)
+	out := make(Set[T], 0, s.Len()-1)
 	for i, e := range s {
 		if i == index {
 			continue
 		}
-		out[i] = e
+		out = append(out, e)
 	}
 	return out
 }