diff --git a/wrapper.go b/wrapper.go
index 9ddf32c..097cd2c 100644
--- a/wrapper.go
+++ b/wrapper.go
@@ -185,6 +185,7 @@ func (s *State) toValueUnsafe(index int) (interface{}, error) {
 // Simple operations remain unchanged as they don't need stack protection
 
 func (s *State) GetType(index int) LuaType  { return LuaType(C.lua_type(s.L, C.int(index))) }
+func (s *State) IsString(index int) bool    { return s.GetType(index) == TypeString }
 func (s *State) IsFunction(index int) bool  { return s.GetType(index) == TypeFunction }
 func (s *State) IsTable(index int) bool     { return s.GetType(index) == TypeTable }
 func (s *State) ToBoolean(index int) bool   { return C.lua_toboolean(s.L, C.int(index)) != 0 }
@@ -207,6 +208,10 @@ func (s *State) PushString(str string) {
 	C.lua_pushstring(s.L, cstr)
 }
 
+func (s *State) Next(index int) bool {
+	return C.lua_next(s.L, C.int(index)) != 0
+}
+
 // Helper functions
 func bool2int(b bool) int {
 	if b {