diff --git a/tests/array.tengo b/tests/array.tengo
new file mode 100644
index 0000000..bac2c2e
--- /dev/null
+++ b/tests/array.tengo
@@ -0,0 +1,22 @@
+enum := import("enumx")
+fmt := import("log")
+
+object := {
+	key1: "cock",
+	key2: "dick",
+	key3: "check",
+	key4: "die",
+	key5: "wasd"
+}
+keys := enum.keys(object)
+values := enum.values(object)
+
+sorted_values := enum.sort(values, func(a, b){
+	return b < a
+})
+
+ia := [5, 100, 531, 7537, 1, 2, -100, 1.535]
+fmt.println(enum.sort(ia))
+fmt.println(sorted_values)
+
+
diff --git a/xmodules/enumx/main.go b/xmodules/enumx/main.go
new file mode 100644
index 0000000..fd10348
--- /dev/null
+++ b/xmodules/enumx/main.go
@@ -0,0 +1,69 @@
+package enumx
+
+import "github.com/d5/tengo/v2"
+
+const src = `
+
+_swap := func(arr, left, right) {
+	if arr == undefined || len(arr) <= 1 || left < 0 || left >= len(arr) || right < 0 || right >= len(arr) || left >= right {
+		return
+	}
+	temp := arr[right]
+	arr[right] = arr[left]
+	arr[left] = temp
+}
+
+_sort := func(arr, left, right, less) {
+	if arr == undefined || len(arr) <= 1 || left < 0 || left >= len(arr) || right < 0 || right >= len(arr) || left >= right {
+		return arr
+	}
+	idx := left
+	for i := left; i < right; i++ {
+		if less(arr[i], arr[right]) {
+			_swap(arr, idx, i)
+			idx++
+		}
+	}
+	_swap(arr, idx, right)
+	_sort(arr, left, idx-1, less)
+	_sort(arr, idx+1, right, less)
+	return arr
+}
+
+export {
+	keys: func(x){
+		ret := []
+		for k, _ in x {
+			ret += [k]
+		}
+		return ret
+	},
+	values: func(x){
+		ret := []
+		for _, v in x {
+			ret += [v]
+		}
+		return ret
+	},
+	sort: func(arr, ...less) {
+		if !less {
+			less = func(a, b){
+				return a < b
+			}
+		} else {
+			less = less[0]
+		}
+		if arr == undefined || len(arr) <= 1 {
+			return arr
+		}
+		return _sort(arr, 0, len(arr)-1, less)
+	}
+}
+
+`
+
+func GetModule() tengo.Importable {
+	return &tengo.SourceModule{
+		Src: []byte(src),
+	}
+}
diff --git a/xmodules/logx/main.go b/xmodules/logx/main.go
index 0aac329..a0a06f4 100644
--- a/xmodules/logx/main.go
+++ b/xmodules/logx/main.go
@@ -25,12 +25,16 @@ var Module = map[string]tengo.Object{
 				}
 			}
 
-			v := make([]any, len(args[1:]))
+			/*v := make([]any, len(args[1:]))
 			for i, o := range args[1:] {
 				v[i] = tengo.ToInterface(o)
-			}
+			}*/
 
-			log.Printf(format, v...)
+			str, err := tengo.Format(format, args...)
+			if err != nil {
+				return nil, err
+			}
+			log.Print(str)
 
 			return nil, nil
 		},
@@ -42,7 +46,11 @@ var Module = map[string]tengo.Object{
 		) (tengo.Object, error){
 			v := make([]any, len(args))
 			for i, o := range args {
-				v[i] = tengo.ToInterface(o)
+				var ok bool
+				v[i], ok = tengo.ToString(o)
+				if !ok {
+					v[i] = tengo.Undefined{}
+				}
 			}
 			log.Print(v...)
 			return nil, nil
@@ -55,7 +63,11 @@ var Module = map[string]tengo.Object{
 		) (tengo.Object, error){
 			v := make([]any, len(args))
 			for i, o := range args {
-				v[i] = tengo.ToInterface(o)
+				var ok bool
+				v[i], ok = tengo.ToString(o)
+				if !ok {
+					v[i] = tengo.Undefined{}
+				}
 			}
 			log.Println(v...)
 			return nil, nil
diff --git a/xmodules/modules.go b/xmodules/modules.go
index 640379e..3a7b230 100644
--- a/xmodules/modules.go
+++ b/xmodules/modules.go
@@ -7,6 +7,7 @@ import "surdeus.su/core/xgo/xmodules/paths"
 import "surdeus.su/core/xgo/xmodules/httpx"
 import "surdeus.su/core/xgo/xmodules/htmlx"
 import "surdeus.su/core/xgo/xmodules/objects"
+import "surdeus.su/core/xgo/xmodules/enumx"
 import "github.com/d5/tengo/v2"
 
 // The main map to import all the implemented modules.
@@ -18,5 +19,6 @@ func GetModules() *tengo.ModuleMap {
 	ret.AddBuiltinModule("http", httpx.Module)
 	ret.AddBuiltinModule("html", htmlx.Module)
 	ret.Add("objects", objects.GetModule())
+	ret.Add("enumx", enumx.GetModule())
 	return ret
 }
diff --git a/xtool/main.go b/xtool/main.go
index 494eb09..2e7b6cb 100644
--- a/xtool/main.go
+++ b/xtool/main.go
@@ -22,6 +22,7 @@ import "surdeus.su/core/xgo/xmodules"
 
 const (
 	sourceFileExt = ".xgo"
+	sourceFileExtMain = ".tengo"
 	replPrompt    = ">> "
 )
 
@@ -84,7 +85,8 @@ func Run(flags *mtool.Flags) {
 			_, _ = fmt.Fprintln(os.Stderr, err.Error())
 			os.Exit(1)
 		}
-	} else if filepath.Ext(inputFile) == sourceFileExt {
+	} else if ext := filepath.Ext(inputFile)
+			ext == sourceFileExt || ext == sourceFileExtMain {
 		err := CompileAndRun(modules, inputData, inputFile)
 		if err != nil {
 			_, _ = fmt.Fprintln(os.Stderr, err.Error())
@@ -218,7 +220,7 @@ func RunREPL(modules *tengo.ModuleMap, in io.Reader, out io.Writer) {
 			modules,
 			nil,
 		)
-		c.SetImportFileExt(sourceFileExt)
+		c.SetImportFileExt(sourceFileExt, sourceFileExtMain)
 		if err := c.Compile(file); err != nil {
 			_, _ = fmt.Fprintln(out, err.Error())
 			continue