diff --git a/README.md b/README.md
index 5119d12..494343b 100644
--- a/README.md
+++ b/README.md
@@ -37,10 +37,10 @@ func Foo(optionsVariableParams ...FooOptions) {
 func main() {
 
 	// 不传递参数
-	Foo()
+	Foo() // Output: default foo
 
 	// 传递参数
-	Foo(FooOptions{Foo: "custom foo"})
+	Foo(FooOptions{Foo: "custom foo"}) // Output: custom foo
 
 }
 ```
diff --git a/examples/main.go b/examples/main.go
index d0e338b..9faae0c 100644
--- a/examples/main.go
+++ b/examples/main.go
@@ -24,9 +24,9 @@ func Foo(optionsVariableParams ...FooOptions) {
 func main() {
 
 	// 不传递参数
-	Foo()
+	Foo() // Output: default foo
 
 	// 传递参数
-	Foo(FooOptions{Foo: "custom foo"})
+	Foo(FooOptions{Foo: "custom foo"}) // Output: custom foo
 
 }
diff --git a/variable_parameter.go b/variable_parameter.go
index ffe02e5..6739c5e 100644
--- a/variable_parameter.go
+++ b/variable_parameter.go
@@ -18,3 +18,11 @@ func TakeFirstParamOrDefault[T any](parameters []T, defaultValue T) T {
 		return defaultValue
 	}
 }
+
+func TakeFirstParamOrDefaultFunc[T any](parameters []T, defaultValueFunc func() T) T {
+	if len(parameters) > 0 {
+		return parameters[0]
+	} else {
+		return defaultValueFunc()
+	}
+}