lunaspeed · June 19, 2020 00:48
diff --git a/functional.go b/functional.go
 func sum(list []int) int {
 	var t int
 	for _, i := range list {
 		t += i
 	}
 	return t
 }

 //只能加總數字？
diff --git a/functional1.go b/functional1.go
 type Appendable interface {
 	Append(Appendable) Appendable
 }


 func sum(list []Appendable) Appendable {
 	var t Appendable
 	for _, a := range list {
    t = t.Append(a)
 	}
 	return t
 }
	type Appendable interface {
	Append(Appendable) Appendable
	}


	func sum(list []Appendable) Appendable {
	var t Appendable
	for _, a := range list {
	t = t.Append(a)
	}
	return t
	}