// Pointer T型引数のポインタを返す
func Pointer[T any](v T) *T {
	return &v
}

// invalid operation: cannot use type assertion on type parameter value res (variable of type T constrained by number)
func NumberToString[T number](val T) string {
	if v, ok := val.(int); ok {
		return strconv.Itoa(v)
	}
	return ""
}

func Contains[T comparable](list []T, target T) bool {
	for _, v := range list {
		if v == target {
			return true
		}
	}
	return false
}