Unchecked call to ‘mapoPair(PairFunction＜T,K2,V2＞)‘ as a member of raw type
先解释下这里面的T,K2,V2啥意思。 这个是官方文档随便标记的，意思是: PairFunction<T, K, V> T => Tuple2<K, V> 也就是说，T是入口参数，K和V是返回的一个二维数组。 但是注意哈，这里是范型，而不是写死的函数。 如果是写死的函数，我们知道函数名前面是返回的变量的类型。 但是由于是泛型，这里函数名前面同时写了入口参数类型以及返回变量类型。 那么上面这个同
相关文章
- 1. PHP :: Call to a member function assign() on null
- 2. Call to a member function assign() on null
- 3. Uncaught Error: Call to a member function dispatch() on null
- 4. SwiftUI ContentView_Previews is not a member type of SceneDelegate
- 5. HibernateProxy. Forgot to register a type adapter?
- 6. ECmall错误:Call to a member function get_users_count（） on a non-object
- 7. ThinkPHP Call to a member function display() on a non-object问题的解决
- 8. controller.php Call to a member function fetch() on a non-object问题的解决
- 9. org.hibernate.proxy.HibernateProxy Forgot to register a type adapter?
- 10. 致命错误: Call to a member function validate() on null的问题
- 更多相关文章...
- • PHP Closure::call() - PHP 7 新特性
- • ASP Type 属性 - ASP 教程
- • 使用阿里云OSS+CDN部署前端页面与加速静态资源
- • 使用Rxjava计算圆周率
相关标签/搜索
每日一句
-
每一个你不满意的现在，都有一个你没有努力的曾经。
欢迎关注本站公众号,获取更多信息
相关文章
- 1. PHP :: Call to a member function assign() on null
- 2. Call to a member function assign() on null
- 3. Uncaught Error: Call to a member function dispatch() on null
- 4. SwiftUI ContentView_Previews is not a member type of SceneDelegate
- 5. HibernateProxy. Forgot to register a type adapter?
- 6. ECmall错误:Call to a member function get_users_count（） on a non-object
- 7. ThinkPHP Call to a member function display() on a non-object问题的解决
- 8. controller.php Call to a member function fetch() on a non-object问题的解决
- 9. org.hibernate.proxy.HibernateProxy Forgot to register a type adapter?
- 10. 致命错误: Call to a member function validate() on null的问题