小编ehr*_*ehr的帖子

在我的SpringBoot应用程序中，我正在使用CrudRepo。我发现返回值有问题：必需！=找到

GitHub：https : //github.com/einhar/WebTaskManager/tree/findById-problem

无论将方法返回类型从“任务”更改为“对象”->“ IDE都停止显示错误”，但由于稍后验证数据类型而可能会出现问题。

你知道怎么解决吗？有什么提示吗？

CrudRepo

public interface TaskRepository extends CrudRepository<Task, Integer> {}

服务

@Service
@Transactional
public class TaskService {

    @Autowired
    private final TaskRepository taskRepository;

    public TaskService(TaskRepository taskRepository) {
        this.taskRepository = taskRepository;
    }

    public List<Task> findAll() {
        List<Task> tasks = new ArrayList<>();
        for (Task task : taskRepository.findAll()) {
                tasks.add(task);
        }
        return tasks; // Work properly :)
    }
    /* ... */
    public Task findTask(Integer id) {
        return taskRepository.findById(id); // Find:Task | Required: java.util.Optional :(
    }
}

I would like to grep (on ubuntu18.04) a every line that fits the pattern that "at least one of two number is greater than 0".

I found infomation about '|' usage in regex but I see it does not work here.

One of tried option:

grep -E "Foo:[1-9]+ | Bar:[1-9]+" input

which returns:

grep -E "Foo:[1-9]+ | Bar:[1-9]+" input

and that is invalid cause it matches only Bar:[1-9]+

Input data:

Foo:1, Bar:1
Foo:0, Bar:1

Expected result in a solution:

Foo:1, …