大约有 40,000 项符合查询结果（耗时：0.0527秒） [XML]
Hibernate SessionFactory vs. JPA EntityManagerFactory
...hat are not available in the EntityManager, you can obtain the session by calling:
Session session = entityManager.unwrap(Session.class);
share
|
improve this answer
|
foll...
How to convert float to int with Java
...a long. Math.round(float a) returns an int. docs.oracle.com/javase/7/docs/api/java/lang/…
– Hososugi
Mar 13 '14 at 17:47
...
The differences between .build, .create, and .create! and when should they be used?
...< 3.x
The most important part, however, is that these methods can be called through an association (has_many, etc.) to automatically link the two models.
share
|
improve this answer
|
...
Why use bzero over memset?
...e used if you want to ensure the compiler doesn't quietly optimize-away a call to "scrub" memory for some security-related purpose (such as blanking-out a region of memory that contained a sensitive piece of information such as a cleartext password).
– Christopher Schultz
...
In which case do you use the JPA @JoinTable annotation?
... project_id
name name task_id
The Project_Tasks table is called a "Join Table". To implement this second solution in JPA you need to use the @JoinTable annotation. For example, in order to implement a uni-directional one-to-many association, we can define our entities as such:
Proj...
Asynchronous vs Multithreading - Is there a difference?
...s the event to your application.
Frequently higher-level abstractions and APIs don't expose the underlying asynchronous API's available from the OS and the underlying hardware. In those cases it's usually easier to create threads to do asynchronous operations, even if the spawned thread is just wa...
Find all packages installed with easy_install/pip?
Is there a way to find all Python PyPI packages that were installed with easy_install or pip? I mean, excluding everything that was/is installed with the distributions tools (in this case apt-get on Debian).
...
plupload图片上传插件的使用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...提供一个高度可用的上传插件。Plupload 目前分为一个核心API 和一个jQuery上传队列部件，这样使你可以直接使用或是自己定制。
plupload特性
Plupload使用jQuery的组件做为选择文件和上传文件的队列组件。
Plupload使用Flash，Silverligh...
Importing from builtin library when module with same name exists
Situation:
- There is a module in my project_folder called calendar
- I would like to use the built-in Calendar class from the Python libraries
- When I use from calendar import Calendar it complains because it's trying to load from my module.
...
How do I create a namespace package in Python?
In Python, a namespace package allows you to spread Python code among several projects. This is useful when you want to release related libraries as separate downloads. For example, with the directories Package-1 and Package-2 in PYTHONPATH ,
...