大约有 40,000 项符合查询结果（耗时：0.0459秒） [XML]
Postgresql: Conditionally unique constraint
I'd like to add a constraint which enforces uniqueness on a column only in a portion of a table.
2 Answers
...
How can I create a copy of an object in Python?
I would like to create a copy of an object. I want the new object to possess all properties of the old object (values of the fields). But I want to have independent objects. So, if I change values of the fields of the new object, the old object should not be affected by that.
...
Mockito: Inject real objects into private @Autowired fields
I'm using Mockito's @Mock and @InjectMocks annotations to inject dependencies into private fields which are annotated with Spring's @Autowired :
...
Suppress command line output
I have a simple batch file like this:
4 Answers
4
...
Collections.emptyList() returns a List?
I'm having some trouble navigating Java's rule for inferring generic type parameters. Consider the following class, which has an optional list parameter:
...
Regex for string contains?
What is the regex for simply checking if a string contains a certain word (e.g. 'Test')? I've done some googling but can't get a straight example of such a regex. This is for a build script but has no bearing to any particular programming language.
...
How to install APK from PC?
I want to install an APK from PC to Android device. And because of user's Android and generally technical skills, I need to do it as automatically (silently) as possible. So how do I send an APK from PC to Android and start install there?
...
Difference between validate(), revalidate() and invalidate() in Swing GUI
Swing components have multiple methods related to updates of screen layout, in particular:
2 Answers
...
Jackson how to transform JsonNode to ArrayNode without casting?
I am changing my JSON library from org.json to Jackson and I want to migrate the following code:
4 Answers
...
In Git, how do I figure out what my current revision is?
I just want to know what my current version number is.
5 Answers
5
...