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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
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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.
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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 :
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Suppress command line output
I have a simple batch file like this:
4 Answers
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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:
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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.
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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?
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Difference between validate(), revalidate() and invalidate() in Swing GUI
Swing components have multiple methods related to updates of screen layout, in particular:
2 Answers
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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
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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
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