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How to create and handle composite primary key in JPA
...ask is to use @IdClass annotation, and place both your id in that IdClass. Now you can use normal @Id annotation on both the attributes
@Entity
@IdClass(MyKey.class)
public class YourEntity {
@Id
private int id;
@Id
private int version;
}
public class MyKey implements Serializable ...
NSDate get year/month/day
...o the user. Consider that users might follow a Buddhist calendar (the year now is 2558 or something), or any other number of odd calendars. You don't want your app to break in these cases. Use the gregorian calendar unless you have a very specific reason not to. This bug is hard to catch because you...
Specifying Maven's local repository location as a CLI parameter
... executed. This will make your default local repo stay where it should be.
Now you can use mvn -Dm2.localRepository=... <phases/goals>. Because your command line system property gets added to the command line after the one in the mvn script, it will take precedence. (At least I'm pretty sure i...
How can you iterate over the elements of an std::tuple?
... overloads for every type the tuple might contain. This works best if you know all the tuple elements will share a common base class or something similar.
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Why am I getting tree conflicts in Subversion?
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I don't know if this is happening to you, but sometimes I choose the wrong directory to merge and I get this error even though all the files appear completely fine.
Example:
Merge /svn/Project/branches/some-branch/Sources
to /svn/Pr...
Is there an exponent operator in C#?
... @Justas I just testing that on .NET Core 2.1 and Math.Pow is now faster than the suggested alternative implementation.
– bytedev
Dec 19 '18 at 11:19
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Trigger a button click with JavaScript on the Enter key in a text box
... was pretty much synonymous with JS back when this answer was posted. But now a lot of us who avoid jQuery altogether (because it's just a waste of kb when you're using something like React) feel annoyed when we search for answers to JS questions and often the first thing that comes up is a library...
Run a single Maven plugin execution?
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This answer is now outdated with current versions of Maven. See the answer provided by @Joe
– Noremac
Sep 2 '15 at 15:51
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Selecting the last value of a column
...pefully one that is not hard coded), but this is the best I could find for now.
Note that if you use the function in cell like stated earlier, it will update upon reload. Maybe there is a way to hook into onEdit() and force in cell functions to update. I just can't find it in the documentation.
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Enable remote connections for SQL Server Express 2012
...om Visual Studio 2012 from my desktop PC, and repeatedly getting the well-known error:
17 Answers
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