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In which case do you use the JPA @JoinTable annotation?
...edBy annotation attribute. In fact, recent versions of Hibernate refuse to start up by printing the following error:
org.hibernate.AnnotationException:
Associations marked as mappedBy must not define database mappings
like @JoinTable or @JoinColumn
Let's pretend that you have an entity ...
Non-Relational Database Design [closed]
...
I've only just started with non-relational DBs, and I am still trying to wrap my head around it and figure out what the best model would be. And I can only speak for CouchDB.
Still, I have some preliminary conclusions:
Have you come up wi...
AngularJS : Initialize service with asynchronous data
...on because I needed the values to be available as constants when my app is started, even in module.config() blocks.
I created a small AngularJS app that loads the config, sets them as constants on the actual app and bootstraps it.
// define the module of your app
angular.module('MyApp', []);
// d...
What really is a deque in STL?
...y use a vector to store the T*? It gives us random access, which is a good start. Let's forget about the complexity of vector for a moment and build up to this carefully:
The standard talks about "the number of operations on the contained objects.". For deque::push_front this is clearly 1 because e...
How is Math.Pow() implemented in .NET Framework?
... an efficient approach for calculating a b (say a = 2 and b = 50 ). To start things up, I decided to take a look at the implementation of Math.Pow() function. But in .NET Reflector , all I found was this:
...
Java HashMap performance optimization / alternative
...e hash table has approximately twice the number of buckets.
So if you're starting off with a too-small HashMap, then every time it needs to resize, all the hashes are recomputed... which might be what you're feeling when you get to the 2-3 million insertion point.
...
Where is Python's sys.path initialized from?
...on loads the site module, which adds stuff yet further to sys.path:
It starts by constructing up to four directories from a head and a
tail part. For the head part, it uses sys.prefix and sys.exec_prefix;
empty heads are skipped. For the tail part, it uses the empty string
and then lib/sit...
How can I respond to the width of an auto-sized DOM element in React?
...the react-measure demonstration is (I think) pure ES6. It's tough getting started, for sure...I went through the same madness over the past year and a half :)
– Andy
Sep 16 '16 at 23:59
...
Large-scale design in Haskell? [closed]
...ild system. (EDIT: Actually you probably want to use Stack now for getting started.).
Use Haddock for good API docs
Tools like graphmod can show your module structures.
Rely on the Haskell Platform versions of libraries and tools, if at all possible. It is a stable base. (EDIT: Again, these days you...
Best practice for nested fragments in Android 4.0, 4.1 (
... android:layout_height="match_parent"
android:layout_gravity="start"
android:name="com.ringofblades.stackoverflow.app.NavigationDrawerFragment"
tools:layout="@layout/fragment_navigation_drawer" />
</android.support.v4.widget.DrawerLayout>
Note that "@+id/pager...