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Should functions return null or an empty object?
...e to throw an exception.
Based on extensive comments below: if this is an API-level design question, this method could be analogous to "OpenFile" or "ReadEntireFile". We are "opening" a user from some repository and hydrating the object from the resultant data. An exception could be appropriate in ...
What are the differences between the different saving methods in Hibernate?
...
Here's my understanding of the methods. Mainly these are based on the API though as I don't use all of these in practice.
saveOrUpdate
Calls either save or update depending on some checks. E.g. if no identifier exists, save is called. Otherwise update is called.
save
Persists an entity. Wi...
Difference between Destroy and Delete
...troy runs any callbacks on the model while delete doesn't.
From the Rails API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
The row is ...
What is the difference between JDK and JRE?
...
I have worked on JExcel API and I've set the classpath correctly and still there exists the problem. So i deployed it inside tlib/ext folder, which woks fine after that?? So what would be reason??
– i2ijeya
Dec...
When do Java generics require
...ownside of really accepting anything when T is an Object, which is not the APIs intent. The intent is to statically ensure that the matcher matches the actual object, and there is no way to exclude Object from that calculation.
The answer to the third question is that nothing would be lost, in term...
When do I need to use AtomicBoolean in Java?
...f threads are
running through your code that uses
these atomic concurrency API, they
will scale much better than code
which uses Object level
monitors/synchronization. Since,
Java's synchronization mechanisms
makes code wait, when there are lots
of threads running through your
critical sections, a s...
How do sessions work in Express.js with Node.js?
... that could be altered to whatever storage form implements the appropriate API.
So if you want to check things without a specific req request object, like you said, you need to just access that same storage. On the bottom of the first documentation page, it details required methods the storage nee...
Possible reason for NGINX 499 error codes
... Its happens on my Angular APP if the user closes the tab and my API requests does not get completed.
– Vivek Saurabh
Jun 26 at 7:20
...
Why do C++ libraries and frameworks never use smart pointers?
...n't have their own memory management; Generally they provide
utilities and APIs
They are implemented as wrapper, since they are actually objects and not pointers. Which has additional time/space cost, compared to raw pointers; The users of the libraries may not want to have such overheads
Edit: Us...
AngularJS : Prevent error $digest already in progress when calling $scope.$apply()
...is when writing angular services to wrap the facebook, google, and twitter APIs which, to varying degrees, have callbacks handed in.
Here's an example from within a service. (For the sake of brevity, the rest of the service -- that set up variables, injected $timeout etc. -- has been left off.)
wi...