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What is the difference between getFields and getDeclaredFields in Java reflection
... Great answer, but it should be noted that private fields in superclasses cannot be used by instances of the current class for Field#get and similar methods. In other words, this approach does not allow the current class access to the private interface of its superclass, in the same way the typica...
WPF Data Binding and Validation Rules Best Practices
I have a very simple WPF application in which I am using data binding to allow editing of some custom CLR objects. I am now wanting to put some input validation in when the user clicks save. However, all the WPF books I have read don't really devote any space to this issue. I see that you can create...
Is it unnecessary to put super() in constructor?
Isn't this one automatically put by the compiler if I don't put it in a subclass's constructor?
6 Answers
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Is it possible to use global variables in Rust?
...eral, global-variables are to be avoided. Nevertheless, I think in a practical sense, it is sometimes desirable (in situations where the variable is integral to the program) to use them.
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Is there an R function for finding the index of an element in a vector?
... 3 2 3 1 1 2 2
which(x %in% c(2,4))
# [1] 2 5 9 10
%in% returns a logical vector as long as the first argument, with a TRUE if that value can be found in the second argument and a FALSE otherwise.
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Allow CORS REST request to a Express/Node.js application on Heroku
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The reason it did is because you need to have it defined before the app.use(app.router); Cheers!
– Michal
Aug 19 '12 at 14:34
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How to return a file using Web API?
...ateResponse(HttpStatusCode.BadRequest);
string fileName;
string localFilePath;
int fileSize;
localFilePath = getFileFromID(id, out fileName, out fileSize);
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
response.Content = new StreamContent(new F...
When to use a “has_many :through” relation in Rails?
...s the has_many relationship
has_many :group_memberships
end
Now you can treat it like a normal has_many, but get the benefit of the association model when you need it.
Note that you can also do this with has_one.
Edit: Making it easy to add a user to a group
def add_group(group, role = "m...
Sleep Command in T-SQL?
... tests to see if the asynchronous pattern is really going to make it more scalable. In order to "mock" an external service that is slow, I want to be able to call a SQL server with a script that runs slowly, but isn't actually processing a ton of stuff.
...
await vs Task.Wait - Deadlock?
...de. On my blog, I go into the details of how blocking in asynchronous code causes deadlock.
await will asynchronously wait until the task completes. This means the current method is "paused" (its state is captured) and the method returns an incomplete task to its caller. Later, when the await expre...