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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.
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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...
What is the difference between assert, expect and should in Chai?
...r one style over the other. This being said, there are also a couple technical considerations worth highlighting:
The assert and expect interfaces do not modify Object.prototype, whereas should does. So they are a better choice in an environment where you cannot or do not want to change Object.pro...
How to reuse an ostringstream?
... (and the underlying buffer) so that my app doesn't have to do as many allocations. How do I reset the object to its initial state?
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