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What does the question mark in Java generics' type parameter mean?
This is a small snippet of code taken from some of the examples that accompany the Stanford Parser. I've been developing in Java for about 4 years, but have never had a very strong understanding of what this style of code is supposed to indicate.
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How do you attach a new pull request to an existing issue on github?
...ot sure, but I have a vague memory of creating a github pull request with "Issue 4" or something in the title, and it automatically attached itself to Issue 4 in the project that I was submitting it to. I tried it again recently and it didn't work -- it just created a brand new issue instead. I don'...
What is a reasonable length limit on person “Name” fields?
... limit of 50 characters to coincide with my database table where the field is varchar(50), but then I started to wonder.
11...
In what cases will HTTP_REFERER be empty
...t's possible to get an empty HTTP_REFERER. Under what circumstances does this happen? If I get an empty one, does it always mean that the user changed it? Is getting an empty one the same as getting a null one? and under what circumstances do I get that too?
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Easy way of running the same junit test over and over?
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With JUnit 5 I was able to solve this using the @RepeatedTest annotation:
@RepeatedTest(10)
public void testMyCode() {
//your test code goes here
}
Note that @Test annotation shouldn't be used along with @RepeatedTest.
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How do I use a custom deleter with a std::unique_ptr member?
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Bar* create();
void destroy(Bar*);
You can write your class Foo like this
class Foo {
std::unique_ptr<Bar, void(*)(Bar*)> ptr_;
// ...
public:
Foo() : ptr_(create(), destroy) { /* ... */ }
// ...
};
Notice that you don't need to write any lambda or custom deleter he...
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<% %> - is for inline code (especially logic flow)
<%$ %> - is for evaluating expressions (like resource variables)
<%@ %> - is for Page directives, registering assemblies, importing namespaces, etc.
<%= %> - is sho...
Converting numpy dtypes to native python types
...0, 'D').item()) # <class 'datetime.timedelta'>
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(Another method is np.asscalar(val), however it is deprecated since NumPy 1.16).
For the curious, to build a table of conversions of NumPy array scalars for your system:
for name in dir(np):
obj = getattr(np, name)
if hasattr(obj...
What is the difference between Elastic Beanstalk and CloudFormation for a .NET project?
...ication and have started playing around with AWS and deploying it via the Visual Studio Toolkit. I have successfully deployed the application using the Elastic Beanstalk option in the toolkit.
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Detect when browser receives file download
...g time to generate, so I'd like to show a "waiting" indicator. The problem is, I can't figure out how to detect when the browser has received the file, so I can hide the indicator.
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