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Why can't static methods be abstract in Java?
...ements no functionality", and "static" means: "There is functionality even if you don't have an object instance". And that's a logical contradiction.
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Get JSF managed bean by name in any Servlet related class
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In a servlet based artifact, such as @WebServlet, @WebFilter and @WebListener, you can grab a "plain vanilla" JSF @ManagedBean @RequestScoped by:
Bean bean = (Bean) request.getAttribute("beanName");
and @ManagedBean @SessionScoped by:
Bean bean =...
How do I detach objects in Entity Framework Code First?
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If you want to detach existing object follow @Slauma's advice. If you want to load objects without tracking changes use:
var data = context.MyEntities.AsNoTracking().Where(...).ToList();
As mentioned in comment this will n...
How to add a changed file to an older (not last) commit in Git
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Use git rebase. Specifically:
Use git stash to store the changes you want to add.
Use git rebase -i HEAD~10 (or however many commits back you want to see).
Mark the commit in question (a0865...) for edit by changing the word pick at the start ...
How to detect the device orientation using CSS media queries?
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It may not be a bad thing to apply a different style when the keyboard is popped up because the visible area is generally more fit for the style that applies to the landscape mode. So may not be a bummer.
– Muhammad bin Yusrat
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How to set a default value with Html.TextBoxFor?
Simple question, if you use the Html Helper from ASP.NET MVC Framework 1 it is easy to set a default value on a textbox because there is an overload Html.TextBox(string name, object value) . When I tried using the Html.TextBoxFor method, my first guess was to try the following which did not work...
Couldn't connect to server 127.0.0.1:27017
...indicates that mongodb is terminating because there is an old lock file.
If you are not and were not running with journaling, remove the lock file, run repair, and start mongodb again.
If you are or were running with journaling turned on, see the relevant Mongo DB docs. Note that they say "If you...
How can I access an internal class from an external assembly?
Having an assembly which I cannot modify (vendor-supplied) which have a method returning an object type but is really of an internal type.
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How many random elements before MD5 produces collisions?
...uadrillion 607 trillion 431 billion 768 million 211 thousand 456.
However if you keep all the hashes then the probability is a bit higher thanks to birthday paradox. To have a 50% chance of any hash colliding with any other hash you need 264 hashes. This means that to get a collision, on average, y...
How to get all of the immediate subdirectories in Python
...scandir:
list_subfolders_with_paths = [f.path for f in os.scandir(path) if f.is_dir()]
Bonus: With scandir you can also simply only get folder names by using f.name instead of f.path.
This (as well as all other functions below) will not use natural sorting. This means results will be sorted lik...