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Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
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Put servlet class in a package
First of all, put the servlet class in a Java package. You should always put publicly reuseable Java classes in a package, otherwise they are invisible to classes which are in a package, such as the server itself. This way you elimini...
Difference between static and shared libraries?
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Shared libraries are .so (or in Windows .dll, or in OS X .dylib) files. All the code relating to the library is in this file, and it is referenced by programs using it at run-time. A program using a shared library only makes reference to the code that it uses in the shared library.
Static librar...
Looking for simple Java in-memory cache [closed]
...kedHashMap isn't good enough), and which can be serialized to disk periodically.
9 Answers
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Android DialogFragment vs Dialog
...simple AlertDialog with Yes/No confirmation buttons. Not very much code at all.
With regards handling events in your fragment there would be various ways of doing it but I simply define a message Handler in my Fragment, pass it into the DialogFragment via its constructor and then pass messages back...
How do I typedef a function pointer with the C++11 using syntax?
...hank you. And I prefer seeing a pointer, as it is a function pointer after all.
– Pierre
Mar 31 at 7:34
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Specifying and saving a figure with exact size in pixels
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plt.figure(figsize=(800/my_dpi, 800/my_dpi), dpi=my_dpi)
So you basically just divide the dimensions in inches by your DPI.
If you want to save a figure of a specific size, then it is a different matter. Screen DPIs are not so important anymore (unless you ask for a figure that won't fit in ...
How do I determine height and scrolling position of window in jQuery?
...ht = $(window).height();
const scrollTop = $(window).scrollTop();
http://api.jquery.com/scrollTop/
http://api.jquery.com/height/
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Benefits of header-only libraries
...re the library might be used. When you separate the implementation, you usually do so to hide implementation details, and distribute the library as a combination of headers and libraries (lib, dll's or .so files). These of course have to be compiled for all different operating systems/versions you o...
How to write asynchronous functions for Node.js
...difference is that they are not executed immediately but passed around as callbacks.
How should I implement error event handling correctly
Generally API's give you a callback with an err as the first argument. For example
database.query('something', function(err, result) {
if (err) handle(e...
Using async/await for multiple tasks
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int[] ids = new[] { 1, 2, 3, 4, 5 };
Parallel.ForEach(ids, i => DoSomething(1, i, blogClient).Wait());
Although you run the operations in parallel with the above code, this code blocks each thread that each operation runs on. For example, if the network call t...