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How does autowiring work in Spring?
...nt for a Spring-MVC application is the DispatcherServlet, but it is hidden from you, and hence the direct interaction and bootstrapping of the application context happens behind the scene.
UserServiceImpl should also be defined as bean - either using <bean id=".." class=".."> or using the @Ser...
What is reflection and why is it useful?
...methods which are marked or work in a certain way is still common.
Update from a comment:
The ability to inspect the code in the system and see object types is
not reflection, but rather Type Introspection. Reflection is then the
ability to make modifications at runtime by making use of
i...
STL or Qt containers?
... using std::(w)string and the STL containers exclusively and converting to/from the Qt equivalents, but I have already switched to QString and I find that I'm using Qt's containers more and more.
When it comes to strings, QString offers much more complete functionality compared to std::basic_string...
Why does isNaN(“ ”) (string with spaces) equal false?
...
@Kooilnc not to take away even slightly from the wackiness of javascript, but these NaNs are just obeying the IEEE 754 floating point standard. You can read ALL about it as usual on the big W: en.wikipedia.org/wiki/NaN
– Spike0xff
...
What is a “surrogate pair” in Java?
...ode units are used. Since 16 bits can only contain the range of characters from 0x0 to 0xFFFF, some additional complexity is used to store values above this range (0x10000 to 0x10FFFF). This is done using pairs of code units known as surrogates.
The surrogate code units are in two ranges known as "...
Multiple variables in a 'with' statement?
... docs at docs.python.org/library/contextlib.html#contextlib.nested differs from the standard nested with blocks. The managers are created in order before entering the with blocks: m1, m2, m3 = A(), B(), C() If B() or C() fails with exception, then your only hope of properly finalizing A() is the g...
How to create a custom string representation for a class object?
...
Ignacio Vazquez-Abrams' approved answer is quite right. It is, however, from the Python 2 generation. An update for the now-current Python 3 would be:
class MC(type):
def __repr__(self):
return 'Wahaha!'
class C(object, metaclass=MC):
pass
print(C)
If you want code that runs acr...
Why are arrays covariant but generics are invariant?
From Effective Java by Joshua Bloch,
9 Answers
9
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How to extract one column of a csv file
...ds up... if you want to use csvtool with standard input (example csv comes from another command) it's something like this cat input.csv | csvtool formath '%(2)\n' - Note I know cat here is useless but sub it for any command that would normally export a csv.
– General Redneck
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How to rethrow InnerException without losing stack trace in C#?
...d due to the await C# language feature, which unwraps the inner exceptions from AggregateException instances in order to make the asynchronous language features more like the synchronous language features.
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