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How to get Enum Value from index in Java?
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How to fully clean bin and obj folders within Visual Studio?
...for VS 2015.
<Target Name="SpicNSpan" AfterTargets="Clean"> <!-- common vars https://msdn.microsoft.com/en-us/library/c02as0cs.aspx?f=255&MSPPError=-2147217396 -->
<RemoveDir Directories="$(TargetDir)" /> <!-- bin -->
<RemoveDir Directories="$(ProjectDir)$(B...
What are the big improvements between guava and apache equivalent libraries?
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First of, as javamonkey79 explained, while Google Guava and Apache Commons do share similar features, they also both have functionality that is absent from their counterpart. Thus, limiting yourself to only one library might be unwise.
That being said, if I had to choose, I'd opt to use Gua...
Why does String.valueOf(null) throw a NullPointerException?
...erent things)
Using good IDE, you can check which overload is selected at compile time
With Eclipse, you can mouse-hover on the above expression and see that indeed, the valueOf(char[]) overload is selected!
Sometimes you want to explicitly cast null (examples to follow)
See also
Polymorphis...
Routing: The current request for action […] is ambiguous between the following action methods
...ethod (or vice versa), and this algoritm is not strongly-typed.
You can accomplish what you want using custom routes pointing to different action methods:
... in Global.asax
routes.MapRoute( // this route must be declared first, before the one below it
"StartBrowse",
"Gallery/Browse/Sta...
String formatting in Python 3
... of doing it using a single argument twice (as @Burhan Khalid noted in the comments):
"({0.goals} goals, ${0.penalties})".format(self)
Explaining:
{} means just the next positional argument, with default format;
{0} means the argument with index 0, with default format;
{:d} is the next position...
How to get value from form field in django framework?
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How does lombok work?
...PI, as Sean Patrick Floyd said. However, as lombok is ONLY involved in the compilation phase, its misleading to claim Lombok will only run on a sun VM. It'll only compile on ecj or sun's javac. However, the vast majority of VMs out there, if they ship a compiler at all, are one of those two. For exa...
Does a const reference class member prolong the life of a temporary?
... reference in your example is bound to the constructor's argument n, and becomes invalid when the object n is bound to goes out of scope.
The lifetime extension is not transitive through a function argument. §12.2/5 [class.temporary]:
The second context is when a reference is bound to a tempor...
What's the difference between design patterns and architectural patterns?
...to sketch the differences to best of my knowledge.
Patterns are distilled commonality that you find in programs. It allows us to deconstruct a large complex structure and build using simple parts. It provides a general solution for a class of problems.
A large complex software goes through a seri...