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How to JSON serialize sets?
...s.
As shown in the json module docs, this conversion can be done automatically by a JSONEncoder and JSONDecoder, but then you would be giving up some other structure you might need (if you convert sets to a list, then you lose the ability to recover regular lists; if you convert sets to a dictionar...
Compiling a java program into an executable [duplicate]
...their website:
Can generate “Console”, “Windows GUI”, “Windows Service” three types of exe files.
Generated exe files can add program icons and version information.
Generated exe files can encrypt and protect java programs, no temporary files will be generated when program runs.
Genera...
Print current call stack from a method in Python code
In Python, how can I print the current call stack from within a method (for debugging purposes).
7 Answers
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decorators in the python standard lib (@deprecated specifically)
...r('always', DeprecationWarning) # turn off filter
warnings.warn("Call to deprecated function {}.".format(func.__name__),
category=DeprecationWarning,
stacklevel=2)
warnings.simplefilter('default', DeprecationWarning) # reset filter
...
Static method behavior in multi-threaded environment in java
... @selig if I have a class with only instance methods for ex: a service class and It is singleton then I don't need to worry about multiple threads executing the instance methods at a time as the service class does not hold any state where state is present only if class has instance varia...
Unit testing with Spring Security
...n the container to store the Principal, inject this into an "AuthenticationService" (singleton) and then inject this bean into other services that needed knowledge of the current Principal.
If you are implementing your own authentication service, you could basically do the same thing: create a sess...
What languages are Windows, Mac OS X and Linux written in?
...pile the kernel or API but we were able to compile individual programs and services. For example, we were able to successfully compile Notepad.exe, mspaint.exe, and the spoolsv.exe service (print spooler). All written in C. I have not looked again but I am sure that leaked code still survives as tor...
No module named _sqlite3
...opriate .so file. You can correct this problem with the steps below:
Install sqlite-devel (or libsqlite3-dev on some Debian-based systems)
Re-configure and re-compiled Python with ./configure --enable-loadable-sqlite-extensions && make && sudo make install
Note
The sudo make i...
Android Studio Project Structure (v.s. Eclipse Project Structure)
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Unit testing that events are raised in C# (in order)
...ited May 12 '11 at 15:38
David Hall
30.2k1010 gold badges8484 silver badges119119 bronze badges
answered Oct 30 '08 at 1:45
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