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Logger slf4j advantages of formatting with {} instead of string concatenation
...t. By having the logger format a single string the code becomes cleaner in my opinion.
You can provide any number of arguments. Note that if you use an old version of sljf4j and you have more than two arguments to {}, you must use the new Object[]{a,b,c,d} syntax to pass an array instead. See e.g...
Difference between add(), replace(), and addToBackStack()
... answered Sep 5 '13 at 10:51
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C++ preprocessor __VA_ARGS__ number of arguments
... I'm not sure if this is the same in C, though, @Vroomfondel, since I lost my bookmark to the most recent draft.
– Justin Time - Reinstate Monica
Oct 29 '19 at 21:34
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Real World Example of the Strategy Pattern
...(Code is in C#). I absolutely love the Strategy pattern since it has saved my butt a lot of times when the project managers say: "We want the application to do 'X', but 'X' is not yet clear and it can change in the near future."
This video explaining the strategy pattern, uses StarCraft as an exampl...
Implementing slicing in __getitem__
...(one where the data is larger than you would want to create in memory) and my __getitem__ looks like this:
def __getitem__( self, key ) :
if isinstance( key, slice ) :
#Get the start, stop, and step from the slice
return [self[ii] for ii in xrange(*key.indices(len(self)))]
e...
Simple way to transpose columns and rows in SQL?
...t is extracting info from. Something like: (TRANSPOSE (SELECT......)) In my example given above, imagine that the first table is a result set generated from a very complex query involving multiple tables, unions, pivots etc. Yet the result is a simple table. I just want to flip the columns with ro...
Remove non-ascii character in string
... not. Although the character is embedded in the string as three bytes (in my case) of UTF-8, the instructions in the regular expression must use the two-byte Unicode. In fact, UTF-8 can be up to four bytes long; it is less compact than Unicode because it uses the high bit (or bits) to escape the s...
Using arrays or std::vectors in C++, what's the performance gap?
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The point in my answer is that vector doesn't have to be slower than correponding pointer operations. Of course, it can be (easy to achieve by enabling enable debug mode, too) :)
– Johannes Schaub - litb
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WPF Application that only has a tray icon
... I am the only one who dislikes references to System.Windows.Forms in my WPF App?
– Joel
Jul 27 '19 at 8:56
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Why is creating a Thread said to be expensive?
... are executed within the JVM thread in the OS. They are not often used, to my knowledge.
The biggest factor I can think of in the thread-creation overhead, is the stack-size you have defined for your threads. Thread stack-size can be passed as a parameter when running the VM.
Other than that, thr...