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How can I comment a single line in XML?
...the bottom comment. The downside is having to edit the bottom comment each time, which would probably make it easier to just type in <!-- at the top and --> at the bottom each time.
I also want to mention that other commenters recommend using an XML editor that allows you to right-click and c...
In log4j, does checking isDebugEnabled before logging improve performance?
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String.format is 40 times slower than concat & slf4j has limitation of 2 params See numbers here: stackoverflow.com/questions/925423/… I have seen many a profiler graph where the format operation is wasted in debug statements when the p...
Is it possible to program iPhone in C++
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Objective-C and C++ came about at around the same time, both with the goal of adding object oriented programming to C. Objective-C followed Smalltalk’s model of everything being dynamic dispatch, C++ chose to use function pointers (virtual methods) basically. The weird sy...
Common elements in two lists
... Contains looks like it'd be an O(n) operation, which would be called n times, unless the compiler does something clever. Does anyone know whether the above runs in linear or quadratic time?
– Regorsmitz
Aug 12 '16 at 20:56
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Remove all occurrences of a value from a list?
...list (up until they find a match) so you end up scanning the list multiple times that way.
– John Kugelman
Jul 21 '09 at 3:24
4
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Add file extension to files with bash
... this elegant and simple solution -- I have landed on this answer multiple times, but can't seem to memorize it. #dejavu
– Tim Andersen
Jan 30 '19 at 18:11
add a comment
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Splitting on last delimiter in Python string?
....rsplit(',', 1)
s.rpartition(',')
str.rsplit() lets you specify how many times to split, while str.rpartition() only splits once but always returns a fixed number of elements (prefix, delimiter & postfix) and is faster for the single split case.
Demo:
>>> s = "a,b,c,d"
>>> ...
DLL and LIB files - what and why?
...ction working correctly you don't want to have to recompile the code every time you use it, so you put the executable code for that function in a library, and the linker can extract and insert the compiled code into your program. Static libraries are sometimes called 'archives' for this reason.
Dy...
Forced naming of parameters in Python
...ther alternatives can be anticipated.
Cons:
Checking occurs during run-time, not compile-time.
Use of an extra parameter (though not argument) and an additional check. Small performance degradation respect to regular functions.
Functionality is a hack without direct support by the language (see...
WAMP/XAMPP is responding very slow over localhost
...and installed WAMP. Still, accessing localhost is very, very slow, and sometimes it doesn't even load at all. I even removed it and replaced it with XAMPP, but I still got the same result. What might possibly be the problem? Here's my current hosts file:
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