大约有 4,041 项符合查询结果（耗时：0.0137秒） [XML]
Is it abusive to use IDisposable and “using” as a means for getting “scoped behavior” for exception
Something I often used back in C++ was letting a class A handle a state entry and exit condition for another class B , via the A constructor and destructor, to make sure that if something in that scope threw an exception, then B would have a known state when the scope was exited. This isn't pur...
Constant Amortized Time
...onsider insertion of elements in dynamic array (for example std::vector in C++). Let's plot a graph, that shows dependency of number of operations (Y) needed to insert N elements in array:
Vertical parts of black graph corresponds to reallocations of memory in order to expand an array. Here we ca...
List of ANSI color escape sequences
...tions below) in C you might write:
printf("\033[31;1;4mHello\033[0m");
In C++ you'd use
std::cout<<"\033[31;1;4mHello\033[0m";
In Python3 you'd use
print("\033[31;1;4mHello\033[0m")
and in Bash you'd use
echo -e "\033[31;1;4mHello\033[0m"
where the first part makes the text red (31), bold ...
Is Java “pass-by-reference” or “pass-by-value”?
... was pointed to. However, you cannot change where that pointer points.
In C++, Ada, Pascal and other languages that support pass-by-reference, you can actually change the variable that was passed.
If Java had pass-by-reference semantics, the foo method we defined above would have changed where myD...
Applying a function to every row of a table using dplyr?
...utate(ab =Coalesce(a,b))
Note that implementing the vectorization in C / C++ will be faster, but there isn't a magicPony package that will write the function for you.
share
|
improve this answer
...
File name? Path name? Base name? Naming standard for pieces of a path
...
In C++, Boost.Filesystem has devised a nomenclature for the various parts of a path. See the path decomposition reference documentation for details, as well as this tutorial.
Here's a summary based on the tutorial. For:
Windo...
What is the __del__ method, How to call it?
...k?
Here is a slightly opinionated answer.
Don't use __del__. This is not C++ or a language built for destructors. The __del__ method really should be gone in Python 3.x, though I'm sure someone will find a use case that makes sense. If you need to use __del__, be aware of the basic limitations per...
Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?
...blem is that there are several different time functions available in C and C++, and some of them vary in behavior between implementations. There are also a lot of half-answers floating around. Compiling a list of clock functions together with their properties would answer the question properly. F...
What is the JUnit XML format specification that Hudson supports?
...
I found a way around it. Since we are using c++ I am just reporting the number of failures in the failure message and using the "Stack Trace" to report the actual failures. Since the stack trace is reported from the text withing the body of the failure element, new lin...
Stack smashing detected
...t other memory problems such as memory leaks: How to find memory leak in a C++ code/project?
Valgrind SGCheck
As mentioned by others, Valgrind is not good at solving this kind of problem.
It does have an experimental tool called SGCheck:
SGCheck is a tool for finding overruns of stack and glo...