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Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...solution to this problem for ages. I have recently implemented this DFS in C++ and it works a treat.
– AndyUK
Nov 10 '08 at 11:16
6
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What does the thread_local mean in C++11?
I am confused with the description of thread_local in C++11. My understanding is, each thread has unique copy of local variables in a function. The global/static variables can be accessed by all the threads (possibly synchronized access using locks). And the thread_local variables are visible to...
Why does Ruby have both private and protected methods?
...this.
It is important to note that this is different from the way Java or C++ works. private in Ruby is similar to protected in Java/C++ in that subclasses have access to the method. In Ruby, there is no way to restrict access to a method from its subclasses like you can with private in Java.
Vis...
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.
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File name? Path name? Base name? Naming standard for pieces of a path
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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...