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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...
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...
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?
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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...
Using smart pointers for class members
...ving trouble understanding the usage of smart pointers as class members in C++11. I have read a lot about smart pointers and I think I do understand how unique_ptr and shared_ptr / weak_ptr work in general. What I don't understand is the real usage. It seems like everybody recommends using uniq...