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What are forward declarations in C++?
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Why forward-declare is necessary in C++
The compiler wants to ensure you haven't made spelling mistakes or passed the wrong number of arguments to the function. So, it insists that it first sees a declaration of 'add' (or any other types, classes or functions)...
insert vs emplace vs operator[] in c++ map
...itialization of one object and the copy of the value into that object.
In C++11, with variadic templates and perfect forwarding there is a new way of adding elements into a container by means of emplacing (creating in place). The emplace functions in the different containers do basically the same t...
What is the most effective way for float and double comparison?
...re function to sort items in a collection. (In this case using the builtin C++ operator == for doubles produced correct results.)
Like I said: it all depends on context and the expected size of a and b.
BTW, std::numeric_limits<double>::epsilon() is the "machine epsilon". It is the differen...
How to automatically generate a stacktrace when my program crashes
I am working on Linux with the GCC compiler. When my C++ program crashes I would like it to automatically generate a stacktrace.
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Superiority of unnamed namespace over static?
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You're basically referring to the section §7.3.1.1/2 from the C++03 Standard,
The use of the static keyword is
deprecated when declaring objects in a
namespace scope; the
unnamed-namespace provides a superior
alternative.
Note that this paragraph was already removed in C++...
Calling Python in Java?
...s why python is so kool! Having such high abstractions however access to c,c++ when needed. Imagine if you could have that in java. This question is not even worth asking if jython is ok because then it is easy anyway.
So I have played with the following methods, and listed them from easy to difficu...
Why do you program in assembly? [closed]
..., many modern 3-D Games have their high performance core engine written in C++ and Assembly.
Games (and most programs these days) aren't "written in assembly" the same way they're "written in C++". That blog isn't saying that a significant fraction of the game is designed in assembly, or that a t...
Why are Standard iterator ranges [begin, end) instead of [begin, end]?
...n; it <= end; ++it) { ... }
Since pointers to arrays are iterators in C++ (and the syntax was designed to allow this), it's much easier to call std::find(array, array + size, some_value) than it is to call std::find(array, array + size - 1, some_value).
Plus, if you work with half-closed ran...
Are there any open source C libraries with common data structures? [closed]
...* to implement generic containers in C may be inefficient. C macros mimics C++ template and are as efficient as C++ template
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Why aren't superclass __init__ methods automatically invoked?
... a default state including its final runtime type. It is not equivalent to C++ constructors, that are called on a statically typed, allocated object with an undefined state. These are also different from __new__, so we really have at least four different kinds of allocation/construction/initializati...