Thread-local storage duration is a term used to refer to data that is seemingly global or static storage duration (from the viewpoint of the functions using it) but in actual fact, there is one copy per thread. It adds to the current automatic (exists during a block/function), static (exists for the program duration) and dynamic … Read more
From the friendly Wikipedia: The stdlib.h and stddef.h header files define a datatype called size_t which is used to represent the size of an object. Library functions that take sizes expect them to be of type size_t, and the sizeof operator evaluates to size_t. The actual type of size_t is platform-dependent; a common mistake is … Read more
In C++11, the using keyword when used for type alias is identical to typedef. 7.1.3.2 A typedef-name can also be introduced by an alias-declaration. The identifier following the using keyword becomes a typedef-name and the optional attribute-specifier-seq following the identifier appertains to that typedef-name. It has the same semantics as if it were introduced by … Read more
Mark all the desired projects in solution explorer. Press Alt-F7 or right click in solution explorer and select “Properties” Configurations: All Configurations Click on the Preprocessor Definitions line to invoke its editor Choose Edit Copy _CRT_SECURE_NO_WARNINGS into the Preprocessor Definitions white box on the top
arrays: are a builtin language construct; come almost unmodified from C89; provide just a contiguous, indexable sequence of elements; no bells and whistles; are of fixed size; you can’t resize an array in C++ (unless it’s an array of POD and it’s allocated with malloc); their size must be a compile-time constant unless they are … Read more
There are more approaches for image to ASCII art conversion which are mostly based on using mono-spaced fonts. For simplicity, I stick only to basics: Pixel/area intensity based (shading) This approach handles each pixel of an area of pixels as a single dot. The idea is to compute the average gray scale intensity of this … Read more
How about std::remove() instead: #include <algorithm> … vec.erase(std::remove(vec.begin(), vec.end(), 8), vec.end()); This combination is also known as the erase-remove idiom.
For positive numbers unsigned int x, y, q; To round up … q = (x + y – 1) / y; or (avoiding overflow in x+y) q = 1 + ((x – 1) / y); // if x != 0
A good rule of thumb is for anything that you need to compare in the loop condition against something that is naturally a std::size_t itself. std::size_t is the type of any sizeof expression and as is guaranteed to be able to express the maximum size of any object (including any array) in C++. By extension … Read more
In C/C++ a numeric literal prefixed with a ‘0’ is octal (base 8). See http://www.cplusplus.com/doc/tutorial/constants/