... What about passing dynamically allocated arrays to functions in C++? In C11 standard it can be done for statically and dynamically allocated arrays like that fn(int col,int row, int array[col][row]): stackoverflow.com/questions/16004668/… I have made the...

...ions with N elements requires bare factorial, and is needed if you want to allocate a structure to hold the permutations. – Mark Jeronimus Jan 1 '16 at 17:46 ...

... How about not using String.getBytes? It allocates a copy of string, so it is not memory effective solution. The reason to use inputstream is usually to avoid keeping a copy of large object in memory – Vitamon May 19 '16 at 11:...

...to create some type of buffer for which you need some memory of given size allocated. I often use this when initializing arrays or expanding some file by writing zeros to it. share | improve this an...

...it with an example: UIViewController *viewController = [[UIViewController alloc] init]; viewController.view.backgroundColor = [UIColor redColor]; UINavigationController *mainNavigationController = [[UINavigationController alloc] initWithRootViewController:viewController]; Here you are not setting...

...rence count, and a semantic copy of a Vec<T> involves creating a new allocation, and then semantically copying each stored element from the old to the new. These can be deep copies (e.g. Vec<T>) or shallow (e.g. Rc<T> doesn't touch the stored T), Clone is loosely defined as the sma...

... the bitmapOriginal with a radius of 8 and save it in bitmapOriginal final Allocation input = Allocation.createFromBitmap(rs, bitmapOriginal); //use this constructor for best performance, because it uses USAGE_SHARED mode which reuses memory final Allocation output = Allocation.createTyped(rs, input...

...now if the function will throw. For a reminder, any kind of dynamic memory allocation may throw. Okay, now on to the possible optimizations. The most obvious optimizations are actually performed in the libraries. C++11 provides a number of traits that allows knowing whether a function is noexcep...

...nnot be used as a buffer, since it is a constant. Thus, you always have to allocate a char array for the buffer. The return value of strcat can simply be ignored, it merely returns the same pointer as was passed in as the first argument. It is there for convenience, and allows you to chain the call...

...ster implementation, the idea is to minimise copying operations and memory allocations by first exponentially growing the string: #include <string> #include <cstddef> std::string repeat(std::string str, const std::size_t n) { if (n == 0) { str.clear(); str.shrink_to...