There are some possibilities: Store a vector of pointers (use if your vectors share ownership of the pointers): std::vector<std::shared_ptr<Foo>> vA, vB; Store a vector of wrapped references (use if the vectors do not share ownership of the pointers, and you know the object referenced are valid past the lifetime of the vectors): std::vector<std::reference_wrapper<Foo>> vA, vB; … Read more
Although your question is not very clear, I’m going to assume you mean a 2D vector to mean a vector of vectors: vector< vector<int> > vvi; Then you need to use two iterators to traverse it, the first the iterator of the “rows”, the second the iterators of the “columns” in that “row”: //assuming you … Read more
I think you would do it like this: I would use two iterators on the vector : The first of one reads the data and inserts it a temporary set. When the read data was not in the set you copy it from the first iterator to the second and increment it. At the end … Read more
erase() returns a new iterator: for(iterator it = begin; it != end(container) /* !!! */;) { if (it->somecondition()) { it = vec.erase(it); // Returns the new iterator to continue from. } else { ++it; } } Note that we can no longer compare it against a precalculated end, because we may erase it and therefore … Read more
SVG would probably be easier to implement. I would look in to Raphael JS Here is a relevant example of what raphael JS can do and how little code it takes SVG world map definitions can be found numerous places, including Wikipedia, they shouldn’t be too hard to search for.
std::vector has a fill constructor which creates a vector of n elements and fills with the value specified. a has the type std::vector<std::vector<int>> which means that it is a vector of a vector. Hence your default value to fill the vector is a vector itself, not an int. Therefore the second options is the correct … Read more
Effective STL, by Scott Meyers, Item 17: Use the swap trick to trim excess capacity. vector<Person>(persons).swap(persons); After that, persons is “shrunk to fit”. This relies on the fact that vector‘s copy constructor allocates only as much as memory as needed for the elements being copied.
queue<int> q({1, 2, 3});
Update: in recent versions of Photoshop, there is a built-in option to export the image as SVG, which works well on paths and custom shapes. Just do: File -> Export -> Export as… and select SVG in the file settings. Original Answer: Starting from Photoshop CC 14.2, you can create SVG files directly from Photoshop: … Read more