c++vectorerase

Remove a Chunk of Items from a Vector?

I have a vector full of words and I am trying to erase a chunk of that vector at a specified beginning and end. For example:

#include <string>
#include <vector>

int main() {
    std::vector<std::string> words = { "The", "Quick", "Brown", "Fox", "Jumps", "Over", "The", "Lazy", "Dog" };
    words.remove_chunk(1, 2);
}

Here, words.remove_chunk(1, 2); would erase the items at index 1 through 2, leaving the vector to be:

{ "The", "Fox", "Jumps", "Over", "The", "Lazy", "Dog" }

How would I go about efficiently writing remove_chunk? Is there an stl function for this or a quick one-liner?

Solution

  • Use vector::erase:

    words.erase(words.begin(), words.begin() + 2);

    Note: Second iterator provided is words.begin() + 2 instead of words.begin() + 1 because STL uses [begin, end).