C++17 STL Cookbook

How to do it...

In this section, we will fill an std::vector instance with some example numbers, and implement a quick remove function, which removes any item from a vector in O(1) time.

1. First, we need to include the required header files.

      #include <iostream>      #include <vector>      #include <algorithm>

2. Then, we define a main function where we instantiate a vector with example numbers.

      int main()      {          std::vector<int> v {123, 456, 789, 100, 200};

3. The next step is to delete the value at index 2 (counting from zero of course, so it's the third number 789). The function we will use for that task is not implemented yet. We do that some steps later. Afterward, we print the vector's content.

          quick_remove_at(v, 2);                for (int i : v) { std::cout ...