CPP

c++ erase remove

std::vector<int> v = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
v.erase(std::remove(v.begin(), v.end(), 5), v.end());
// v will be {0 1 2 3 4 6 7 8 9}

delete c++

// Delete is like 'free' in C.
// If you have a dynamic variable, you need to free its memory (delete it) using the delete keyword.
int arr = new int[7];
delete arr[];

erase in c++

// Non Empty map example
// CPP program to illustrate
// Implementation of empty() function
#include <iostream>
#include <map>
using namespace std;
  
int main()
{
    map<char, int> mymap;
    mymap['a'] = 1;
    mymap['b'] = 2;
    if (mymap.empty()) {
        cout << "True";
    }
    else {
        cout << "False";
    }
    return 0;
}