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[];

delete[] cpp

delete[] arr // calls destructors for each element in array
  			 // before calling array deallocating function