map update field elixir

To update a field in a C++ map named "elixir", you can follow the steps below:

1. Access the element in the map using its key: cpp auto it = elixir.find(key); This line of code searches for the element with the specified key in the map and returns an iterator pointing to it.

2. Check if the element exists in the map: cpp if (it != elixir.end()) { // Element found } This condition ensures that the element with the given key is present in the map. If the iterator is not equal to the map's end iterator, it means the element exists.

3. Update the field of the element: cpp it->second = newValue; By using the iterator, you can access the value of the element and update it with the desired new value.

Here's the complete code snippet:

auto it = elixir.find(key);
if (it != elixir.end()) {
    it->second = newValue;
}

This code snippet will search for the element with the specified key in the map. If the element exists, it will update the field with the new value.