Can you explain advanced examples of std::for_each in C++?

Can you explain advanced examples of std::for_each in C++?

Sure! The std::for_each algorithm applies a function to a range of elements. For advanced usage, you can use it with lambda expressions.

Can you give me a specific example using a lambda function?

Absolutely! Here's an example: std::for_each(vec.begin(), vec.end(), [](int &n) { n *= 2; }); This doubles each element in the vector.

What if I want to use it with a custom object?

You can do that too! For instance, if you have a vector of objects, you can use std::for_each to call a member function on each object.

Can you show me that example?

Certainly! If you have a class Person with a method greet(), you can do: std::for_each(people.begin(), people.end(), [](Person &p) { p.greet(); }); This will call greet() for each Person in the vector.