What are some practical use cases for C++ lambda expressions?

What are some practical use cases for C++ lambda expressions?

C++ lambda expressions are useful for creating inline functions, especially for algorithms, event handling, and callbacks.

Can you give me an example of using a lambda with the STL?

Sure! You can use a lambda with std::sort to sort a vector based on custom criteria. For example:

std::vector<int> vec = {5, 2, 9, 1};
std::sort(vec.begin(), vec.end(), [](int a, int b) { return a < b; });

What about using lambdas for event handling?

Lambdas are great for event handling in GUI applications. You can define a lambda to handle button clicks directly where the event is defined.

Are there any performance benefits to using lambdas?

Yes, lambdas can improve performance by reducing the overhead of function calls and allowing for optimizations by the compiler.