Descriptors in action

Now that we have seen what descriptors are, how they work, and what the main ideas behind them are, we can see them in action. In this section, we will be exploring some situations that can be elegantly addressed through descriptors.

Here, we will look at some examples of working with descriptors, and we will also cover implementation considerations for them (different ways of creating them, with their pros and cons), and finally we will discuss what the most suitable scenarios for descriptors are.

An application of descriptors

We will start with a simple example that works, but that will lead to some code duplication. It is not very clear how this issue will be addressed. Later on, we will devise a way of abstracting the repeated logic into a descriptor, which will address the duplication problem, and we will notice that the code on our client classes will be reduced drastically.

A first attempt without using descriptors

The problem we want to solve now is that we have...