We are advancing through our journey of building various real-world applications. So far, we have explored the Adapter, Composite, and Decorator Patterns independently. In this unit, we are going to apply these patterns to different scenarios to solve real-world problems.

Before we dive in, let's quickly recap the structural patterns we have learned so far:

1. Adapter Pattern: This pattern allows two incompatible interfaces to work together. We accomplish this by creating an adapter class that converts one interface to another.
2. Composite Pattern: This pattern helps us compose objects into tree structures to represent part-whole hierarchies. This allows clients to treat individual objects and compositions of objects uniformly.
3. Decorator Pattern: This pattern allows us to add new functionality to an object dynamically. We achieve this by creating a decorator class that wraps around the original object.

We will integrate all three structural patterns into different scenarios to solve real-world problems. Let's get started!

In this unit, we will integrate all three structural patterns into different scenarios to solve real-world problems. Let's have a quick recap of the scenarios we will be working on:

1. We'll apply Decorator and Adapter patterns for GUI library-related tasks.
2. We'll use Decorator and Composite to work with restaurant menu items.
3. We'll use Adapter and Composite to work with an image gallery.
4. And finally, we'll use all three patterns together to work with an e-commerce application and food delivery application.

Exciting, right? Let's dive in!