We've now learned about the three most common collection types in Rust: Vec, String, and HashMap. While each has its own specific use case, they share a common foundation through the Iterator trait. This means they have a rich set of methods for performing common operations like sorting, filtering, and mapping. In this article, we'll explore some of these useful methods.
We've learned how to define structs to store data. Now, let's learn how to add behavior to our structs by defining methods. Methods are functions that are associated with a specific struct and can operate on its data.
It's time to put everything we've learned about structs into practice. In this project, we will model a user account for a web application. This will involve defining a User struct, creating instances of it, and defining methods to interact with the user data.
In Part 1 of this project, we wrote a program that calculates the area of a rectangle using a standalone function. This works, but we can make the code clearer and more organized. The area function is directly related to the Rectangle struct, so it should be a method of the struct.