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Book Overview & Buying
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Table Of Contents
Design Patterns and Best Practices in Rust
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In this chapter, we examined behavioral design patterns and how they help define the communication and interaction between objects. We explored five key patterns through our Correct Calculator project, showing how they can enhance an application's flexibility, maintainability, and feature set.
First, we looked at the Command pattern, which encapsulates operations as objects. We saw how this allowed us to implement undo/redo functionality and maintain operation history. By representing each calculator operation as a command object with execute and undo methods, we created a system that could track and reverse operations, greatly enhancing the user experience.
Then we explored the Chain of Responsibility pattern, which creates a pipeline of handlers that can process requests. We implemented this to handle different types of calculator input, from simple expressions to variable assignments and special commands. This made our input processing system more flexible...