📄️ Introduction
Behavioral design patterns focus on how objects collaborate, communicate, and interact to achieve a particular behavior in a system. They are like choreography instructions that define the steps and coordination among different components to accomplish a specific outcome in a software application.
📄️ Chain of Responsibility Pattern
The Chain of Responsibility Pattern is like passing a request down a line of people, where each person decides whether to handle the request or pass it to the next person. It allows a chain of objects to process a request, and each object in the chain can choose to handle the request or pass it along. It's a way of organizing code to make it flexible and extensible, like a relay race for tasks.
📄️ Command Pattern
The Command Pattern is like giving your TV remote control to someone else to operate on your behalf. It allows you to encapsulate requests as objects, making it easy to send different commands without knowing the details of how they are executed. It's a way of turning actions into objects, providing flexibility and enabling features like undo/redo functionalities.
📄️ Interpreter Pattern
The Interpreter Pattern is like having a language translator that helps you understand a language you're not familiar with. It allows you to define a grammar for interpreting expressions and provides a way to evaluate these expressions. It's a way of building a language interpreter for specific tasks, making it easier to work with complex rules or conditions.
📄️ Iterator Pattern
The Iterator Pattern is like scrolling through a playlist on your music app – it provides a way to access elements of a collection one by one without needing to know the collection's internal structure. It allows you to move through items in a systematic manner, making it easier to iterate over various data structures like lists or arrays. It's a convenient tool for navigating and processing elements in a collection without worrying about the underlying details.
📄️ Mediator Pattern
The Mediator Pattern is like having a central coordinator at a party who helps guests communicate without directly talking to each other. It provides a way for objects to interact through a mediator, making complex systems more organized. Instead of every object communicating with every other object, they go through the mediator, simplifying the communication flow.
📄️ Memento Pattern
The Memento Pattern is like taking a snapshot of a document while you're editing it so that you can revert to that state later if needed. It allows objects to capture their internal state and store it externally, preserving a moment in time. It's like having a "save" option for your objects, enabling you to undo changes or restore them to a previous state.
📄️ Observer Pattern
The Observer Pattern is like subscribing to your favorite magazine – you get notified whenever a new issue is out, and you don't need to check constantly. It allows one object (the subject) to notify a list of other objects (observers) about any changes in its state. This pattern is useful for creating systems where multiple parts need to react to changes in another part, enabling a more dynamic and responsive interaction between components.
📄️ State Pattern
The State Pattern is like a traffic light changing colors based on the current situation – it allows an object to alter its behavior when its internal state changes. Instead of having a single, monolithic class with a lot of if-else statements, the state pattern lets an object represent its various states as separate classes, making it easier to manage and extend. It's like having different modes for your device, where it behaves differently depending on its current state.
📄️ Strategy Pattern
The Strategy Pattern is like having different strategies for playing a game – you can choose the best strategy based on the situation. It allows you to define a family of algorithms, encapsulate each one, and make them interchangeable. This pattern lets you choose the appropriate strategy at runtime, making your code more flexible and adaptable to different scenarios.
📄️ Template Method Pattern
The Template Method Pattern is like following a recipe with some steps already decided but allowing variations in certain ingredients. It provides a skeleton for an algorithm but allows specific steps to be customized by subclasses. This way, you have a predefined structure, but the exact implementation can be adapted to fit different situations.
📄️ Visitor Pattern
The Visitor Pattern is like having a guest who can perform different tasks in each room of your house without you changing anything about the rooms themselves. It allows you to define operations on elements of a complex structure without altering their classes. With this pattern, you can visit different parts of a structure with a visitor object and perform specific actions, promoting flexibility and maintainability.