Strategy Design Pattern in Action: Real-Time Payment Processing

Welcome to our tutorial on the Strategy Design Pattern featuring a real-time example of payment processing. The Strategy pattern enables us to define a family of algorithms, encapsulate each one, and make them interchangeable. This flexibility allows the client to choose the appropriate algorithm dynamically, without altering the client's code.

**Example Overview:**
Imagine a scenario where a software application handles various payment methods such as credit card, PayPal, and bank transfer. Each payment method has its own unique implementation, but the application needs to seamlessly switch between them based on user preferences or other conditions.

**Real-Time Payment Processing:**
- **Credit Card Payment:** We'll illustrate how the Strategy pattern allows us to define a strategy for processing credit card payments. This could involve interacting with a payment gateway, verifying card details, and confirming the transaction.
- **PayPal Payment:** Next, we'll explore how the same application can switch to a PayPal payment strategy when the user opts for this method. The Strategy pattern ensures that the payment processing logic remains encapsulated and interchangeable.
- **Bank Transfer:** Finally, we'll demonstrate how the application seamlessly transitions to a bank transfer payment strategy when required. Again, the Strategy pattern shines by allowing us to easily plug in different algorithms for handling bank transfers.

**Key Benefits and Learning Points:**
- Understand the core concepts of the Strategy Design Pattern.
- Learn how to implement the Strategy pattern in real-world scenarios.
- Discover the advantages of encapsulating algorithms and making them interchangeable.
- Gain insights into designing flexible and maintainable payment processing systems.

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Strategy Design Pattern in Action: Real-Time Payment Processing

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