Design Pattern Interactive Lab

Test runtime behavioral and structural patterns in action: Strategy discounts, Decorator coffee wrappers, and Observer event broadcasters.

Strategy Pattern: Interchangeable Pricing Algorithms

The ShoppingCart context delegates calculation to an IDiscountStrategy interface without hardcoded if/else statements.

Select Concrete Strategy:

Computed Cart Total

$90.00

Base Subtotal: $100.00 • Applied Strategy: FLAT10DiscountStrategy

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