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What Are Design Patterns?
Proven, reusable solutions to common design problems.
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AiTechWorlds
AiTechWorlds
Design patterns are proven, reusable solutions to common software design problems. This visual guide covers the three categories — creational, structural, and behavioral — and key patterns like Singleton, Factory, Observer, and Strategy.
Proven, reusable solutions to common design problems.
A shared vocabulary and tested solutions.
Creational, structural, and behavioral.
Control how objects are created.
Ensure only one instance exists.
Create objects without specifying exact classes.
Construct complex objects step by step.
Compose objects into larger structures.
Make incompatible interfaces work together.
Add behavior without changing the class.
Provide a simple interface to complex code.
Manage how objects interact.
Notify subscribers when state changes.
Swap algorithms at runtime.
Encapsulate actions as objects.
Change behavior when internal state changes.
Use them only when they fit.
Principles guide; patterns are specific.
Common bad solutions to avoid.
Learn a few patterns and spot them in real code.
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