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What’s a design pattern?#

Design patterns are sort of blueprints that by customization you can solve a recurring design problem.

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Catalog of design patterns#

The catalog of Gang-of-Four (the same refernce as mentioned above) classifies the design patterns as follows:

Creational patterns Structural patterns Behavioral patterns
These patterns can be either class-creation patterns or object-creational patterns. Increase flexibility and reuse of existing code by providing various object creation mechanismThese patterns are designed with regard to a class's structure and composition. Explain how to assemble objects and classes into larger structures while keeping these structures flexible and efficient.These patterns are designed depending on how one class communicates with others. These patterns are concerned with algorithms and the assignment of responsibilities between objects.