Design patterns are solutions to common problems that occur in software design. They are not complete designs of a system, but rather a template for how to solve a problem. They are often used to communicate design ideas between developers. They are also a great way to ensure that your code is maintainable and extensible.
There are three main types of design patterns:
- Creational
- Structural
- Behavioral
Creational design patterns are concerned with the creation of objects. They are used to create objects in a way that is suitable for a given situation without revealing the creation method. The normal approach for creating an object might lead to complexities in the design of a project. These patterns allow flexibility in deciding which objects need to be created for a specific use case by providing control over the creation process.
- When you want to create objects without exposing the creation logic to the client
- When you want to create objects without specifying the exact class of the object to be created
Structural design patterns are concerned with the structure of objects. They are used to form larger structures from simple objects. They are used to simplify the design of a system by identifying the relationships between objects and classes. They are also used to identify the relationships between objects and classes.
- When you want to represent a complex structure as a single object
Behavioral design patterns are concerned with the communication between objects and classes. They are used to simplify the design of a system by identifying the relationships between objects and classes. They are also used to identify the relationships between objects and classes.
- When you want to represent a complex structure as a single object