[EN] Design Patterns Series

Saturday. December 11, 2021 - 1 min

Let’s understand what it’s design patterns first :)

Design Patterns

The Design patterns concept was introduced by GoF (Gang of Four) on the book Design Patterns: Elements of Reusable Object-Oriented Software. Design Patterns are solutions for certain software problems.

The book shows 23 design patterns and they are classified into 3 categories.

Classification

Creational pattern;
Structural pattern;
Behavioral pattern;

Creational Pattern

It provides object creational mechanisms to rise the code flexibility and reusability, such as:

works with the base on the mode the objects can be created;
isolates the object creation details;
the code is independent of the object type to be created.

Example: Singleton

Structural Pattern

It provides how to assemble objects and classes into larger structures, while still keeping flexible and efficient structures, such as:

determines the design of objects and class structures to be composed and to reach a wide result;
the focus is to simplify the structure and identify the relationship between classes and objects
it focuses on heritage and class composition;

Example: Adapter

Behavioral Pattern

It ensures efficiet comunication and identification of responsability between objects, such as:

it’s concerned about the interaction between objects and their responsibilities;
the objects might be able to interact and therefore, they have to have loose coupling

Example: Observer

Thank you for reading <3

Beatriz Uezu

Software Engineer