99 lines
4.0 KiB
Markdown
99 lines
4.0 KiB
Markdown
<img src="logo.png" alt="design patterns logo" align="center" />
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# Design patterns in golang
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>A beginner guide... happy coding!
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## Table of Contents
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- [Creational patterns](#creational-patterns)
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- [Singleton](#singleton)
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- [Builder](#builder)
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- [Factory](#factory)
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- [Abstract Factory](#abstract-factory)
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- [Prototype](#prototype)
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- [Structural patterns](#structural-patterns)
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- [Composition](#composition)
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- [Adapter](#adapter)
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- [Bridge](#bridge)
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- [Behavioral patterns](#behavioral-patterns)
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- [Chain of responsibility](#chain-of-responsibility)
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- [Strategy](#strategy)
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- [Observer](#observer)
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- [State](#state)
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- [Visitor](#visitor)
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- [Mediator](#mediator)
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- [Concurrency patterns](#concurrency-patterns)
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---
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## Creational patterns
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Creational design patterns abstract the instantiation process. They help make a system independent of how its objects are created, composed, and represented.
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### Singleton
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Ensure a class only has one instance, and provide a global point of access to it.
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### Builder
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Separate the construction of a complex object from its representation so that the
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same construction process can create different representations.
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### Factory
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Define an interface for creating an object, but let subclasses decide which class to
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instantiate. Factory Method lets a class defer instantiation to subclasses.
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### Abstract Factory
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Provide an interface for creating famili es of related or dependent objects without
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specifying their concrete classes.
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### Prototype
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Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this protoype.
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## Structural patterns
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Structural patterns are concerned with how classes and objects are composed to form
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larger structures. Structural class patterns use inheritance to compose interfaces or implementations.
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As a simple example, consider how multiple inheritance mixes two or
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more classes into one.
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### Composition
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Compose objects into tree structures to represent part-whole hierarchies. Composite
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lets clients treat individual objects and compositions of objects uniformly.
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### Adapter
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Convert the interfac e of a class into another interface clients expect. Adapter lets
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classes work together that couldn' t otherwise because of incompatible interfaces.
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### Bridge
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Decouple an abstraction from its implementation so that the two can vary independently.
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## Behavioral patterns
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Behavioral patterns are concerned with algorithms and the assignment of responsibilities
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between objects. Behavio ral patterns describe not just patterns of objects or classes
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but also the patterns of communication between them. These patterns characterize
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complex control flow that's difficult to follow at run-time. They shift your focus away
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from flow of control to let you concent ratejust on the way objects are interconnected.
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### Chain of responsibility
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Avoid coupling the sender of a request to its receiver by giving more than one
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object a chance to handle the request. Chain the receiving objects and pass the
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request along the chain until an object handles it.
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### Strategy
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Define a family oafl gorit h ms, encapsulate each one, and make them interchangeable.
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Strategy lets the algorithm vary independently from clients that use it.
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### Observer
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Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically
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### State
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Allow an object alter its behavior when its internal state changes. The object will appear on change its class
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### Visitor
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Represent an operation to be performed on the elements of an object structure.Visitor lets you define new operation without changing the classes of the elements of which operates
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### Mediator
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Define an object that encapsulates how a set of objects interact.Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently
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## Concurrency patterns
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Pattenrs for concurrent work and parallel execution in Go.
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