Design Patterns

These are design patterns in their simplest form. Currently the bold items are ones I have examples for.

More will come later on.

abstract_factory - Creates families of related objects.
adapter - Lets classes work together that don't have compatible interfaces.
builder - Separate construction of complex objects.
command - Add parameters to clients with different requets, and undoable operations.
composite - Composer objects in a tree structure and handle them individually.
decorator - Add more responsibility to objects dynamically.
dependency_injection - Easily share "services" across a platform. (DI, aka IoC/Inversion of Control)
facade - Makes subsystems easier to use.
factory - Creates a single subclass with that are similar.
front_controller - Most MVC's and web applications use this pattern.
iterator - Access elements of an aggregate object without knowing whats under the hood.
memento - No encapsulation, allows you to change an objects internal state and restore it.
observer - (aka Publish/Subscribe) One to Many Dependency to notify that an object has changed.
prototype - Create new object by cloning from a skeleton of an object.
proxy - Placeholder for another object to acccess it.
singleton - Only allow one instance for an objects lifespan.
state - Alter an object when it changes state.
template method - Subclasses can redfine certain steps of without messing up the main structure.
visitor - New operations defined without change classes or elements it operates on.

About the Patterns

This is made to understand patterns as simple as possible. So here are a few things to know:

Notes are provided in the class.
I will not be using namespaces to keep it simple.
At the bottom of the class contain examples.
The name of the pattern is the name of the class.
Classes not requiring Abstract Classes and Interfaces are not included to keep it simple.
You would generally do this:
- In most cases, change the name of the class(es).
- Put your classes in separate files.
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(c) 2016 Jesse Boyer | MIT License