Summary

A table of one-liners to help summarize the design patterns in the course.

Pattern	Description
Abstract Factory	Adds an abstraction over many other related objects that are created using other creational patterns.
Adapter	An alternative interface over an existing interface.
Bridge	The Bridge pattern is similar to the Adapter pattern except in the intent that you developed it.
Builder	A creational pattern whose intent is to separate the construction of a complex object from its representation so that you can use the same construction process to create different representations.
Chain of Responsibility	Pass an object through a chain of successor handlers.
Command	An abstraction between an object that invokes a command, and the object that performs it. Useful for UNDO/REDO/REPLAY.
Composite	A structural pattern useful for hierarchical management.
Decorator	Attach additional responsibilities to an object at runtime.
Facade	An alternative or simplified interface over other interfaces.
Factory	Abstraction between the creation of an object and where it is used.
Flyweight	Share objects rather than creating thousands of near identical copies.
Interpreter	Convert information from one language to another.
Iterator	Traverse a collection of aggregates.
Mediator	Objects communicate through a Mediator rather than directly with each other.
Memento	Save a copy of state and for later retrieval. Useful for UNDO/REDO/LOAD/SAVE.
Observer Pattern	Manage a list of dependents and notifies them of any internal state changes.
Prototype	Good for when creating new objects requires more resources than you need of have available.
Proxy	A class functioning as an interface to another class or object.
Singleton	A class that can be instanced at any time, but after it is first instanced, any new instances will point to the original instance.
State	Alter an objects' behavior by changing the handle of one of its methods to one of its subclasses dynamically to reflect its new internal state.
Strategy	Similar to the State Pattern, except that the client passes in the algorithm that the context should then run.
Template Method	An abstract class (template) that contains a method that is a series of instructions that are a combination of methods that can be overridden.
Visitor	Pass an object called a visitor to a hierarchy of objects and execute a method on them.

Remember that design patterns will give you a useful and common vocabulary for when designing, documenting, analyzing, restructuring new and existing software development projects now and into the future.

Good luck and I hope that your projects become very successful.

Sean Bradley