Understanding Design Patterns - Abstract Factory

Provide an interface for creating families of related or dependent objects without specifying their concrete classes

Understanding Design Patterns - Adapter

The hotel staff was quite courteous but they informed her that they don't and Marina would have to buy one from the local hardware

Understanding Design Patterns - Command

The result is havoc with every man fighting for himself instead of the group fighting as a group and protecting each other

Understanding Design Patterns - Composite

Let us take as an example two toys products wrapped in a small box individually and then the two small boxes are placed into a big box

Understanding Design Patterns - Decorator

black coffee is not really a popular choice because of its overpowering bitter taste. Most people prefer to have milk in their coffee

Understanding Design Patterns - Facade

There was one time when his colleague saw Eric rushing back into the office after he had logged out of work for the day

Understanding Design Patterns - Factory Method

but let the classes that implement the interface decide which class to instantiate. The Factory method lets a class defer instantiation

Understanding Design Patterns - Iterator

Provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation

Understanding Design Patterns - Observer

Mary explained that she has to make several trips to the baby's room last night to make sure that the baby is fine. Obviously

Understanding Design Patterns - Simple Factory

they're a pioneer in toy manufacturing. They started production at a time when few toys were being produced commercially

Understanding Design Patterns - Singleton

You may argue that we can always just create another instance of TicketPrinter but how can you make sure everyone follows that

Understanding Design Patterns - State

John works as a customer support representative in a popular telephone support company. In a customer-service-oriented company