DMITRII PECHERITSA / Profile

Given a language, define a represention for its grammar along with an interpreter that uses the representation to interpret sentences in the language

Encapsulate a request as an object thereby letting you parameterize clients with different requests. Queue or log requests, and support undoable operations

Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it

Provide a surrogate or placeholder for another object to control access to it

Use sharing to support large numbers of fine-grained objects efficiently

Provide a unified interface to a set of interfaces in a subsystem; facade defines a higher-level interface that makes the subsystem easier to use

Attach additional responsibilities to an object dynamically; and provide a flexible alternative to subclassing for extending functionality

Create an object tree which represents part-whole hierarchies, so that the client would treat objects and compositions of objects uniformly.

Decouple an abstraction from its implementation so that the two can vary independently

Convert the interface of a class into another expected interface; classes with incompatible interfaces can work together

A collection of classic creational GoF design patterns

Ensure one instance of a class with a global point of access

Create objects by copying a prototype

An interface for creating an object that defers instantiation to subclasses. They decide which class to instantiate.

For a complex object separate its construction from representation. Same construction process can create different representations

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

Modeling multiple inheritance with the Twin pattern.

Provide a unified interface to a set of interfaces in a subsystem.

Compose objects into tree structures to represent part-whole hierarchies.

A basic container for storing an ordered list of basic data type objects.