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a simple sorting algorithm that people use to manually sort cards in a bridge hand
an efficient, general-purpose sorting algorithm
a highly efficient sorting algorithm, based on partitioning of array of data into smaller arrays
represent an operation to be performed on the elements of an object structure. visitor lets you define a new operation without changing the classes of the elements on which it operates
define the skeleton of an algorithm in an operation, deferring some steps to subclasses. template method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure
define a family of algorithms, encapsulate each one, and make them interchangeable. strategy lets the algorithm vary independently from clients that use it
allow an object to alter its behavior when its internal state changes. the object will appear to change its class
An (optional) include file to enhance error code handling experience.
define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically
define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically
without violating encapsulation, capture and externalize an object's internal state so that the object can be restored to this state later
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
Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation
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.
A native implementation of neural networks in pure MQL, bundled with an easy to use interface, with easy support of saving and loading of the network configurations after training.
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
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.
Compose objects into tree structures to represent part-whole hierarchies.