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Decorator pattern

What is the difference between command and strategy pattern?

1 April 2022 Enpatika.com Genel

The main difference is , the command does some action over the object . It may change the state of an object. While Strategy decides how to process the object. It encapsulates some business logic.

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What is Command pattern in DP?

1 April 2022 Enpatika.com Genel

Command pattern is a data driven design pattern and falls under behavioral pattern category . A request is wrapped under an object as command and passed to invoker object.

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What is a command in Command pattern?

1 April 2022 Enpatika.com Genel

In command pattern there is a Command object that encapsulates a request by binding together a set of actions on a specific receiver . It does so by exposing just one method execute() that causes some actions to be invoked on the receiver.1 Eyl 2021

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What is the Command pattern good for?

1 April 2022 Enpatika.com Genel

The command pattern should be used when: You need a command to have a life span independent of the original request, or if you want to queue, specify and execute requests at different times . You need undo/redo operations. The command’s execution can be stored for reversing its effects.

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What is a Command pattern in Java?

1 April 2022 Enpatika.com Genel

A Command pattern is an object behavioral pattern that allows us to achieve complete decoupling between the sender and the receiver . (A sender is an object that invokes an operation, and a receiver is an object that receives the request to execute a certain operation.

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What is an Observer function C++?

1 April 2022 Enpatika.com Genel

Observer is a behavioral design pattern that allows some objects to notify other objects about changes in their state . The Observer pattern provides a way to subscribe and unsubscribe to and from these events for any object that implements a subscriber interface.

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What is an Observer pattern give an example?

1 April 2022 Enpatika.com Genel

Observer is a behavioral design pattern . It specifies communication between objects: observable and observers. An observable is an object which notifies observers about the changes in its state. For example, a news agency can notify channels when it receives news.

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