In Factory pattern, we create object without exposing the creation logic to the client and refer to newly created object using a common interface.
Read moreWhat is meant by factory method?
Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes . Factory Method defines a method, which should be used for creating objects instead of direct constructor call ( new operator).
Read moreWhen would you use a factory constructor flutter?
A factory constructor is a constructor that can be used when you don’t necessarily want a constructor to create a new instance of your class . This might be useful if you hold instances of your class in memory and don’t want to create a new one each time (or if the operation of creating an instance is costly).
Read moreWhat is a factory constructor flutter?
A factory constructor invokes another constructor . Since a factory constructor does not directly create a new instance, it cannot use a constructor initializer list. A normal constructor always returns a new instance of the class.
Read moreWhat is the common class pattern Strategy?
Solution. The Strategy pattern suggests that you take a class that does something specific in a lot of different ways and extract all of these algorithms into separate classes called strategies . The original class, called context, must have a field for storing a reference to one of the strategies.
Read moreWhy do we use command patterns?
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.
Read moreWhat is Bloc pattern in Flutter?
Bloc is a design pattern created by Google to help separate business logic from the presentation layer and enable a developer to reuse code more efficiently . A state management library called Bloc was created and maintained by Felix Angelo.
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