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 moreHow do you use the factory method?
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 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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