There are some major differences between the normal method and constructor. The constructor has the same name as the class. The constructor doesn’t have a return type. A constructor is automatically called when the object is created .23 Şub 2019
Read moreHow do you add a constructor in darts?
It is option to declare within the class. All class have own constructor but if we don’t declare or forget then Dart compiler will create default constructor automatically by passing the default value to the member variable.
Read moreWhat is factory constructor in flutter?
Save. Factory Method is referred as a creational design pattern which provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created . Also known as virtual constructors.
Read moreWhat does factory method do in Dart?
The Factory Method pattern, sometimes referred to as the Virtual Constructor pattern, provides a way to conceal an object’s creation logic from client code , but the object returned is guaranteed to adhere to a known interface.
Read moreWhat is use of factory in flutter?
Factory Method lets a class defer instantiation to subclasses . … When objects are created within the class, it is very inflexible since you cannot change the instantiation of the object independently from the class — the class is committed to a particular object.
Read moreWhat are constructors use for?
Constructor is used to initializing objects of a class and allocate appropriate memory to objects . That is, it is used to initialize the instance variables of a class with a different set of values but it is not necessary to initialize.
Read moreHow many constructors can a class have in Dart?
You can only have one unnamed constructor, but you can have any number of additional named constructors in Flutter . By using named constructor you can create multiple constructors in the same class. Each constructor will have a unique name. So that you can identify each of them.6 Nis 2018
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