To check the type of a variable in Flutter and Dart, you can use the runtimeType property .
Read moreWhat is type in Flutter?
Type objects represent types . A type object can be created in several ways: By a type literal, a type name occurring as an expression, like Type type = int; , or a type variable occurring as an expression, like Type type = T; . By reading the run-time type of an object, like Type type = o. runtimeType; .
Read moreWhat is dynamic data type in Flutter?
dynamic: can change TYPE of the variable, & can change VALUE of the variable later in code . var: can’t change TYPE of the variable, but can change VALUE of the variable later in code. final: can’t change TYPE of the variable, & can’t change VALUE of the variable later in code.
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 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 more