Specifically, using factories provides encapsulation, and means the code is not tied to specific classes or objects , and thus the class hierarchy or prototypes can be changed or refactored without needing to change code that uses them – they abstract from the class hierarchy or prototypes.
Read moreWhat is a factory used for?
A factory, manufacturing plant or a production plant is an industrial site, often a complex consisting of several buildings filled with machinery, where workers manufacture items or operate machines which process each item into another .
Read moreWhy do we use factory constructor in flutter?
A normal constructor always returns a new instance of the class. A factory constructor is permitted to return an existing instance, an instance of a derived class, or null .
Read moreWhat is factory keyword in DART?
A factory function is a function that returns an instance of a class. Dart provides factory keyword to label a default or named constructor . Then it becomes our responsibility to return an instance from this constructor. A factor constructor is generally used to control the instance creation.7 Eki 2019
Read moreWhat is a factory constructor in flutter?
Factory constructors return am instance of the class, but it doesn’t necessarily create a new instance . Factory constructors might return an instance that already exists, or a sub-class. Rules for factory constructors: Factory constructors do use the return key word.
Read moreIs Builder pattern an anti pattern?
When Builder Is an Antipattern Unfortunately, many developers pick only part of the Builder pattern — the ability to set fields individually . The second part — presence of reasonable defaults for remaining fields — is often ignored.
Read moreWhat is builder pattern in Flutter?
A builder is a Flutter design pattern in which the construction code of a widget is defined outside of its class . Builder functions are callback interfaces that pass data (often layout-specific) to the parent widget which returns a child based on that data.
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