Constructors
Explore how constructors in Dart initialize objects efficiently. Learn generative constructors with concise syntax, create named constructors for specific use cases, and understand initializer lists to ensure safe field initialization. Understand Dart's automatic garbage collection and avoid manual destructors.
We'll cover the following...
In our previous lesson, we assigned values to an object's instance variables one by one using dot notation. As programs grow, this approach becomes repetitive and error-prone. To solve this, we use constructors.
In Dart, constructors are special functions within a class responsible for initializing the instance variables of an object when it is created. A constructor must have the exact same name as the class. Because it is designed solely to create and initialize an instance, it does not have a return type and cannot return a value.
Dart offers multiple types of constructors. We will explore two common types: generative constructors and named constructors.
Generative constructors
The most common form of a constructor is the generative constructor. It creates a new instance of a class and assigns values to its instance variables.
Modern Dart provides a ...