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Learning Dart

Learning Dart

4.4 (10)
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Learning Dart

Learning Dart

4.4 (10)

Overview of this book

Mastering Dart by Projects is a step-by-step guide that aims to give you hands-on knowledge about programming in Dart using an example-based approach.If you want to become a web developer, or perhaps you already are a web developer but you want to add Dart to your tool belt, then this book is for you. This book assumes that you have at least some knowledge of HTML and how web applications work. Some previous programming experience, preferably in a modern language like C#, Java, Python, Ruby, or JavaScript, will also give you a head start. You can also work with Dart on your preferred platform, be it Linux, Mac OS X, or Windows.
Table of Contents (14 chapters)
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13
Index

A touch of class – how to use classes and objects

We saw in Chapter 1, Dart – A Modern Web Programming Language, how a class contains members such as properties, a constructor, and methods (refer to banking_v2.dart). For those familiar with classes in Java or C#, it's nothing special and we can see already certain simplifications:

  • The short constructor notation lets the parameter values flow directly into the properties:
    BankAccount(this.owner, this.number, this.balance) { … }
  • The keyword this is necessary here and refers to the actual object (being constructed), but it is rarely used elsewhere (only when there is a name conflict). Initialization of instance variables can also be done in the so-called initializer list, in this shorter version of the constructor:
    BankAccount(this.owner, this.number, this.balance): dateCreated = new DateTime.now();
  • The variables are initialized after the colon (:) and are separated by a comma. You cannot use the keyword this in the initializer...

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