Jonathan Sande - Dart Apprentice

First Edition

By Jonathan Sade & Matt Galloway

By Matt Galloway & Jonathan Sande

Copyright 2020 Razeware LLC

All rights reserved. No part of this book or corresponding materials (such as text, images, or source code) may be reproduced or distributed by any means without prior written permission of the copyright owner.

This book and all corresponding materials (such as source code) are provided on an as is basis, without warranty of any kind, express of implied, including but not limited to the warranties of merchantability, fitness for a particular purpose, and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in action of contract, tort or otherwise, arising from, out of or in connection with the software or the use of other dealing in the software.

All trademarks and registered trademarks appearing in this book are the property of their own respective owners.

"To the greatest coder of them all."

Jonathan Sande

Jonathan Sande knows what its like to bang his head against a wall because his app isnt working. He also understands the all-too-frequent feeling of still being completely lost even with twenty-seven browser tabs open. Once he finally does understand a topic, though, he enjoys writing the explanations and directions he wishes he had had when he started. Jonathan doesnt like wasting time rebuilding the same app on multiple platforms and in different programming languages, so thats why he uses Dart for mobile apps, Dart for desktop apps, Dart for the web and Dart on the server. Youd have a hard time convincing him to ever go back. Online he usually goes by the name Suragch, which is a Mongolian word meaning "student", a reminder to never stop learning. In his free time he also also enjoys studying human languages, reading about microbiology and discussing deep topics with open-minded people.

John Bennedict (JB) Lorenzo is the tech editor of this book. He is a mobile expert currently based in Berlin, but was born in the Philippines, where he began his career in tech. In his free time he does latin dancing, calisthenics, and traveling. He enjoys experiencing different cultures via food, language, stories, and travel.

Chris Belanger is an editor of this book. He is the former Editor-in-Chief of raywenderlich.com and now Chief Marketing Officer. In the programming world, Chris has over 25 years of experience with multiple database platforms, real-time industrial control systems, and enterprise healthcare information systems. When he kicks back, you can usually find Chris with guitar in hand, looking for the nearest beach, or exploring the lakes and rivers in his part of the world in a canoe.

Vicki Wenderlich is the designer and artist of the cover of this book. She is Rays wife and business partner. She is a digital artist who creates illustrations, game art and a lot of other art or design work for the tutorials and books on raywenderlich.com. When shes not making art, she loves hiking, a good glass of wine and attempting to create the perfect cheese plate.

By purchasing Dart Apprentice, you have the following license:

• You are allowed to use and/or modify the source code in Dart Apprentice in as many apps as you want, with no attribution required.

• You are allowed to use and/or modify all art, images and designs that are included in Dart Apprentice in as many apps as you want, but must include this attribution line somewhere inside your app: Artwork/images/designs: from Dart Apprentice, available at www.raywenderlich.com.

• The source code included in Dart Apprentice is for your personal use only. You are NOT allowed to distribute or sell the source code in Dart Apprentice without prior authorization.

• This book is for your personal use only. You are NOT allowed to sell this book without prior authorization, or distribute it to friends, coworkers or students; they would need to purchase their own copies.

All materials provided with this book are provided on an as is basis, without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

All trademarks and registered trademarks appearing in this guide are the properties of their respective owners.

This section tells you a few things you need to know before you get started, such as what youll need for hardware and software, where to find the project files for this book, and more.

To follow along with this book, youll need the following:

• Dart SDK: A minimum version of 2.12.0 is required.

• Visual Studio Code: This book uses Visual Studio Code for all the examples. But you can use any other IDE if you prefer.

• Dart Extension for VS Code: To enable Dart in Visual Studio Code, youll need to install the corresponding extension.

The materials for this book can be cloned or downloaded from the GitHub book materials repository:

• https://github.com/raywenderlich/da-materials/tree/editions/1.1

Weve also set up an official forum for the book at forums.raywenderlich.com. This is a great place to ask questions about the book or to submit any errors you may find.

Isnt the platypus an amazing animal? Think about it. The platypus is one of only two mammals that lay eggs rather than bear their offspring. Theyre practically blind and deaf, but are able to locate their prey through electroreception (like some dolphins!). Theyre also one of the few existing venomous mammals in the world.

When European naturalists first encountered them (they live in Australia, Tasmania and New Guinea) and examined a preserved platypus body in 1799, the naturalists thought the platypus was a hoax made up of several parts of different animals sewn together.