Dart Apprentice First Edition By Jonathan Sade & Matt Galloway Dart Apprentice By Matt Galloway & Jonathan Sande Copyright ©2020 Razeware LLC Notice of Rights 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. Notice of Liability 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. Trademarks All trademarks and registered trademarks appearing in this book are the property of their own respective owners. Dedications "To the greatest coder of them all." — Jonathan Sande About the Authors Jonathan Sande knows what it’s like to bang his head against a wall because his app isn’t 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 doesn’t like wasting time rebuilding the same app on multiple platforms and in different programming languages, so that’s why he uses Dart for mobile apps, Dart for desktop apps, Dart for the web and Dart on the server. You’d 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. About the Editors 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. About the Artist Vicki Wenderlich is the designer and artist of the cover of this book. She is Ray’s 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 she’s not making art, she loves hiking, a good glass of wine and attempting to create the perfect cheese plate. Book License 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. Before You Begin This section tells you a few things you need to know before you get started, such as what you’ll need for hardware and software, where to find the project files for this book, and more.