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1 Dart#dartTable of ContentsAbout1 Chapter 1: Getting started with dart2 Remarks2 Links2 Documentation2 FAQ3 Versions3 Examples5 Installation or Setup5 Automated installation and updates5 Manual install5 Hello, World!5 Http Request6 Html6 Dart6 Example6 Getters and Setters6 Chapter 2: Asynchronous Programming8 Examples8 Returning a Future using a Completer8 Async and Await8 Converting callbacks to Futures9 Chapter 3: Classes10 Examples10 Creating a class10 Members10 Constructors11 Chapter 4: Collections13 Examples13 Creating a new List13 Creating a new Set13 Creating a new Map13 Map each element in the a list14 Chapter 5: Comments16 Syntax16 Remarks16 Examples16 End of Line Comment16 Multi-Line Comment16 Documentation using Dartdoc16 Chapter 6.

2 Control Flow18 Examples18If Else18 While Loop18 For Loop19 Switch Case19 Chapter 7: Converting Data21 Examples21 JSON21 Chapter 8: Dart-JavaScript interoperability22 Introduction22 Examples22 Calling a global function22 Wrapping JavaScript classes/namespaces22 Passing object literals23 Chapter 9: Date and time24 Examples24 Basic usage of DateTime24 Chapter 10: Enums25 Examples25 Basic usage25 Chapter 11: Exceptions26 Remarks26 Examples26 Custom exception26 Chapter 12: Functions27 Remarks27 Examples27 Functions with named parameters27 Function scoping27 Chapter 13: Libraries29 Remarks29 Examples29 Using libraries29 Libraries and visibility29 Specifying a library prefix30 Importing only part of a library30 Lazily loading a library30 Chapter 14: List Filters32 Introduction32 Examples32 Filtering a list of integers32 Chapter 15: Pub33 Remarks33 Examples33pub build33pub serve33 Chapter 16: Regular Expressions34 Syntax34 Parameters34 Remarks34 Examples34 Create and use a Regular Expression34 Chapter 17.

3 Strings35 Examples35 Concatenation and interpolation35 Valid strings35 Building from parts35 Credits37 AboutYou can share this PDF with anyone you feel could benefit from it, downloaded the latest version from: dartIt is an unofficial and free dart ebook created for educational purposes. All the content is extracted from Stack Overflow Documentation, which is written by many hardworking individuals at Stack Overflow. It is neither affiliated with Stack Overflow nor official content is released under Creative Commons BY-SA, and the list of contributors to each chapter are provided in the credits section at the end of this book.

4 Images may be copyright of their respective owners unless otherwise specified. All trademarks and registered trademarks are the property of their respective company the content presented in this book at your own risk; it is not guaranteed to be correct nor accurate, please send your feedback and corrections to 1: Getting started with dartRemarksDart is an open-source, class-based, optionally-typed programming language for building web applications--on both the client and server--created by Google. Dart s design goals are:Create a structured yet flexible language for web programming.

5 Make Dart feel familiar and natural to programmers and thus easy to learn. Ensure that Dart delivers high performance on all modern web browsers and environments ranging from small handheld devices to server-side execution. Dart targets a wide range of development scenarios, from a one-person project without much structure to a large-scale project needing formal types in the code to state programmer support this wide range of projects, Dart provides the following features and tools:Optional types: this means you can start coding without types and add them later as needed.

6 Isolates: concurrent programming on server and client Easy DOM access: using CSS selectors (the same way that jQuery does it) Dart IDE Tools: Dart plugins exist for many commonly used IDEs, Ex: WebStorm. Dartium: a build of the Chromium Web Browser with a built-in Dart Virtual Machine LinksThe Dart Homepage Official Dart News & Updates The Dartosphere - A collection of recent Dart blog posts Dartisans Dartisans community on Google+ Dart Web Development - Google Groups Page Dart Language Misc - Google Groups Page DartLang sub-Reddit DocumentationTour of the Dart Language Tour of the Dart Libraries Dart Code samples Dart API Reference Asked Questions VersionsVersionRelease or SetupThe Dart SDK includes everything you need to write and run Dart code.

7 VM, libraries, analyzer, package manager, doc generator, formatter, debugger, and more. If you are doing web development, you will also need installation and updatesInstalling Dart on Windows Installing Dart on Mac Installing Dart on Linux Manual installYou can also manually install any version of the , World!Create a new file named with the following content:void main() { print('Hello, World!'); }In the terminal, navigate to the directory containing the file and type the following:dart enter to display Hello, World! in the terminal RequestHtml<img id="cats"> </img>Dartimport 'dart:html'; /// Stores the image in [blob] in the [ImageElement] of the given [selector].

8 Void setImage(selector, blob) { FileReader reader = new FileReader(); ((fe) { ImageElement image = (selector); = ; }); (blob); } main() async { var url = " "; // Initiates a request and asynchronously waits for the result. var request = await (url, responseType: 'blob'); var blob = ; setImage("#cats", blob); }Examplesee Example on and Settersvoid main() { var cat = new Cat(); print("Is cat hungry? ${ }"); // Is cat hungry? true print("Is cat cuddly? ${ }"); // Is cat cuddly? false print("Feed cat."); = false; print("Is cat hungry?)}

9 ${ }"); // Is cat hungry? false print("Is cat cuddly? ${ }"); // Is cat cuddly? true } class Cat { bool _isHungry = true; bool get isCuddly => !_isHungry; bool get isHungry => _isHungry; bool set isHungry(bool hungry) => = hungry; }Dart class getters and setters allow APIs to encapsulate object state dartpad example here: Getting started with dart online: 2: Asynchronous ProgrammingExamplesReturning a Future using a CompleterFuture<Results> costlyQuery() { var completer = new Completer(); ("SELECT * FROM giant_table", (results) { // when complete (results); }, (error) { (error); }).

10 // this returns essentially immediately, // before query is finished return ; }Async and Awaitimport 'dart:async'; Future main() async { var value = await _waitForValue(); print("Here is the value: $value"); //since _waitForValue() returns immediately if you un it without await you won't get the result var errorValue = "not finished yet"; _waitForValue(); print("Here is the error value: $value");// not finished yet } Future<int> _waitForValue() => new Future((){ var n = 100000000; // Do some long process for (var i = 1; i <= n; i++) { // Print out progress: if ([n / 2, n / 4, n / 10, n / 20].))}