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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

Using Lawndart


IndexedDB doesn't (yet) work on all browsers. What if you don't know what browser your clients will use? Can we still provide universal offline key-value storage? The solution is Lawndart (https://github.com/sethladd/lawndart), a pub package that you can import in your app, which has been developed by Seth Ladd as a Dart reworking of Lawnchair. Lawndart presents an asynchronous, but consistent, interface to local storage, IndexedDb, and Web SQL. Your app simply works with an instance of the class Store and the factory constructor will try IndexedDB, Web SQL, and then, finally, local storage. This is implemented in Spiral s05_1; the only change with Spiral s05 is that IndexedDB (idb.dart) is replaced with Lawndart (lawndart.dart). For example, the load method is now written as:

Future load() {
    Stream dataStream = _store.all();
    return dataStream.forEach((taskMap) {      
      var task = new Task.fromDb(taskMap);
      tasks.add(task);
    });
}
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