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Mastering DART

You're reading from   Mastering DART Master the art of programming high-performance applications with Dart

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Product type Paperback
Published in Nov 2014
Publisher Packt
ISBN-13 9781783989560
Length 346 pages
Edition 1st Edition
Languages
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Author (1):
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Sergey Akopkokhyants Sergey Akopkokhyants
Author Profile Icon Sergey Akopkokhyants
Sergey Akopkokhyants
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Toc

Table of Contents (14) Chapters Close

Preface 1. Beyond Dart's Basics 2. Advanced Techniques and Reflection FREE CHAPTER 3. Object Creation 4. Asynchronous Programming 5. The Stream Framework 6. The Collection Framework 7. Dart and JavaScript Interoperation 8. Internalization and Localization 9. Client-to-server Communication 10. Advanced Storage 11. Supporting Other HTML5 Features 12. Security Aspects Index

Ordering of elements


Several collections implicitly support ordering of elements and help in sorting them without any effort. We can find any element with or without the filter predicate or perform a binary search within a sorted array to improve the performance of large collections. We can sort collections by providing a collection-compare function via a comparator or an object-compare method via the Comparable interface.

The Comparable interface

There are many core classes in Dart that support a native comparison via the implementation of the Comparable interface. You can implement the Comparable interface in classes that you have created to use them in collections to prevent unusual results of the sorting operation. Here, we will modify the Entity class to implement the Comparable interface. All we have to do is implement the compareTo method as shown in the following code:

class Entity implements Comparable {
  final int index;

  Entity(this.index);

  int compareTo(Entity other) {
  ...
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