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DART Cookbook

DART Cookbook

By : Ivo Balbaert
4 (2)
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DART Cookbook

DART Cookbook

4 (2)
By: Ivo Balbaert

Overview of this book

If you are a Dart developer looking to sharpen your skills, and get insight and tips on how to put that knowledge into practice, then this book is for you. You should also have a basic knowledge of HTML, and how web applications with browser clients and servers work, in order to build dynamic Dart applications.
Table of Contents (13 chapters)
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12
Index

Using complex numbers


Dart has no built-in type for complex numbers, but it is easy to build your own. The complex_numbers library (based on similar libraries by Tiago de Jesus and Adam Singer) provides constructors, utility methods, and four arithmetic operations both defined as operators and static methods.

How to do it...

We now define a ComplexNumber class, containing all utility methods for normal usage:

library complex_numbers;

import 'dart:math' as math;

class ComplexNumber {
  num _real;
  num _imag;

// 1- Here we define different ways to build a complex number:
  // constructors:
     ComplexNumber([this._real = 0, this._imag = 0]);
    ComplexNumber.im(num imag) : this(0, imag);
     ComplexNumber.re(num real) : this(real, 0);

// 2- The normal utility methods to get and set the real and         // imaginary part, to get the absolute value and the angle, to      // compare two complex numbers:
  num get real => _real;
  set real(num value) => _real = value;

  num get imag...

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