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- <title>CodeMirror: Dart mode</title>
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- <li><a class=active href="#">Dart</a>
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- <article>
- <h2>Dart mode</h2>
- <form>
- <textarea id="code" name="code">
- import 'dart:math' show Random;
- void main() {
- print(new Die(n: 12).roll());
- }
- // Define a class.
- class Die {
- // Define a class variable.
- static Random shaker = new Random();
- // Define instance variables.
- int sides, value;
- // Define a method using shorthand syntax.
- String toString() => '$value';
- // Define a constructor.
- Die({int n: 6}) {
- if (4 <= n && n <= 20) {
- sides = n;
- } else {
- // Support for errors and exceptions.
- throw new ArgumentError(/* */);
- }
- }
- // Define an instance method.
- int roll() {
- return value = shaker.nextInt(sides) + 1;
- }
- }
- </textarea>
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