mit-mit

import 'dart:math' as math;

sealed class Shape {
}

class Square extends Shape {
  final double length;
  Square(this.length);
}

mit-mit

extension ListAdd1 on List {
  void add1(element) {
    add(element);
  } 
}

extension ListAdd2<T> on List<T> {
  void add2(T element) {
    add(element);
  }

mit-mit

final foo = Foo();
final bar = Bar();

class Foo {
  final i = bar; 
}
class Bar {}

void main() {
  print('Hello with $foo and $bar');

mit-mit

void main() {
  final urlString = "http://example.com\\.google.com";
  final uri = Uri.parse(urlString);
  print('Host: ${uri.host}');
  print('Ends with google.com: ${uri.host.endsWith('.google.com')}');  
}

mit-mit

void main() {
  const greeting = 'Hello, World!';
  print(greeting);
}