leosalass-zz

abstract class Animal { }

abstract class Mamifero extends Animal { }
abstract class Ave extends Animal { }
abstract class Pez extends Animal { }

abstract class Volador {
  void volar() => print('estoy volando');
}

leosalass-zz

void main(){
  final motorcycle = new Motorcycle('Kawasaki Ern 600');
  print(motorcycle);
}

abstract class Vehicle {
  String model;
  
  Vehicle(this.model);
  

leosalass-zz

void main(){
  final motorcycle = new Motorcycle();
  
  motorcycle.startEngine();
  print('engine started: ${motorcycle.isEngineStarted}');
  
  motorcycle.stopEngine();
  print('engine started: ${motorcycle.isEngineStarted}');
}

leosalass-zz

import 'dart:math' as math;

void main(){
  final square = new Square(side: 7);
  print('lado: ${square.side}');  
  print('area: ${square.area}');
  
  square.area = 25;
  print('lado: ${square.side}');  
  print('area: ${square.area}');

leosalass-zz

void main(){
  final Map<String, String> map = {
    'name': 'Erik Lehnsherr'
  };
  
  final batman = new Hero.fromJson(map);
  
  print(batman);
}

leosalass-zz

void main(){
  final magneto = new Hero(
    name: 'Erik Lehnsherr',
    power: 'magnetism'
  );
  
  print(magneto);
  
  final unknow = new Hero(
    power: 'super speed'

leosalass-zz

void main() {
  String name = 'Roberto';
  String lastName = 'Gonzalez';
  
  hello(name: name);
  hello(name: name, lastName: lastName);
  hello(lastName: lastName, name: name);}

void hello({
  required String name,

leosalass-zz

void main() {
  hello();
}

void hello({String name = 'no name'}) {
  print( 'Hello $name' );
}

leosalass-zz

void main() {
  const name = 'Leonardo';
  hello( name );  
  print(sum(3,5));
}

void hello(String name) {
  print( 'Hello $name' );
}

leosalass-zz

void main() {
   Map<String, dynamic> persona = {
    'nombre': 'leonardo',
    'apellido': 'salas',
    'edad': 40,
    'true': false
  };  
  print (persona);
  
  persona.addAll({'casado': true});