ipondroid

void future_forEach(List<String> urls) {
  Future.forEach(urls, (url) {
    print('url:$url');
    http.get(url).then((response) {
      print('statusCode:${response.statusCode}');
    });
  }).catchError((error) { print('$error'); });
}

// output

ipondroid

void future_constructor_delayed() {
  Future.delayed(
    Duration(seconds: 3),
    () => 'Future.delayed(3 secs) done')
    .then((value) { print('$value'); })
    .whenComplete(
      () { print('Future.delayed(3 secs) completed'); });

  Future.delayed(
    Duration(seconds: 10),

ipondroid

class _MyListTiles extends State<MyListTiles> {
  var _checkboxValue = false;
  var _radioValue = 0;
  var _switchValue = false;

  @override
  Widget build(BuildContext context) {
    return ListView(
      padding: EdgeInsets.zero,
      children: <Widget>[

ipondroid

@override
Widget build(BuildContext context) {
  return Scaffold(
    // ...
    endDrawer: Drawer(
      child: Center(child: Text('This is endDrawer')),
    ),
  );
}

ipondroid

ListTile(
    title: Text('one-line with leading widget'),
    leading: GestureDetector(
        onTap: () {
            showDialog(
                context: context,
                builder: (BuildContext context) {
                    return _dialog('Tapped leading');
                }
            );

ipondroid

ListTile(
    title: Text('Item 1'),
    leading: FlutterLogo(),
    onTap: () {
        showDialog(
            context: context,
            builder: (BuildContext context) {
                return _dialog('Tapped Item 1');
            }
        );

ipondroid

class _MyHomePageState extends State<MyHomePage> {
  AlertDialog _dialog(String title) {
    return AlertDialog(
      title: Text(title),
      actions: <Widget>[
        FlatButton(
          child: Text('back'),
          onPressed: () {
            Navigator.pop(context);
          },

ipondroid

transitionBuilder: (Widget child, Animation<double> animation) {
    return FadeTransition(opacity: animation, child: child);
}

ipondroid

class _ClickCounterState extends State<ClickCounter> {
  int _count = 0;
  var keys = [1, 2, 3];
  var colors = [Colors.red, Colors.blue, Colors.green];
  var borderRadius = [50.0, 30.0, 0.0];
  
  Widget createBox(int key) => Container(
    decoration: BoxDecoration(
      color: colors[key],
      borderRadius: BorderRadius.circular(borderRadius[key]),

ipondroid

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('BottomAppBar demo'),
      ),
      body: Center(
        child: Text('body'),
      ),