kwalrath

All you need to do in this exercise is replace the TODO comments with either ?? or ??=.
Read the codelab text to make sure you understand both, and then give it a try.

kwalrath

This exercise is fairly straightforward. Just add a list, set, or map literal after each equals sign.
See the codelab text for the correct syntax to use.

kwalrath

Two assignments that need to happen: letterOne should be word[0], and letterTwo should be word[1].

kwalrath

// Say the timestamp in the Travis log looks like this:
//
// travis_time:end:22889f10:start=1559926540498807523,finish=1559926542012374871,duration=1513567348
//
// This program prints the time in local and UTC time zones.

main() {
  int build = (1559926542012374871.0/1e6).toInt();
  var buildDateTime = DateTime.fromMillisecondsSinceEpoch(build);
  print('Local time: $buildDateTime');

kwalrath

RaisedButton(
  child: Text('Click me'),
  onPressed: () {
    final myFuture = http.get('https://example.com');
    myFuture.then((response) {
      if (response.statusCode == 200) {
        print('Success!');
      }
    });
  },

kwalrath

RaisedButton( // (1)
  child: Text('Click me'),
  onPressed: () { // (2)
    final myFuture = http.get('https://example.com');
    myFuture.then((response) { // (3)
      if (response.statusCode == 200) {
        print('Success!');
      }
    });
  },

kwalrath

RaisedButton(
  onPressed: () {
    final myFuture = http.get('https://my.image.url');
    myFuture.then((resp) {
      setImage(resp);
    });
  },
  child: Text('Click me!'),
)

kwalrath

void main() {
  final myFuture = Future(() {
    return 12;
  });
}

kwalrath

void main() {
  final myFuture = Future(() {
    print('Creating the future.'); // Prints second.
    return 12;
  });
  print('Done with main().'); // Prints first.
}

kwalrath

final myFuture = Future.delayed(
  const Duration(seconds: 5),
  () => 12,
);