Dart
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import 'dart:async';
const Duration delay = const Duration(milliseconds: 200);
Future loadLastName(String firstName) {
return new Future.delayed(delay).then((_) {
return firstName + 'son';
});
}
Future loadLastName2(String firstName) async {
await new Future.delayed(delay);
return firstName + 'son';
}
main() async {
var gregsLastName = await loadLastName('greg');
var stevesLastName = await loadLastName2('steve');
print('greg $gregsLastName');
print('steve $stevesLastName');
}
$ dart async_await.dart greg gregson steve steveson
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