Using collection literals

List, set, and map literals can be parameterized. Parameterized literals arejust like the literals you’ve already seen, except that you add<type> (for lists and sets) or<keyType, valueType> (for maps)before the opening bracket. Here is an example of using typed literals:

var names = <String>['Seth', 'Kathy', 'Lars'];
var uniqueNames = <String>{'Seth', 'Kathy', 'Lars'};
var pages = <String, String>{
  'index.html': 'Homepage',
  'robots.txt': 'Hints for web robots',
  'humans.txt': 'We are people, not machines'
};