Dart Manual Install
You can also manually install any version of the SDK.
Hello, World!
Create a new file named hello_world.dart with the following content:
void main() {
print('Hello, World!');
}In the terminal, navigate to the directory containing the file hello_world.dart and type the following:
dart hello_world.dartHit enter to display Hello, World! in the terminal window.
Http Request
Html
<img id="cats"></img>Dart
import 'dart:html';
/// Stores the image in [blob] in the [ImageElement] of the given [selector].
void setImage(selector, blob) {
FileReader reader = new FileReader();
reader.onLoad.listen((fe) {
ImageElement image = document.querySelector(selector);
image.src = reader.result;
});
reader.readAsDataUrl(blob);
}
main() async {
var url = "https://upload.wikimedia.org/wikipedia/commons/2/28/Tortoiseshell_she-cat.JPG";
// Initiates a request and asynchronously waits for the result.
var request = await HttpRequest.request(url, responseType: 'blob');
var blob = request.response;
setImage("#cats", blob);
}Example
Getters and Setters
void main() {
var cat = new Cat();
print("Is cat hungry? ${cat.isHungry}"); // Is cat hungry? true
print("Is cat cuddly? ${cat.isCuddly}"); // Is cat cuddly? false
print("Feed cat.");
cat.isHungry = false;
print("Is cat hungry? ${cat.isHungry}"); // Is cat hungry? false
print("Is cat cuddly? ${cat.isCuddly}"); // Is cat cuddly? true
}
class Cat {
bool _isHungry = true;
bool get isCuddly => !_isHungry;
bool get isHungry => _isHungry;
bool set isHungry(bool hungry) => this._isHungry = hungry;
}