Dart

Overview

Dart is a programming language developed by Google, optimized for building user interfaces. It's the official language for the Flutter framework.

Specifications

Property	Value
Docker Image	dart:stable
Version	Dart 3.10.2
Rootfs Size	1000 MB
Execution	JIT compiled
File Extension	.dart
Run Command	dart run {file}
Execution Time	~433ms

1. Create Rootfs from Docker

sudo infra.operator rootfs from-docker --name dart --image dart:stable --size 1000

2. Create Snapshot

sudo infra.operator snapshot create --lang dart --mem 512 --vcpus 1

3. Upload rootfs to S3

sudo infra.operator rootfs upload --lang dart --bucket runner-codes

3. Upload snapshot to S3

sudo infra.operator snapshot upload --lang dart --bucket runner-codes

4. Test Execution

sudo infra.operator host --lang dart --code 'import "dart:io"; void main() { print("Hello from Dart ${Platform.version}"); }' --mem 512 --vcpus 1 --snapshot

Examples

Hello World

Simple main function with print

void main() {
  print("Hello World");
}

Variaveis

Variable types and const declarations

void main() {
  var name = "Dart";  // Tipo inferido
  String language = "Dart";  // Tipo explicito
  final version = 3.2;  // Constante runtime
  const pi = 3.14159;  // Constante compile-time

  print("$name version $version");
}

Funcoes

Functions with named and optional parameters

int add(int a, int b) => a + b;

String greet({required String name, int age = 0}) {
  return "Hello $name, age $age";
}

void main() {
  print(add(2, 3));
  print(greet(name: "Alice", age: 30));
}

Classes

Class with constructor and methods

class Person {
  String name;
  int age;

  Person(this.name, this.age);

  void introduce() {
    print("Hi, I'm $name and I'm $age years old");
  }
}

void main() {
  var person = Person("Bob", 25);
  person.introduce();
}

Async/Await

Async function with Future

Future<String> fetchData() async {
  await Future.delayed(Duration(milliseconds: 100));
  return "Data loaded!";
}

void main() async {
  var data = await fetchData();
  print(data);
}

Limitacoes

• Sem Flutter/UI frameworks
• Sem acesso a rede (http package bloqueado)
• Timeout padrao de 10 segundos
• Memoria limitada a 512MB