davidmigloz

import 'package:collection/collection.dart';

void main() {
  // Mutable set
  final mutableSet = {1, 2, 3, 3};
  mutableSet.forEach((e) => print(e)); // 1 2 3
  // Empty mutable set
  final emptySet = <int>{};
  // Immutable set (copy of the original)
  final immutableSet = Set.unmodifiable({1, 2, 3});

davidmigloz

import 'package:collection/collection.dart';

void main() {
  // Mutable growable list
  final mutableList = [1, 2, 3];
  mutableList.add(499);
  final element = mutableList[3];
  mutableList.length = 2; // truncate
  // Mutable fixed-length list
  final fixedLengthList = List.filled(5, 0);

davidmigloz

Iterable<int> oddNumbers(int num) sync* {
  for (int odd = 1; odd / 2 < num; odd += 2) {
    yield odd;
  }
}

void main() {
  // Synchronous generation function (returns Iterable)
  oddNumbers(3)
      .map((num) {

davidmigloz

extension NumberExtensions on String {
  int parseInt() {
    return int.parse(this);
  }
}

extension ListExtensions<T> on List<T> {
  List<List<T>> split(int at) {
    return [sublist(0, at), sublist(at)];
  }

davidmigloz

abstract class Vehicle {
  String brand;  // Public
  int _year = 0; // Private
  int get year => _year; // Getter
  set year(int value) {  // Setter
    if (value < 0) {
      throw ArgumentError();
    }
    _year = value;
  }

davidmigloz

import 'dart:isolate';

void compute(int num) {
  final isolateName = Isolate.current.debugName;
  print('Isolate $isolateName computing $num...');
}

main() async {
  print('Spawning...');
  final isoFut1 = Isolate.spawn(compute, 1, debugName: "I1");

davidmigloz

Future<String> loadImage(String name) async {
  await Future.delayed(Duration(seconds: 1));
  return "IMAGE$name";
}

displayImages(String image1, String image2) {
  print("$image1 | $image2");
}

void main() async {

davidmigloz

Future<String> requestToken() async {
  await Future.delayed(Duration(seconds: 1));
  return "TOKEN";
}

Future<void> postUserName(String token, String name) async {
  await Future.delayed(Duration(seconds: 1));
}

void main() async {

davidmigloz

greet(String name) => print("Hello $name");

greet2(String person1, [String? person2]) {
  print("Hello $person1");
  if (person2 != null) print("Hello $person2");
}

String getGreeting({String name = "Dart"}) {
  return "Hello $name";
}

davidmigloz

void main() {
  for (var i = 5; i >= 0; i = i - 2) {
    print(i); // 5 3 1
  }
  for (var num in [1, 4, 5, 2]) {
    print(num); // 1 4 5 2
  }
  final set = {"A", "B", "C"};
  set.forEach((letter) {
    print(letter); // A B C