davidmigloz

void main() {
  print("Hello world!");
}

davidmigloz

void main() {
  bool trueBoolean = true;
  bool falseBoolean = false;
}

davidmigloz

void main() {
  dynamic dynamicVariable = "A string";
  dynamicVariable = 1;
}

davidmigloz

class Point {
  final int x;
  final int y;

  const Point(this.x, this.y);

  Point operator +(Point other) {
    return Point(x + other.x, y + other.y);
  }
}

davidmigloz

void main() {
  var addition = 3 + 2; // 5
  var subtraction = 3 - 2; // 1
  var negation = -1; // -1
  var multiplication = 3 * 2; // 6
  var division = 3 / 2; // 1.5
  var integerDivision = 3 ~/ 2; // 1
  var modulo = 3 % 2; // 1
  modulo++; // 2
  modulo--; // 1

davidmigloz

import 'package:collection/collection.dart';

void main() {
  var gt = 5 > 4; // true
  var lt = 5 < 4; // false
  var list1 = [1, 2, 3];
  var list2 = [1, 2, 3];
  var equality = list1 == list2; // false
  var identity = identical(list1, list2); // false
  var collectionEquality = IterableEquality().equals(list1, list2); // true

davidmigloz

import 'package:collection/collection.dart';

void main() {
  Iterable iterable1 = [1, 2, 3];
  Iterable iterable2 = {1, 2, 3};
  if (iterable1 is List && iterable2 is List) {
    iterable1.shuffle(); // Smart cast from Iterable to List
    print(ListEquality().equals(iterable1, iterable2));
  } else {
    print(IterableEquality().equals(iterable1, iterable2));

davidmigloz

void main() {
  int? nullableNumber = 1;
  int number = nullableNumber!;
  List<int>? myList; // null
  print(myList?.length ?? 0); // 0
  myList ??= [1, 2, 3];
  print(myList.length); // 3
}

davidmigloz

void main() {
  final score = 7;
  final result = score >= 5 ? "Passed" : "Failed";
  String message;
  switch (result) {
    case "Passed":
      message = "Congratulations!";
      break;
    case "Failed":
      message = "Keep trying!";

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