AlexKenbo

import 'dart:async';

void main() {
  var streamController = StreamController();
  
  streamController.stream.listen(
    (data) => print('Got eem! $data'),
    onError: (err) => print('Got an error! $err'),
    onDone: () => print('Mission complete!'),
    cancelOnError: false,

AlexKenbo

import 'package:flutter/material.dart';
import 'dart:math';

void main() { 
  runApp(new MaterialApp(home: PositionedTiles()));
  

}

AlexKenbo

import 'package:flutter/material.dart';
import 'dart:math';

void main() { 
  runApp(new MaterialApp(home: PositionedTiles()));
  

}

AlexKenbo

import 'package:flutter/material.dart';
import 'dart:math';

void main() { 
  runApp(new MaterialApp(home: PositionedTiles()));
  

}

class PositionedTiles extends StatefulWidget {

AlexKenbo

import 'package:flutter/material.dart';
import 'dart:math';

void main() { 
  runApp(new MaterialApp(home: PositionedTiles()));
  

}

AlexKenbo

import 'package:flutter/material.dart';
import 'dart:math';

void main() { 
  runApp(new MaterialApp(home: PositionedTiles()));
  

}

AlexKenbo

import 'package:flutter/material.dart';

abstract class ExampleStateBase {
  @protected
  String initialText;
  @protected
  String stateText;
  String get currentText => stateText;

  void setStateText(String text) {

AlexKenbo

void main() {
  Map<String,dynamic> bob = {
  'name': 'Bob',
  }; 

  Map<String,dynamic> bobLike = {
    'name': 'Bob',
  }; 
  
  if(bob == bobLike) {

AlexKenbo

class Student{

    var _id;
    var _name;

    Student({this._id, this._name}); // error - имена параметров не могут начинаться с _

    void set id(int id) => _id = id;
    void set name(String name) => _name = name;
  }

AlexKenbo

String scream(int length) => "A${'a' * length}h!";

main() {
  final values = [1, 2, 3, 5, 10, 50];
  //Normal not functional:
  print('Normal, not functional: ');
  for (var length in values) {
    print(scream(length));
  }