nsmirosh

import re

first_message_index = 4
step_index = 6

def get_first_alphabetic_character_pos(s):
    m = re.search(r'[a-z]', s, re.I)
    if m is not None:
        return m.start()
    return 0

nsmirosh

data class User(val id: String, val nickname: String)
data class Message(val id: String, val message: String?, val user: User)

val users = listOf(
    User("000", "Bender"),
    User("001", "Leela"),
    User("002", "Fry"),
    User("003", "Zoidberg")
)

nsmirosh

data class User(val id: String, val nickname: String)
data class Message(val id: String, val message: String?, val user: User)

val users = listOf(
    User("000", "Bender"),
    User("001", "Leela"),
    User("002", "Fry"),
    User("003", "Zoidberg")
)

nsmirosh

import 'dart:async';

void main() async {
   final subscription = numberStreamWithController(8)
      .listen((event) => print("received $event"));

  await Future.delayed(Duration(seconds: 3));

  print("idling for 2 seconds");
  subscription.pause();

nsmirosh

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(body: MyStatefulWidget()),
    );

nsmirosh

void main() {
  Future.delayed(Duration(seconds: 1), () => throw 'Boom!')
      .catchError(
        (e) => print('error we caught: $e'),
      )
      .whenComplete(() =>
          print('doing something regardless of what happened previously'));
}

nsmirosh

void main() async {
  try {
    await Future.delayed(Duration(seconds: 1), () => throw 'Boom!');
  } catch (e) {
    print('error we caught: $e');
  } finally {
    print('doing something regardless of what happened previously');
  }
}

nsmirosh

void main() {
  final myFuture = _runTheFuture();
  print('myFuture.runtimeType: ${myFuture.runtimeType}');
}

_runTheFuture() {
  print('print statement before invoking the future');

  Future.delayed(Duration(seconds: 2), () {
    print('Future completed!');

nsmirosh

void main() async {
  final myFuture = _runTheFuture();
  print('myFuture.runtimeType: ${myFuture.runtimeType}');
}

_runTheFuture() async {
  print('print statement before invoking the future');

  final myValue = await Future.delayed(Duration(seconds: 2), () {
    print('Future completed!');

nsmirosh

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
      body: RaisedButton(