Coding

Andrei Lesnitsky lesnitsky

Coding

lesnitsky / biomes.dart

Last active March 13, 2024 19:32

	final visited = <(int, int)>{};

	Iterable<List<(int, int)>> getBiomes(List<List<int>> worldmap) sync* {
	visited.clear();

	for (int i = 0; i < worldmap.length; i++) {
	for (int j = 0; j < worldmap[i].length; j++) {
	if (visited.contains((i, j))) {
	continue;
	}

lesnitsky / guess-a-number-patterns.dart

Created July 12, 2023 13:53

Recursive guessing game with patterns

	import 'dart:io';
	import 'dart:math';

	final rng = Random();

	sealed class State {
	const State();
	}

	class UninitializedState extends State {

lesnitsky / field_duplication.dart

Created July 11, 2022 11:33

	class User {
	final String name;
	User({required this.name});
	}

	class SuperchargedUser extends User {
	final String ability;
	// no duplication of the "final String name;" here

	SuperchargedUser({super.key, super.name, required this.ability});

lesnitsky / styled.dart

Created May 10, 2022 12:09

Styled widget concept

	part 'my_widget.styled.dart'; // generated code here

	// below is what user writes

	@Style()
	// ^^^^ provided by the library
	class WidgetStyle {
	const WidgetStyle();

	final EdgeInsets padding => const EdgeInsets.all(8.0);

lesnitsky / main.dart

Created February 14, 2022 12:24

	class Comparable {
	final String content;

	Comparable(this.content);

	@override
	bool operator ==(other) {
	print('==');
	return other is Comparable && other.hashCode == hashCode;
	}

lesnitsky / email_form.dart

Created February 2, 2022 15:27

Email form

	class EmailForm extends StatelessWidget {
	final VoidCallback onSubmitted;
	final TextEditingController emailCtrl;
	final TextEditingController passwordCtrl;

	const EmailForm({
	Key? key,
	required this.onSubmitted,
	required this.emailCtrl,
	required this.passwordCtrl,

lesnitsky / main.dart

Last active October 29, 2021 16:00

wrappers registration + redux

	void main() {
	final store = Store<int>(counterReducer, initialState: 0);
	Flutter.registerWrapperWidget(StoreProvider(store: store)); // proposed API

	runApp();
	}

	class App extends StatelessWidget {
	@override
	Widget build(BuildContext context) {

lesnitsky / main.dart

Created October 29, 2021 15:58

AppModel + redux example

	final store = Store<int>(counterReducer, initialState: 0);

	void main() {
	runApp();
	}

	class App extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return MaterialApp(

lesnitsky / app_model.dart

Created October 19, 2021 23:57

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

	class AppModel extends InheritedWidget {
	const AppModel({
	Key? key,
	required Widget child,
	}) : super(key: key, child: child);

	static V get<K, V>(BuildContext context, K key) {

lesnitsky / runtime_type_key.dart

Created September 30, 2021 12:51

runtimeType key