Filip Hracek filiph

Builds games and silly software experiments in @flutter, @dart-lang and sometimes other technologies.

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filiph / main.dart

Last active September 11, 2019 00:52

Implementation of the ring of circles in Flutter. Initial inspiration: https://twitter.com/InfinityLoopGIF/status/1101584983259533312. Kotlin implementation: https://gist.github.com/alexjlockwood/e3ff7b9a05dd91ff0955b90950bf7ee5

	import 'package:flutter/material.dart';
	import 'package:ring_of_circles/src/widget.dart';

	/// Just the app. Nothing to see here, except the code for changing
	/// the number of circles (`n`).
	void main() => runApp(MyApp());

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

filiph / main.dart

Last active July 11, 2021 10:22

A functional way to capitalize each word in a sentence (a.k.a. Title Case). This is not efficient -- use something like string_scanner if you need to run this in a tight loop.

	main() {
	var city = "new york";
	print(titleCase(city));
	}

	/// Inefficient way of capitalizing each word in a string.
	String titleCase(String text) {
	if (text.length <= 1) return text.toUpperCase();
	var words = text.split(' ');
	var capitalized = words.map((word) {

filiph / twitter_50k_followers.dart

Created June 14, 2019 11:11

Code for the 50K followers tweet: https://twitter.com/FlutterDev/status/1139200781905727489

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

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

	const List<List<int>> _pixels = [
	[1, 1, 1, 1, 0, 0, 1, 1, 0],
	[1, 0, 0, 0, 0, 1, 0, 0, 1],
	[1, 1, 1, 0, 0, 1, 0, 0, 1],
	[0, 0, 0, 1, 0, 1, 0, 0, 1],

filiph / so_provider_and_future.dart

Last active July 30, 2019 19:49

repro of https://stackoverflow.com/questions/56874563/how-to-structure-app-state-so-all-dependent-widgets-update-when-state-changes

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

	void main() => runApp(
	ChangeNotifierProvider<AppStateManager>.value(
	value: AppStateManager(),
	child: MyApp(),
	),
	);

filiph / function_no_typedef.dart

Created August 28, 2019 09:07

How to define function signature without a typedef

	main() {
	takesFunction((x) => "result: $x");
	}

	void takesFunction(String Function(int) callback) {
	final result = callback(42);
	print(result);
	}

filiph / main.dart

Created December 20, 2019 06:44

Happy Holidays from Filip

	import 'dart:math';

	import 'package:flutter/material.dart';

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

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

filiph / list_wheel_scroll_view.dart

Created January 6, 2020 19:39

list_wheel_scroll_view

	import 'package:flutter/material.dart';

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

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return MaterialApp(
	title: 'Flutter Demo',
	theme: ThemeData(

filiph / main.dart

Created January 9, 2020 18:55

Use curves other than linear

	import 'package:flutter/material.dart';

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

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return MaterialApp(
	title: 'Flutter Demo',
	theme: ThemeData(primarySwatch: Colors.blue),

filiph / main.dart

Last active January 30, 2020 23:55

Perception

	import 'package:flutter/material.dart';

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

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return MaterialApp(
	title: 'Perception is Everything',
	home: MyHomePage(),

filiph / main.dart

Last active February 13, 2020 20:44

IgnorePointer Widget of the Week

	import 'package:flutter/material.dart';

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

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return MaterialApp(
	title: 'Flutter Demo',
	home: MyHomePage(),

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