chonghorizons

import 'package:flutter/material.dart';

// based on https://medium.com/flutter/learning-flutters-new-navigation-and-routing-system-7c9068155ade
// but update for null safety by Howard "Horizons" Chong, @chonghorizons on github

void main() {
  runApp(BooksApp());
}

class Book {

chonghorizons

// See https://stackoverflow.com/questions/70272959/jsonencode-doesnt-work-with-enum-extensions-is-there-a-workaround

import 'dart:convert';

enum Day { monday, tuesday }

extension ParseToJsonString on Day {
  String toJson() {
    return this.toString().split('.').last;
  }

chonghorizons

// This code is distributed under the MIT License.
// Copyright (c) 2018 Felix Angelov.
// Ported to dartpad.dev 2021 by Howard "horizons" Chong.
// You can find the original at https://github.com/felangel/bloc.
// Specifically, see https://github.com/felangel/bloc/tree/master/examples/flutter_counter
// 
// The tutorial/guide at https://bloclibrary.dev/#/fluttercountertutorial describes this code.
// Linkback to DartPad: https://dartpad.dev/90da115645caf06ffe10dc8ab170f347
//
// ===== TROUBLESHOOTING INSTRUCTIONS =====

chonghorizons

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: "Empty Containers aren't rendered",
      debugShowCheckedModeBanner: false,

chonghorizons

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: "Empty Containers aren't rendered",
      debugShowCheckedModeBanner: false,

chonghorizons

// Copyright 2017, 2020 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file.

import 'package:flutter/material.dart';

void main() {
  runApp(
    const FriendlyChatApp(),
  );

chonghorizons

// Copyright (c) 2021 Howard Chong
// See discussion of FractionalSizedBox in https://stackoverflow.com/questions/57242651/using-fractionallysizedbox-in-a-row/70026340#70026340
import 'dart:math' as math;
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';

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

class MyApp extends StatelessWidget {
  @override

chonghorizons

//Based on the blog article by "The Plumber" https://www.kindacode.com/article/flutter-drawing-an-n-pointed-star-with-customclipper/


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

// This custom clipper help us achieve n-pointed star shape
class StarClipper extends CustomClipper<Path> {
  /// The number of points of the star

chonghorizons

// Note: Although a final object cannot be modified, its fields can be changed. In comparison, a const object and its fields cannot be changed: they’re immutable.

void main() {
  const String name='Howard';
  final stats= {'age': 42, 'income': 0};
  const unchangeableStats={'hair': "black", "race": "chinese"};
  var normalMap= {};
  
  print("My age is ${stats['age']}");
  stats['age']=stats['age']!.toInt()+1;

chonghorizons

import 'dart:math' as math;

const double originX=5;
const double originY=5;


class Point {
   double x;
   double y;