doyle-flutter

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

void main() => runApp(ProviderScope(child: Sys()));

class Sys extends StatelessWidget {
  const Sys({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) => MaterialApp(home: Main());

doyle-flutter

import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:webview_flutter/webview_flutter.dart';

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

class Sys extends StatelessWidget {
  const Sys({Key? key}) : super(key: key);

  @override

doyle-flutter

import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:in_app_purchase/in_app_purchase.dart';
import 'package:in_app_purchase_android/in_app_purchase_android.dart';

void main() {
  if (defaultTargetPlatform == TargetPlatform.android) {
    InAppPurchaseAndroidPlatformAddition.enablePendingPurchases();
  }

doyle-flutter

import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:in_app_purchase/in_app_purchase.dart';
import 'package:in_app_purchase_android/in_app_purchase_android.dart';

void main() {
  if (defaultTargetPlatform == TargetPlatform.android) {
    InAppPurchaseAndroidPlatformAddition.enablePendingPurchases();
  }

doyle-flutter

import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:in_app_purchase/in_app_purchase.dart';
import 'package:in_app_purchase_android/in_app_purchase_android.dart';

void main() {
  if (defaultTargetPlatform == TargetPlatform.android) {
    InAppPurchaseAndroidPlatformAddition.enablePendingPurchases();
  }

doyle-flutter

void main(){
  
  // 👿 반복문 사용에 가장 많이하는 실수
  List<int> l = List<int>.generate(10, (int i) => i);
  
  // 📌 1. Error  
//   for(int i in l){
//     if(i == 3){
//       l.add(123);
//     }

doyle-flutter

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

class MathController{}

class Math extends StatelessWidget {
  Math({Key? key}) : super(key: key);
  static const String path = "/math";
  final MathController _mathController = MathController();
  @override

doyle-flutter

import 'package:flutter/material.dart';

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

class Sys extends StatelessWidget {

  @override
  Widget build(BuildContext context) => MaterialApp(
    onGenerateRoute: (RouteSettings route){
      // if(route.name == Main.path) return MaterialPageRoute(

doyle-flutter

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

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

class Sys extends StatelessWidget {

  @override
  Widget build(BuildContext context) => MaterialApp(

doyle-flutter

import 'dart:typed_data';
import 'package:camera/camera.dart';
import 'package:flutter/material.dart';
import 'package:gallery_saver/gallery_saver.dart';
import 'package:image_picker/image_picker.dart';
import 'package:permission_handler/permission_handler.dart';

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

class Sys extends StatelessWidget {