Late Keyword

 /// late keyword: It has two use cases

///Declaring a non-nullable variable that's initialized after its declaration.
///Lazily initializing a variable.
//If we add "late" keyword at variable declaration time that means we promise to compiler that we will assign value
//to that variable before it is used.

void main() {
  Sample obj = Sample();
  obj.x = 10;
  print(obj.x);
}
class Sample {
  late int x;
}

Comments

Post a Comment

Popular posts from this blog

Pagination with Bloc Pattern in Flutter

Image
  import "package:flutter/material.dart" ; import "package:flutter_bloc/flutter_bloc.dart" ; import "package:pagination_practice/Pagination_with_Bloc/Bloc/bloc.dart" ; import "package:pagination_practice/Pagination_with_Bloc/Bloc/event.dart" ; import "package:pagination_practice/Pagination_with_Bloc/Bloc/state.dart" ; import "package:pagination_practice/Pagination_with_Bloc/post_repo.dart" ; void main () { runApp ( const MyApp () ) ; } class MyApp extends StatelessWidget { const MyApp ( { super .key } ) ; @override Widget build ( BuildContext context ) { return RepositoryProvider < PostRepo >( create: ( context ) => PostRepo () , child: BlocProvider < PostBloc > ( create: ( context ) => PostBloc ( context.read < PostRepo > () ) ..add ( FetchPostsEvent () ) , child: MaterialApp ( title: "Pagination" , debugShowCheckedModeBa...
Read more

Pagination First Practical in Flutter

Image
  import "package:dio/dio.dart" ; import "package:flutter/material.dart" ; import "package:flutter_spinkit/flutter_spinkit.dart" ; import "package:pagination_practice/Pagination/Model/productModel.dart" ; void main () { runApp ( const MyApp () ) ; } class MyApp extends StatelessWidget { const MyApp ( { super .key } ) ; @override Widget build ( BuildContext context ) { return MaterialApp ( title: "HomePage" , debugShowCheckedModeBanner: false, theme: ThemeData ( appBarTheme: const AppBarTheme ( backgroundColor: Colors. grey , centerTitle: true, ) , ) , home: const HomePage () , ) ; } } class HomePage extends StatefulWidget { const HomePage ( { super .key } ) ; @override State < HomePage > createState () { return HomePageState () ; } } class HomePageState extends State < HomePage > { final ScrollController scrollController = Scrol...
Read more

ExpansionPanel with ExpansionPanelList with Complete Collapse Operation in Flutter

Image
  import "package:flutter/material.dart" ; import "package:sdreatech_learning_widget/All_widgets_Ui/customWidget.dart" ; void main () { runApp ( const MyApp () ) ; } class MyApp extends StatelessWidget { const MyApp ( { super .key } ) ; @override Widget build ( BuildContext context ) { return MaterialApp ( title: "ExpansionPanel" , debugShowCheckedModeBanner: false, theme: ThemeData ( appBarTheme: const AppBarTheme ( backgroundColor: Colors. grey , centerTitle: true, ) , ) , home: const ExpansionPanelListPracticalCollapseTask () , ) ; } } class ExpansionPanelListPracticalCollapseTask extends StatefulWidget { const ExpansionPanelListPracticalCollapseTask ( { super .key } ) ; @override State < ExpansionPanelListPracticalCollapseTask > createState () => _ExpansionPanelListPracticalCollapseTaskState () ; } class _ExpansionPanelListPracticalCollapseTaskState...
Read more