New post on /r/flutterdev subreddit:

Using a function in provider package
I am adding an event in the calendar in a map,
Map<DateTime, List<EventStore>> _events ={};Now When any date is selected in the calendar I want the events to show in the calendar, but In my case whenever any date is selected it does not show the event immediately but after reloading the app.
I have tried this for showing the events when any date is selected,on calendar

onDaySelected: eventModifierProvider.whenSelectedDay, 

on provider

 whenSelectedDay(_date,_event){ selectedEvents = _event.cast<EventStore>(); notifyListeners(); } 

It feels as if I have done any mistake in working with parameters. I have tried using Date
and event
of onSelectedDay
like above.
How can I show the events when any date is selected immediatly?

August 28, 2020 at 07:30AM by Aaaamaaaaaannnn
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August 28, 2020 at 10:37AM by sumi...@gmail.com
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August 28, 2020 at 10:25AM by tuttski
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<b>Top 10 Flutter Libraries And Plugins To Use In 2020</b>
Open-source has changed the manner in which software is written and distributed. It has played a significant role in making software development simple, fun and more approachable. Flutter is an open-source cross-platform mobile app development platform having a wide developer’s community that puts efforts to make it successful. Mobile application developer community grasped Flutter so rapidly that there are a lot of open-source packages for it in an extremely short timespan.Libraries and packages reduce the time required for development as developers don’t need to develop from scratch for trivial functionalities. Use of right packages eases the things like HTTP calls and image caching. Here we’ll see top 10 libraries and packages for <a href="https://solaceinfotech.com/blog/flutter-in-mobile-app-development/">flutter app development</a>. Top 10 Libraries For Flutter Development-1. GetIt-It is one of the most preferred and useful Flutter libraries that implements the service locator pattern and makes dependency injection breeze. Also it is necessary to follow a fixed pattern and also run through the same package frequently to make it unique, and the software does not get confused with file segregation.Most Common Usage:To access service objects like REST API clients, databasesAccess View/AppModels/Managers/BLoCs from Flutter Views2. rxdart-It is a reactive functional programming library for Google Dart based on ReactiveX. Google Dart has come up with amazing Streams API to provide alternative API to add ExDart functionality on top of it.How to use RxDart-<pre>import 'package:rxdart/rxdart.dart'; void main() { const konamiKeyCodes = const [ KeyCode.UP, KeyCode.UP, KeyCode.DOWN, KeyCode.DOWN, KeyCode.LEFT, KeyCode.RIGHT, KeyCode.LEFT, KeyCode.RIGHT, KeyCode.B, KeyCode.A, ]; final result = querySelector('#result'); document.onKeyUp .map((event) => event.keyCode) .bufferCount(10, 1) // An extension method provided by rxdart .where((lastTenKeyCodes) => const IterableEquality().equals(lastTenKeyCodes, konamiKeyCodes)) .listen((_) => result.innerHtml = 'KONAMI!'); </pre>3. URL Launcher-It helps to add plugin to every page. While building up a website or program there are some predefined schemas that perform various functions through it in a mobile software that is activated by ios and android too. These codes help to operate the page through a programming language. It is more useful when you want the OS to handle the URL for you. It supports multiple URL schemas like HTTP, mailto, SMS and so on.4. package_info-Package info plugin is used to fetch the data about the application’s version and other related things. This package is useful to check the app’s version at runtime and perform some tasks accordingly.Usage-<pre>import 'package:package_info/package_info.dart'; PackageInfo packageInfo = await PackageInfo.fromPlatform(); String appName = packageInfo.appName; String packageName = packageInfo.packageName; String version = packageInfo.version; String buildNumber = packageInfo.buildNumber; </pre>5. Cached network image-This flutter library helps to save the image information in the cache when it is viewed on the Internet from your device. It is created to use with placeholder and error widgets. It comes with sane-defaults along with many customization options so that you can start to use it right away. It is highly recommended for building eCommerce and similar apps.How to use-The CachedNetworkImage can be used directly or through the ImageProvider. With a placeholder.<pre>CachedNetworkImage( imageUrl: "http://via.placeholder.com/350x150"' placeholder: (context, url) => CircularProgressIndicator(), errorWidget: (context, url, error) => Icon(Icons.error), ), </pre>6. LocalAuth-It provides ways to perform local and on-device authentication. These authentication methods refer to biometric authentication i.e. Touch ID APIs for iOS and fingerprint…