&= means take only the bits that are set to 1 in both operands ~ reverses all bits, << moves the bits to the left n times, | combines bits from operands so hour = (bufm[1] &= ~((1 << 7) | (1 << 6) | (1 << 5))); // 128, 64, 32 hour = (bufm[1] … Read more
As described on the front-page of the API documentation for Dart: https://api.dart.dev dart:html: DOM manipulation for web apps (available only to web apps). dart:io: I/O for non-web apps. So dart:html can only be used if your target platform is web (so Dart code compiled to JavaScript). In your case, you are trying to make an … Read more
The Flutter linter is a tool that scans your code for potential problems and makes recommendations for fixes. Generally speaking, it’s a good practice to have the linter active because it can aid in error detection and better code maintenance. However, if you want to disable the linter for some reason, you can do so … Read more
This type mismatch error which means that you provide “String value ” but needs of integer type value for more information you refere this link Type ‘String’ is not a subtype of type ‘int’ of ‘index’ solved what should I do flutter. _TypeError (type ‘String’ is not a subtype of type ‘int’ of ‘index’) [closed]
It works for me Widget build(BuildContext context) { return new StreamBuilder( stream: Firestore.instance.collection(‘COLLECTION_NAME’).document(‘TEST’).snapshots(), builder: (context, snapshot) { if (!snapshot.hasData) { return Center(child: CircularProgressIndicator()); } var userDocument = snapshot.data; return new Text(userDocument[“property_name”]); } ); } 1 solved How to get specific document data from firebase and return as a string
You code is missing a lot of pieces. Just because Dart allows you to write code like a sloppy web developer, does not mean you should. Dart is strongly typed, that is an advantage, please use it. Problems: ceviri has no explicit type. wiki has no explicit return type. wiki is not awaited Your anonymous … Read more
// @dart=2.12 void doSomething<T>() { List<List<T>> pages = []; print(pages.runtimeType.toString()); } void main() { doSomething<String>(); } Result JSArray<List<String>> solved Null Safety equivalent of “List()”? [duplicate]
A value of type ‘Null’ can’t be assigned to a parameter of type ‘Key’ in a const constructor. Try using a subtype, or removing the keyword ‘const’ solved A value of type ‘Null’ can’t be assigned to a parameter of type ‘Key’ in a const constructor. Try using a subtype, or removing the keyword ‘const’
You need to add the google map API key on ios/Runner/AppDelegate.swift file import UIKit import Flutter import GoogleMaps @UIApplicationMain @objc class AppDelegate: FlutterAppDelegate { override func application( _ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? ) -> Bool { GMSServices.provideAPIKey(“GOOGLE_API_KEY”) GeneratedPluginRegistrant.register(with: self) return super.application(application, didFinishLaunchingWithOptions: launchOptions) } } 2 solved The iPhone app closes immediately when … Read more
A value of type ‘List<DocumentSnapshot>’ can’t be assigned to a variable of type ‘List<DocumentSnapshot>’ solved A value of type ‘List’ can’t be assigned to a variable of type ‘List’