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Introduction to reactive programming Most of the data stream had gone to become the spine of your particular application when you are using the programming of reactive. There are calls, messages, events, and other failures that are conveyed by the stream of data. You can also observe with the react and flows as the value is emitted with the programming of reactive. You can also create data streams in your code from anything and of anything, for example, cache events, notifications of availability, ingested messages, requires of HTTP, and sensor measures that would happen or change. It would be the most exciting effect on the application as it becomes asynchronous inherently. The bites of misused asynchrony  There is an essential concept in the programming of reactive that is asynchronous. Every developer would be notified that the data emitted in-stream asynchronously as it is independent of program flow. You can also write the code that is invoked as the stream may emit the

How to fix FirebaseApp with name [DEFAULT] doesn't exist issue with flutter This is a very common issue when we try to google authenticate our app with flutter. Please check the following are done in your app. Updated the android build.gradle file Updated the android\app build.gradle file Added dependency to pubspec.yaml Placed the google-services.json file Check Updated the android build.gradle file Add the following line to the android/build.gradle file please add the following line to that file. classpath 'com.google.gms:google-services:4.3.2' // Google Services plugin Check Updated the android\app build.gradle file Add following line to the following location apply plugin : 'com.google.gms.google-services' Check Added dependency to pubspec.yaml firebase_auth : ^0.14.0+5 google_sign_in : ^4.0.7 Placed the google-services.json file make sure you have added google-services.json from the firebase