What is Flutter and Firebase?

Flutter is Google’s UI toolkit for building beautiful, native applications from a single codebase for Android, IOS, etc. Whereas Firebase is Google’s cloud platform that helps you quickly develop high-quality apps focusing on app developments, its quality, and the growth of your business.

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What is AsyncSnapshot Flutter?

AsyncSnapshot<T> class Null safety. Immutable representation of the most recent interaction with an asynchronous computation . See also: StreamBuilder, which builds itself based on a snapshot from interacting with a Stream. FutureBuilder, which builds itself based on a snapshot from interacting with a Future.

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What is a Dart snapshot?

A Dart snapshot is just a binary serialization of the token stream, generated from parsing the code . A snapshot is not a “snapshot of a running program”, it’s generated before the tokens are turned into machine code. So, no program state is captured in a snapshot.

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What is transaction Flutter?

A transaction is an atomic read/write on a piece of data in a Firebase Realtime Database or Cloud Firestore . Flutter is a mobile development framework that uses the Dart language. This is how you perform a transaction using the firebase_database package in a Flutter app.

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How do I use a collection group in firestore?

You can do this manually by going to the Firebase Console, selecting the “Index” tab for Cloud Firestore, going to the “Single Field” section, clicking the “Add exemption” button, specifying you want to create an exemption for the “reviews” collection with the “author” field and a “collection group” scope, and then …

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