This allows developers to write code that’s easier to reason about since invariants cannot change once they’re established.
Today we’re open-sourcing Plank, an immutable model generator for i OS we created to achieve this.
To address this we moved to an immutable model layer.
Immutable objects differ from mutable objects in that they’re unable to be modified once they’re created, which inherently makes them thread-safe.
This does make your database open to anyone, even people not using your app, so be sure to restrict your database again when you set up authentication.
in this way overwrites data at the specified location, including any child nodes.
Every time a document is created or updated, it is assigned a new unique revision ID.
The IDs of past revisions are available, and the contents of past revisions may be available, but only if the revision was created locally and the database has not yet been compacted.
Since model objects are passed around through nearly all components of our application, it was important that our model layer could safely be used across threads.Tag Manager currently supports the following tags: If you're new to Google Tag Manager, we recommend that you learn more about containers, macros, and rules (Help Center) before continuing this guide.This section will guide developers through a typical Tag Manager workflow: If you would like your application to access the identifier for advertisers (IDFA) and tracking flag provided by that framework through the Google Tag Manager SDK macros, you'll also need to link these additional libraries: Google Tag Manager uses a default container on the first run of your application.This method is triggered once when the listener is attached and again every time the data, including any children, changes.The event callback is passed a event is fired every time data is changed at the specified database reference, including changes to children.To limit the size of your snapshots, attach only at the highest level needed for watching changes.