When two or more components need to share state in Ember, services are the canonical solution. This note outlines the minimal design, data boundaries, operational checks, failure modes, and when to rethink the service‑based approach.
rememberSaveable removes onSaveInstanceState boilerplate in Jetpack Compose, but it serializes into a Bundle with strict size limits and no guarantee across process death. Learn when to use it, how to write custom Savers, and how to verify state actually survives rotation.
An architecture note on using @ngrx/entity's createEntityAdapter for normalized collection state: requirements, minimal reducer and selector setup, server-data trust boundaries, tests, and the conditions that outgrow it.
Learn how to preserve widget values and app logic across Streamlit script reruns using session_state, with initialization, binding, reading, and reset patterns.
Learn when to use Workers KV for global read performance versus Durable Objects for strong consistency and atomic state management in Cloudflare Workers.
Stop risking state corruption and security leaks. Learn how to migrate Terraform from local state to a remote S3 and DynamoDB backend for secure, team-based collaboration.
Use remember with keys for cheap, eagerly computed derivations. Use derivedStateOf when the value depends on State objects and you want calculation deferred until the UI actually reads it—avoiding work during compositions where the derived value isn't needed.
Learn how to implement NgRx Effects to handle asynchronous API calls, prevent race conditions with RxJS flattening operators, and avoid common stream termination errors.