# Restartable functions from first principles

DevFeed: [Restartable functions from first principles](<https://devfeed.tech/articles/restartable-functions-from-first-principles-30533.md>)

Original publisher: [Read original article](<https://blog.zachklipp.com/restartable-functions-from-first-principles/>)

Author: Zach Klippenstein

Published: 2024-07-12T02:38:58Z

Content type: tutorial

Language: en

Sources: [Zach Klippenstein's Blog](<https://devfeed.tech/sources/zach-klippenstein-s-blog.md>)

Topics: [Jetpack Compose](<https://devfeed.tech/topics/jetpack-compose.md>), [Compose](<https://devfeed.tech/topics/compose.md>), [Code](<https://devfeed.tech/topics/code.md>), [data](<https://devfeed.tech/topics/data.md>)

Tags: [android](<https://devfeed.tech/tags/android.md>), [callback](<https://devfeed.tech/tags/callback.md>), [compose-state-series](<https://devfeed.tech/tags/compose-state-series.md>), [function](<https://devfeed.tech/tags/function.md>), [implementation](<https://devfeed.tech/tags/implementation.md>), [jetpack-compose](<https://devfeed.tech/tags/jetpack-compose.md>), [kotlin](<https://devfeed.tech/tags/kotlin.md>), [lambda](<https://devfeed.tech/tags/lambda.md>), [modifiers](<https://devfeed.tech/tags/modifiers.md>), [snapshot](<https://devfeed.tech/tags/snapshot.md>), [state](<https://devfeed.tech/tags/state.md>)

## AI overview

This tutorial explains how restartable functions work in Jetpack Compose. It describes how callers track state objects read by a function, observe changes, and re-execute or schedule the function when relevant state changes.

## Source excerpt

Often when thinking about Jetpack Compose state, we think in terms of what code will be re-executed when that state changes. We call functions