Action

As explained in Refactoring to Rust

An action is an event or command describing a state transition that a component should process.

How Refactoring to Rust covers it

How deep it goes

Defines actions as enums and traces their handling through update, stopping short of broader action-system design.

Examples

Uses pagination, feed-fetch states, button callbacks, and asynchronous search results as concrete action examples.

What you can do after

Build it from scratch by defining message variants and implementing update logic for component events and asynchronous results.

How it connects

Connects actions with component state, messages, Model-View-Controller, asynchronous work, and view rendering.

liveBookmanning.com

Read Refactoring to Rust on liveBook Get the book at manning.com

Also explained in

• 

  liveBookmanning.com
  Grokking SimplicityAn action is a computation whose observable result depends on when or how it is performed and may involve effects beyond producing a value.
• 

  liveBookmanning.com
  Optimization Algorithms: AI techniques for design, planning, and control problemsAn action is a choice made by a reinforcement-learning agent in a given state that affects subsequent states and rewards.
• 

  liveBookmanning.com
  Authorization in ActionAn action is an operation that a principal attempts to perform on a resource.
• 

  liveBookmanning.com
  AI Agents in ActionAn agent action is an operation an agent selects or performs to advance a task.
• 

  liveBookmanning.com
  Build a Robo-Advisor with Python (From Scratch)An action is a decision selected by an agent that can change the state of its environment.
• 

  liveBookmanning.com
  Grokking AI Algorithms, Second EditionAn action is a choice or operation that an agent performs in an environment to change its situation or obtain an outcome.
• 

  liveBookmanning.com
  Practical Automation with PowerShell: Effective scripting from the console to the cloudAn automation action is an individual operation or step performed during an automated process to achieve its goal.
• 

  liveBookmanning.com
  The Design of Web APIs, Second EditionAn action is the intended effect that an operation applies to a resource, expressed by the main verb in the operation description.
• 

  liveBookmanning.com
  AI Agents in Action, Second EditionAn action is an operation an AI agent performs that can affect its environment or internal state.
• 

  liveBookmanning.com
  Experimentation for EngineersA candidate choice made by a contextual bandit, such as displaying one particular post.
• 

  liveBookmanning.com
  Causal AIAn action is a decision or operation selected by an agent or performed by an individual in a given situation.
• 

  liveBookmanning.com
  Natural Language Processing in Action, Second EditionA bot action is an executable response or operation that a conversational system performs after processing user input.

Compare how 13 books explain action →

Related concepts

• interventioncontrasts with · An intervention is a deliberate, externally imposed change or control applied to a variable or system to alter or assess its behavior or outcomes.
• multi-armed banditproduced by · A multi-armed bandit is a sequential decision problem in which an agent chooses among options with uncertain rewards, balancing reward seeking with gathering information about those options.
• demonstrationpart of · A demonstration is an example pairing an input, request, or prompt with a corresponding output, answer, or label to illustrate a task or expected behavior.
• PARC modelpart of · The PARC model is an authorization framework that describes an access decision using a principal, action, resource, and conditions or context.

This explainer was generated by Manning's knowledge graph from the text of Refactoring to Rust. The section links point to the parts of the book it draws on.