Elixir Best Practices

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Elixir Best Practices[edit]

Elixir is a powerful functional programming language that promotes clarity, maintainability, and extensibility. To make the most out of Elixir's capabilities, here are some best practices to follow:

Code Organization[edit]

  • **Use modules to group related functions**
  • **Create separate files for each module**
  • **Prefer smaller modules with focused responsibilities**

Naming Conventions[edit]

  • **Use descriptive and meaningful names**
  • **Follow the camel case convention for module and function names**
  • **Start module names with a capital letter**
  • **Start function and variable names with a lowercase letter**


  • **Document public functions with @doc and @spec**
  • **Include examples, parameter details, and return types in function documentation**
  • **Provide module-level documentation describing its purpose and usage**

Error Handling[edit]

  • **Use Elixir's built-in exception handling mechanisms**
  • **Avoid using fundamental types (e.g., :ok/:error) as error return values**
  • **Propagate errors using the `:ok`/`:error` tuple convention**


  • **Leverage Elixir's lightweight processes for concurrent tasks**
  • **Avoid using global state when possible**
  • **Prefer the use of message passing over shared memory for interprocess communication**


  • **Write comprehensive unit tests with ExUnit**
  • **Test boundary cases, edge cases, and error handling**
  • **Refactor and maintain tests alongside code changes**


  • **Measure and profile bottlenecks before optimizing**
  • **Use Elixir's built-in profiling tools for performance analysis**
  • **Leverage the Erlang ecosystem for performance-critical tasks**


  • **Validate and sanitize user input**
  • **Use secure coding practices to prevent common vulnerabilities**
  • **Follow best practices for storing and handling sensitive data**

Functional Programming[edit]

  • **Leverage Elixir's functional programming capabilities**
  • **Prefer immutability over mutable state**
  • **Avoid side effects and mutable state whenever possible**


  • **Stay up to date with the Elixir ecosystem and community**
  • **Leverage high-quality libraries and frameworks for common tasks**
  • **Engage with the community to gain insights and share knowledge**

For more in-depth articles on Elixir best practices, check out the following resources:

By following these best practices, you can ensure that your Elixir code stays clean, maintainable, and efficient while taking full advantage of the language's capabilities.