📖 About Elixir
Elixir is a dynamic, functional language designed for building scalable and maintainable applications. It leverages the Erlang VM, known for running low-latency, distributed, and fault-tolerant systems. Elixir excels at handling millions of concurrent connections.
🎯 Best For
- Real-time web applications (Phoenix)
- Distributed systems
- Concurrent applications
- Microservices
- IoT and embedded systems
🔧 Key Features
- Lightweight processes (actors)
- Fault tolerance and supervision trees
- Pattern matching
- Immutable data structures
- Metaprogramming with macros
- Hot code swapping
🛠️ Development Tools
Build
mix compile
Test
mix test
Coverage
mix test --cover
Run
mix run
📄 Package Contents (7 files)
AGENTS_RULES.md
Complete AI agent rules (universal)
- ELIXIR-specific best practices
- TDD workflow (Red-Green-Refactor)
- DDD principles and patterns
- Git workflow and commit format
- Code quality principles
.cursorrules
Quick reference for Cursor IDE
- Essential rules summary
- Links to full documentation
- Optimized for quick loading
.gitignore
Git exclusions
- ELIXIR-specific patterns
- Build artifacts
- IDE configuration files
- Dependency directories
AGENTS.md
Quick reference guide
- Common patterns
- Best practices summary
- Quick troubleshooting
README.md
Project template with examples
- Setup instructions
- Sample code and structure
- Testing examples
- Build and run commands
CODE_QUALITY_PRINCIPLES.md
Quality principles and best practices
- Avoid default values (fail-fast)
- Consistency across code paths
- Extract reusable functions
- ELIXIR-specific examples
CONTRIBUTING.md
Contribution guidelines
- TDD workflow (Red-Green-Refactor)
- Git commit format
- Code review process
- Testing requirements (90% coverage)
💻 Code Examples
Pattern Matching
defmodule User do
defstruct [:id, :name, :email]
def create(name, email) do
case validate(name, email) do
:ok -> {:ok, %User{id: UUID.uuid4(), name: name, email: email}}
{:error, reason} -> {:error, reason}
end
end
defp validate("", _), do: {:error, "Name required"}
defp validate(_, email) when not is_binary(email), do: {:error, "Invalid email"}
defp validate(_, _), do: :ok
end
Concurrent Processes
defmodule Counter do
def start_link(initial_value) do
Task.start_link(fn -> loop(initial_value) end)
end
defp loop(value) do
receive do
{:increment, caller} ->
send(caller, {:value, value + 1})
loop(value + 1)
{:get, caller} ->
send(caller, {:value, value})
loop(value)
end
end
end
Pipe Operator
users |> Enum.filter(&(&1.age >= 18)) |> Enum.map(&Map.put(&1, :adult, true)) |> Enum.sort_by(&(&1.age)) |> Enum.take(10)