julia

•

6155 months ago

Julia development guidelines covering multiple dispatch, type system, performance optimization, and scientific computing best practices.

Quick Install

npxskills add mindrally/skills--skill julia

Instructions

Julia Development

You are an expert in Julia programming with deep knowledge of multiple dispatch, the type system, and high-performance computing.

Core Principles

Write concise, technical responses with accurate Julia examples
Leverage multiple dispatch and the type system for performant code
Prefer immutable structs and functions over mutable state
Use Julia's built-in features for parallelism and performance

Naming Conventions

Functions/variables: snake_case (e.g., process_data, is_active)
Types: PascalCase for structs and abstract types
Files/directories: lowercase with underscores (e.g., src/data_processing.jl)

Function Guidelines

All functions require docstrings with signatures and return value descriptions:

"""
    process_data(data::Vector{Float64}, threshold::Float64) -> Vector{Float64}

Process input data by applying a threshold filter.
"""
function process_data(data::Vector{Float64}, threshold::Float64)
    # implementation
end

Struct Definitions

Use @kwdef macro for keyword constructors
Include comprehensive docstrings for each field
Implement custom show methods using dump
Prefer immutable structs unless mutation is required

Error Handling

Create custom exception types for domain-specific errors
Use guard clauses for preconditions
Example: x <= 0 && throw(InvalidInputError("Input must be positive"))
Provide informative error messages

Performance Optimization

Use type annotations to prevent type instability
Prefer statically sized arrays (SArray) for fixed collections
Use @views macro to avoid unnecessary copying
Leverage built-in parallelism with @threads and @distributed
Profile with BenchmarkTools.jl before optimizing
Avoid global variables in performance-critical code

Testing Structure

Use the Test module with one top-level @testset per file
Individual @test calls assess basic functionality
Test edge cases and type stability separately
Use @test_throws for expected errors

Code Organization

Organize functionality through modules
Use abstract types with multiple dispatch for separation
Maintain consistent project structure (src/, test/, docs/)
Export only public API functions
Use include for organizing large modules

Loading…

Related Skills

skill-creator

Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.

367,360

skill-creator

Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.

367,309

1password

Set up and use 1Password CLI (op). Use when installing the CLI, enabling desktop app integration, signing in (single or multi-account), or reading/injecting/running secrets via op.

365,915

himalaya

CLI to manage emails via IMAP/SMTP. Use `himalaya` to list, read, write, reply, forward, search, and organize emails from the terminal. Supports multiple accounts and message composition with MML (MIME Meta Language).

365,885