AgentSkillsCN

functional-programming

适用于编写函数式代码时——涵盖FP最佳实践（Lea不同于传统FP语言）。

SKILL.md
--- frontmatter
name: functional-programming
# IMPORTANT: Keep description on ONE line for Claude Code compatibility
# prettier-ignore
description: Use when writing functional code - covers FP best practices (Lea differs from traditional FP languages)

Functional Programming Best Practices

Quick Start

code
-- Prefer pure functions and immutable data
let double = (x) -> x * 2
[1, 2, 3] /> map(double) /> filter((x) -> x > 2)

Core Principles

  • •Immutability: Use let by default, maybe only when mutation is necessary
  • •Pure functions: No side effects, same input always produces same output
  • •Composition: Build complex behavior from simple, composable functions
  • •Higher-order functions: Pass functions as arguments, return functions

Lea-Specific Warnings

Lea differs from traditional FP languages:

  • •No currying - Use placeholders: 5 /> add(3, input)
  • •Pipes prepend - x /> fn(a) becomes fn(x, a)
  • •Mutable bindings - maybe allows mutation; avoid unless necessary
  • •No monads - Async uses #async decorator instead
  • •Opt-in types - Add :: Type :> ReturnType, use #strict for enforcement

Notes

  • •Prefer let over maybe
  • •Use pipelines (/>) for left-to-right data flow
  • •Callbacks receive (element, index)