Do I need to understand category theory to use this skill?

No, this guide is specifically designed to be jargon-free and practical, focusing on patterns that solve real-world coding problems today.

Does this skill help with asynchronous TypeScript code?

Yes, it provides patterns for TaskEither to help refactor complex async callback chains into clean, linear pipelines.

When should I avoid using functional programming patterns?

Avoid FP when it makes your code harder to read, for simple null checks where optional chaining works, in performance-critical hot paths, or if your team isn't familiar with the style.

What is the 80/20 approach to fp-ts?

It focuses on the five patterns that provide 80% of the benefits of functional programming—Pipe, Option, Either, Map, and FlatMap—while ignoring complex category theory jargon.

How does this skill improve error handling?

It teaches you to use the 'Either' type to make errors explicit in your types rather than throwing hidden exceptions, making your code more predictable and safe.

Pragmatic fp-ts Guide

Name: Pragmatic fp-ts Guide
Author: JantonioFC

byJantonioFC

•

Developer Tools

Simplifies functional programming in TypeScript by providing practical patterns and 80/20 guidance for the fp-ts library.

This skill offers a jargon-free approach to functional programming in TypeScript, focusing on the essential patterns that provide the most value without the academic overhead of category theory. It helps developers master the '80/20' of fp-ts—specifically Pipe, Option, Either, Map, and FlatMap—to create cleaner, more maintainable code. By providing clear 'before and after' refactoring examples and a pragmatic 'Golden Rule' for when to avoid FP, it ensures that functional patterns enhance rather than complicate your codebase.

Key Features

01Streamlined data transformation guides using map and flatMap

02Type-safe error handling and structured domain error patterns

03Practical implementation patterns for Pipe, Option, and Either types

042 GitHub stars

05Decision-making framework for functional vs. imperative styles

06Standardized refactoring recipes for nested ternaries and try-catch blocks

Use Cases

01Refactoring complex conditional logic or 'callback hell' into readable pipelines

02Implementing explicit, type-safe error handling in TypeScript services

03Onboarding developers to functional programming without academic jargon

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jantoniofc/skillsbank fp-ts-pragmatic

For use in Claude.ai and ChatGPT

Key Features

01Streamlined data transformation guides using map and flatMap

02Type-safe error handling and structured domain error patterns

03Practical implementation patterns for Pipe, Option, and Either types

042 GitHub stars

05Decision-making framework for functional vs. imperative styles

06Standardized refactoring recipes for nested ternaries and try-catch blocks

Use Cases

01Refactoring complex conditional logic or 'callback hell' into readable pipelines

02Implementing explicit, type-safe error handling in TypeScript services

03Onboarding developers to functional programming without academic jargon

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jantoniofc/skillsbank fp-ts-pragmatic

For use in Claude.ai and ChatGPT