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fp-option-ref

Reference fp-ts Option type operations for safe nullable data handling.

11|3|Updated Jan 30, 2026
Search Tags:#option#pipe#functional#nullable#fp-ts#maybe
One-click install
npx skills add https://github.com/whatiskadudoing/fp-ts-skills --skill fp-option-ref
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: fp-option-ref
Source: https://github.com/whatiskadudoing/fp-ts-skills/tree/main/skills/quick-ref/fp-option-ref
Command: npx skills add https://github.com/whatiskadudoing/fp-ts-skills --skill fp-option-ref

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill provides a concise reference for using the Option type in fp-ts to handle nullable values safely.

Core Features & Use Cases

  • Option navigation: Create, transform, and extract values with O.some, O.none, O.fromNullable, O.map, O.flatMap, O.getOrElse, etc.
  • Composition: Use pipe and functional composition to chain operations on optional data.
  • Use Case: Imagine validating a user profile where every field is optional; this quick reference guides safe access and defaults.

Quick Start

Use the fp-option-ref skill to quickly look up how to convert a nullable value to an Option and map it to a safe default.

Frequently Asked Questions about fp-option-ref

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I handle nullable data safely using fp-ts Option?▼

To handle nullable data safely using fp-ts Option, wrap values with O.fromNullable, transform them with O.map or O.flatMap, and extract safe defaults using O.getOrElse within a functional pipe.

What is the fp-ts Option type used for in functional programming?▼

The fp-ts Option type is used in functional programming to explicitly represent nullable values as Some or None, allowing you to safely manage data validation and optional fields without runtime null checks.

How do I chain functional operations on optional values with pipe in fp-ts?▼

You chain functional operations on optional values with pipe in fp-ts by passing an Option through sequential transformations like O.map and O.flatMap, safely propagating O.none and stopping execution if data is absent.

Does fp-ts Option work for validating optional fields in a user profile?▼

Yes, fp-ts Option works for validating optional fields in a user profile by treating each field as a nullable value, applying safe navigation with O.fromNullable, and providing fallbacks with O.getOrElse.

When should I use O.getOrElse versus O.fromNullable in fp-ts?▼

Use O.fromNullable in fp-ts to convert a potentially null value into an Option for safe mapping, and use O.getOrElse at the end of a pipe to unwrap the Option by providing a default value if it is O.none.

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