---
title: "Andreas Herd (@Mendrik) | Hashnode"
description: "Andreas Herd (@Mendrik) writes on Hashnode. Read their latest articles and follow their work."
url: "https://hashnode.com/@Mendrik"
---

@Mendrik

# Andreas Herd

@Mendrik · Joined March 2023

## Comments

[What's the K in fromNullableK? I also saw optionT.](https://hashnode.com/posts/practical-guide-to-fp-ts-part-2/6071ba4b8b2b857c0bdb5e52/comment/61e8165e6f4d6f431978da6c#reply-6418ae476fd77cec7793b485)

Reply · Article · Mar 20, 2023 · [Practical Guide to Fp-ts P2: Option, Map, Flatten, Chain](https://hashnode.com/posts/practical-guide-to-fp-ts-part-2/6071ba4b8b2b857c0bdb5e52)