F# Spring 2025 Meetup @ Agical

Welcome to the first F# meetup of 2025! This time Agical will be our gracious hosts, and Functional Software will sponsor food and drinks.

Agenda

• 17:30 Doors open
• 18:00-18:30 Talk: Applicative Input Validation For Fun(ctor) And Profit
• 18:30 Drinks, food and mingle
• 20:30 Doors close

Talk

Applicative Input Validation For Fun(ctor) And Profit - Christoffer Ekeroth

Learn how to use monads and applicative functors to write elegant and composable input validation! This talk will cover how to use the Result monad to validate user input, using a custom Computation Expression. We will then improve upon this further by writing our own applicative functor to improve input validation. I promise it's not as scary as it sounds!

Food
There will be food and beverages at the event; you will be asked for allergies or food preferences when you RSVP.

Judging by how popular the last event was the seats might run out quick, so don't forget to save your seat by RSVP:ing!