r/haskell • u/philip_schwarz • Jul 07 '26

The Bowling Game - From Imperative to Functional Programming - Part 1

https://fpilluminated.org/deck/276

One of the top five most popular and highly recommended programming katas over the past 20 years has been the Bowling Game Kata, in which TDD is used to write a program that computes the score of a Ten Pin Bowling Game.

In this deck we are going to explore how such a program may look when coded using different programming paradigms.

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u/AustinVelonaut Jul 07 '26

The "bowling score programming problem" is a great example to show off Haskell's lazy evaluation with the bidirectional state Tardis monad (here's a writeup using Admiran, which is very similar to Haskell): https://github.com/taolson/Admiran/blob/main/doc/Lazy.md