Drawing Heighway’s Dragon - Recursive Function Rewrite - From Imperative Style in Pascal 64 To Functional Style in Scala 3

[philipschwarz]

@BalmungSan you have indirectly contributed to this deck (Thanks!)
https://x.com/philip_schwarz/status/1913707001265144094

Map with updatable state

For the record, cats has mapAccumulate which is essentially what you want. PS: I also proposed to add it to the future stdlib: Add mapWithState · Issue #122 · scala/scala-library-next · GitHub