Thanks, this was super helpful. I'll have to spend the time going through functors this weekend to try to grok them.
But also F# doesn't allow null values, it uses the Option type as well.
F# most definitely allows null values. They might not be encouraged, you can't always assign a literal null to a type, but null is very much a first class concept in F#.
You're far less likely to run into them in F# code compared to C#, though.
