After reading Scott Wlashin’s post (http://fsharpforfunandprofit.com/posts/railway-oriented-programming-carbonated/) on writing FizzBuzz in a more functional style and with the ability to have more rules (other than 3 => fizz, 5 => buzz, etc) I decided to give it a go myself. This represents the most idiomatic F# I could come up with, and I think it reads pretty well. It uses partial application, list operations, shorthand match-expressions-as-functions and option types.
let carbonate rules i = rules |> List.choose (fun (divisor, replacement) -> if i % divisor = 0 then Some replacement else None) |> function  -> string i | list -> String.concat "" list let carbonateAll rules = List.map (carbonate rules) let fizzbuzzbazz = carbonateAll [3, "fizz"; 5, "buzz"; 7, "bazz"] fizzbuzzbazz [100..110] |> printfn "%A"
See if you can follow how it works.