LeetCode 387. First Unique Character in a String in F#

URL https://leetcode.com/problems/first-unique-character-in-a-string/ Code https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/0387/main.fsx let firstUniqChar (s: string) : int = let rec firstUniqChar' cs (acc: int list []...