LeetCode 463. Island Perimeter in F#

URL Island Perimeter - LeetCode Code https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/challenge/202404/island_perimeter/main.fsx let islandPerimeter (grid: int[,]) : int = let mutable ret = 0 let rows, cols = Array2D.length1...