On: Reducing Code Nesting

[_3u10]

F# always gets me in the editing mode because after I write it the first time I realize there is some built in function that makes the whole thing so much easier. I realized my match statement inside of a recursive function was just reimplementing List.pick

[smosher → _3u10]

(I thought it was OCaml at first... then I realized you had `null` in there which isn't what you'd want.)

OCaml/F# are too convenient that way. There's a lot of library stuff that you won't always think to look for.