问题
List.nth is 'T list -> int -> 'T, rather than the standard int -> 'T list -> 'T like Seq.nth.
This makes pipeline somewhat awkward.
Is there something behind the scene?
I don't know why.
回答1:
Might be for ocaml compatibility (or just laziness), but without deeper reasons concerning the implementation itself.
回答2:
This signature allows you to curry the function with respect to a given list. This allows you to keep a List.nth someList stored, and use it to get the nth element of the list without having to specify the list variable every time.
I'm not sure why it's nonuniform with respect to other F# functions, though.
来源：https://stackoverflow.com/questions/2968983/confused-with-f-list-nths-argument-order