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"99 OCaml" #1

Write a function last : 'a list -> 'a option that returns the last element of a list.

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let rec last = function
    | [ h ] -> Some h
    | h :: t -> last t
    | [] -> None

last [ "a" ; "b" ; "c" ; "d" ]
last ([ ] : int list)
val last : _arg1:'a list -> 'a option

Full name: Script.last
val h : 'a
union case Option.Some: Value: 'T -> Option<'T>
val t : 'a list
union case Option.None: Option<'T>
Multiple items
val int : value:'T -> int (requires member op_Explicit)

Full name: Microsoft.FSharp.Core.Operators.int

--------------------
type int = int32

Full name: Microsoft.FSharp.Core.int

--------------------
type int<'Measure> = int

Full name: Microsoft.FSharp.Core.int<_>
type 'T list = List<'T>

Full name: Microsoft.FSharp.Collections.list<_>
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Link:http://fssnip.net/rf
Posted:4 years ago
Author:DC F#
Tags: ocaml