camlspotter avatar camlspotter committed 62cf8cd

added List.find_opt

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   from_to [] f t
+let find_opt f ls = try Some (List.find f ls) with Not_found -> None 
 let rec find_map_opt f = function
   | [] -> None
   | x::xs ->
 val from_to : int -> int -> int list
   (** [from_to f t = [f..t]] *)
+val find_opt : ('a -> bool) -> 'a list -> 'a option
 val find_map_opt : ('a -> 'b option) -> 'a list -> 'b option
 val filter_map : ('a -> 'b option) -> 'a list -> 'b list
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