Re: [Caml-list] reverse a list

[Roelof Wobben <r.wobben@home.nl>]

Roelof Wobben schreef op 19-10-2014 17:13:
> Philippe Wang schreef op 19-10-2014 15:59:
>> On Sun, Oct 19, 2014 at 2:34 PM, Malcolm Matalka <mmatalka@gmail.com> 
>> wrote:
>>> Lists are immutable so you'll be constructing a list as you consume
>>> another list.
>> Please don't formulate it this way, as it sounds to me as if the list
>> being "consumed" is disappearing (because that's what generally
>> happens when something is being "consumed").  :-/
>> To the beginners reading this: well, in OCaml, any given list will
>> never disappear before it actually becomes useless, and they may be
>> "consumed" over and over again without any "harm" happening to them.
>>
>
> Thanks all
>
> Now trying to find out how I can add things to the second list. I 
> think this can work 2::l2
>
> Roelof
>

I have found a way :

let rec test l1 l2 =
     match l1 with
     | [] -> l2
     | h :: t -> test t (h::l2)
  ;;

Roelof