Re: [Caml-list] Differences between Array and Strings

[Philippe Wang <mail@philippewang.info>]

It's a weird feature of OCaml...

Anyway, if you want to allocate a string, you should write

let l () = String.copy "1"
instead of
let l () = "1"

-- 
Philippe Wang
   mail@philippewang.info



On Fri, Apr 29, 2011 at 1:51 PM,  <louis.jachiet@ens.fr> wrote:
> Hi, I'am failing to understand the behavior of the code below. Why the string
> is not regenerated ? Why strings and array have not the same behavior ?
>
>> let l () = "1" ;;
>> (l ()).[0] <- '2';;
>> l ();;
>> l()==l();;
>
>> let l () = [|1|] ;;
>> (l ()).(0) <- 2;;
>> l ();;
>> l() == l() ;;
>
> # val l : unit -> string = <fun>
> # - : unit = ()
> # - : string = "2"
> # - : bool = true
> #   val l : unit -> int array = <fun>
> # - : unit = ()
> # - : int array = [|1|]
> # - : bool = false
>
> Louis Jachiet