Re: [Caml-list] List.fold_left vs. Hashtbl.fold

[Malcolm Matalka <mmatalka@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 1297 bytes --]

Jane St Core uses labeled arguments to avoid this issue, worth considering
if you can.
On Nov 28, 2012 5:18 PM, "Lukasz Stafiniak" <lukstafi@gmail.com> wrote:

> I have this problem too. Look _very closely_ at List.fold_left and
> List.fold_right. Hashtbl.fold should pretend to be like
> List.fold_left, because it is not supposed to preserve the structure
> of the underlying data structure in its computation, and it should be
> tail-recursive.
>
> On Wed, Nov 28, 2012 at 5:40 AM, William Smith <bills@wwayneb.com> wrote:
> > List.fold_left expects the List as the 3rd parameter with the second
> > parameter being the initial value.
> >
> > Hashtbl.fold expects the Hasthbl as the second parameter with the 3rd
> > parameter being the initial value... just the opposite of List.fold_left.
> >
> > Is there a reason for this difference?   I'm having trouble remembering
> > which goes which way.   If it's not a historical accident, I'd like to
> have
> > a understanding of why they are different to help me know which is which.
> >
> > Thanks,
> >
> > Bill
>
> --
> Caml-list mailing list.  Subscription management and archives:
> https://sympa.inria.fr/sympa/arc/caml-list
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs
>

[-- Attachment #2: Type: text/html, Size: 1922 bytes --]