Re: [Chicken-users] hash-table-walk + hash-table-delete!

[Kon Lovett]

On Mar 5, 2007, at 11:23 AM, Graham Fawcett wrote:

> On 3/5/07, Kon Lovett <address@hidden> wrote:
> > perversity tends to the maximum.
>
> I see you've been reading my code. ;-)
>
> > However I think a '(hash-table-remove! hash-table (-> key value
> > boolean))' procedure should be added to "extras.scm" just to be
> > "safe".
>
> Could you please explain that signature? I don't know how to interpret
> your (-> ...) form.

A strict prefix form:

(-> key value boolean) is (key value -> boolean) but should be  
(object object -> boolean) since there are no key & value types.

Multi-valued signatures are (-> ... (values ...)), and unspecified are
(-> ... unspecified-object). (or (-> ... (void)) when Chicken.)

> Cheers,
> Graham