Re: RFC 124 (v1) Sort order for any hash

[Hildo Biersma]

"David L. Nicol" wrote:
> 
> Hildo Biersma wrote:
> >
> > > =head1 ABSTRACT
> > >
> > > Herein a new syntax is introduced to specify a sort function
> > > for the keys of any hash.
> > >
> > > =head1 DESCRIPTION
> > >
> > >         %professors{ $a->name cmp $b->name };
> >
> > I feel the sort order should be specified on the iterator, not on the
> > hash variable.  It should be possible to have nexted loops traversing
> > the same hash in different orders.
> >
> > Hildo
> 
> What would that look like?

Ah, syntax - I have no idea.

One thing we could do, theoretically:

%hash = ('James' => 'Gibbon',
         'Dave'  => 'Mallon',
         'Pete'  => 'Munro');

while (my ($key, $value) = each alphabetic %hash) {
  ...
}

sub alphabetic (pair $a, pair $b) {
  return value $a cmp value $b || key $a cmp key $b;
}

Hildo