Front page | perl.perl5.porters |
Postings from June 2013
On Tue, Jun 11, 2013 at 3:06 PM, Mark Overmeer <mark@overmeer.net> wrote:
> * Leon Timmermans (fawaka@gmail.com) [130611 10:53]:
> > my %first = (a => 1, b => 2);
> > my %second = %first{qw/a c/};
> >
> > Should %second now contain «c => undef», not no c at all? I think I'm
> > currently leaning towards the latter, it seems like the more useful
> > behavior to me.
>
> Do we need this compact syntax, or can we get
>
> my %second = slice %first, qw/a c/;
>
This is very doable as module and would be fast if written in XS.
I'm pushing my idea as it fits within existing syntax for slices and I
think completes the picture.
Love to have it in code, maybe in List::Util.
> (there already is a Hash::Slice)
>
> And I still love to have a
>
> push %grow, @pairs; # or
>
merge $grow, @pairs;
>
I love push to work on hashes, but it's semi-offtopic.
You're right that new functionality can be implemented as a keyword or
keyword like function and interface can be very similar to `push`, but if
you have $h{'a'}, @h{qw/a b/} then it's natural to have %h{qw/a b/}.
> --
> Regards,
>
> MarkOv
>
> ------------------------------------------------------------------------
> Mark Overmeer MSc MARKOV Solutions
> Mark@Overmeer.net solutions@overmeer.net
> http://Mark.Overmeer.net http://solutions.overmeer.net
>
>
--
Best regards, Ruslan.
Thread Previous
|
Thread Next