On 10 Aug., 00:58, [EMAIL PROTECTED] (Patrick R. Michaud) wrote:
> On Fri, Aug 08, 2008 at 07:32:52AM +0200, Carl Mäsak wrote:
> > Jonathan (>):
> > > That this means the { $_ => uc $_; } above would end up composing a Hash
> > > object (unless the semicolon is meant to throw a spanner in the
> > > hash-composer works?) It says you can use sub to disambiguate, but
>
> > > %ret = map sub { $_ => uc $_; }, split "", $text;
>
> > > Doesn't work since $_ isn't an automatic parameter for a sub, like it
> > > would
> > > be in just a block (in the implementation, and if I understand correctly
> > > in
> > > the spec too).
>
> > Out of curiosity, would this work?
>
> > %ret = map -> { $_ => uc $_; }, split "", $text;
>
> A pointy block with nothing after the arrow is a sub with zero params,
> so no, this wouldn't work. One would need something like
>
> %reg = map -> $_ { $_ => uc $_; }, split "", $text;
>
> > Or this?
>
> > %ret = map { $^foo => uc $^foo; }, split "", $text;
>
> I'm thinking S04 probably needs some clarification/updating here.
> Any block that contains a (placeholder) parameter probably needs
> to remain a sub, even if the block content is a comma-separated list
> starting with a pair/hash.
But then, what will happen to this:
%ret = map { { $^a => uc $^a } }, @arr;
I would expect that to be the same as
%ret = map -> $a { my %h={ $a => uc $a }; %h }, @arr;
Regards,
Ron
