Front page | perl.perl5.porters |
Postings from June 2013
On 3 June 2013 14:06, Ruslan Zakirov <ruz@bestpractical.com> wrote:
> HI,
>
> I've updated patches that add key/value hash slices to perl syntax:
>
> my %sub_hash = %hash{qw(some keys go here)};
Sounds cool.
However note that it is legal, but deprecated to write this:
$ perl -le'my $hash={foo=>"bar"}; print %$hash->{foo};'
Using a hash as a reference is deprecated at -e line 1.
bar
How does your patch impact this behavior?
Also what happens if I do:
my $sub_hash= %hash{thing};
does $sub_hash end up with the value 2 if "thing" existed, and with
the value 0 if it didn't?
If someone does this should it warn?
> This feature was discussed [1] back in Feb with Brad Gilbert. We agreed that
> for consistency this should work with arrays too as index/value array slice.
> I've added array functionality. Also, wrote a few basic tests.
>
> Main question is whether should I continue or stop right there as it never
> will be in the core?
>
> A quick review of the code [2] would be helpful too.
>
> [1] http://www.nntp.perl.org/group/perl.perl5.porters/2013/02/msg199485.html
> [2] https://github.com/ruz/perl5/tree/ruz/kvhslice-op
Thanks for working on this Ruslan!
Yves
--
perl -Mre=debug -e "/just|another|perl|hacker/"
Thread Previous
|
Thread Next