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