On Mon, Jun 10, 2013 at 4:17 PM, Lukas Mai <plokinom@gmail.com> wrote: > On 10.06.2013 13:33, Dave Mitchell wrote: > >> On Sun, Jun 09, 2013 at 06:51:23PM -0500, David Nicol wrote: >> >>> one of the perl6 RFCs suggested allowing a regex as a hash index >>> >>> @hash{/REGEX/} >>> >>> to mean >>> >>> @hash{ grep /REGEX/, keys %hash } >>> >> >> but that syntax already has a meaning: >> >> %h = qw(aa 1 bb 2 cc 3); >> $_ = 'aa bb'; >> print @h{/(\w+)/}; # prints 1 >> print @h{/(\w+)/g}; # prints 12 >> >> > Right, but @hash{qr/REGEX/} could work. Currently it stringifies the regex > object and uses that as a hash key, but that's not very useful IMHO. > No, it doesn't. Please reread the post to which you replied. There's no stringification of the pattern, It's accessing the keys whose name is the value of $1, $2, etc. after performing a match operation (against $_).Thread Previous | Thread Next