in reply to Is there a simple syntax to logically slice a hash?
I tend to do:
my %h2; /^cat/ and $h2{ $_ } = $h1{ $_ } for keys %h1;
Which might be seen as "cheating" as a one-liner; but it is often difficult to put the initialisation of a hash inline.
It is also quite more efficient than map and/or grep for larger hashes, by avoiding the creation of intermediate lists.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
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Seekers of Perl Wisdom