Re: Is there a simple syntax to logically slice a hash?

[space_monk]

map perhaps??
You can map one hash to another, but it is probably just as untidy as your example :-)
Something like these for the two examples you gave (I haven't got perl on this machine so please send me a private message and I'll fix it if wrong)

%hash2 = map { $_ => $hash{$_} } grep (/^cat/} keys %hash;

# return empty list if ternary test fails....

%hash2 = map { $hash{$_} > 10 ? $_ => $hash{$_} : () } keys %hash;