TMTOWTDI . . .
use YAML::Syck qw( Dump );
my %orig = qw( a 1 b 2 c 3 d 4 e 5 f 6 );
my %new;
{
my @keys;
@new{ @keys } = @orig{ @keys = grep /[adf]/, keys %orig };
}
print Dump( { orig => \%orig, new => \%new } ), "\n";
exit 0;
__END__
---
new:
a: 1
d: 4
f: 6
orig:
a: 1
b: 2
c: 3
d: 4
e: 5
f: 6
The cake is a lie.
The cake is a lie.
The cake is a lie.
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