use Data::Dumper;

my $i1 =1;
my %hash = (k1 => {k2 => ($i1 ? 'this' : 'that')  });
print Dumper(\%hash) . "\n"; # this

$i1 = 0;
%hash = (k1 => {k2 => ($i1 ? 'this' : 'that')  });
print Dumper(\%hash) . "\n"; # that